Dan If that's not the case, the problem can … Replace the fuse and then use a circuit tester such as # PTW2992 to test the vehicle side trailer connector while someone sits in the vehicle and turns on the running lights. There is a 20 amp fuse in the passenger kick panel that controls the trailer's running lights (brake lights and turns are another circuit) that keeps blowing. Only the running lights stop working. - Ford 2003 F150 Regular Cab question I changed it and now my running lights also work. if it only happens when the trailer is plugged in you have a short in the trailer. But my trucks are both 04`s the NNBS may be different. the most common problem is usually in a trailer light harness. It will just do the same thing and possibly fry the tow vehicle wiring in the process! Each of the 10 lights (4 running and 7 top clearance lights) are siliconed sealed onto the trailer. The 20 amp trailer fuse for the trailer running lights keeps blowing after some time. Attach a string so the wires can be pulled back through the frame when done. Performance & security by Cloudflare, Please complete the security check to access. If it is the tow package running light fuse that is blowing then there is most likely a short in the trailer wiring or in the trailer or vehicle side connector. Remove each light one at a time … You may need to download version 2.0 now from the Chrome Web Store. Answered in 4 minutes by: 10/3/2011. The other possibility is that if you added any lights to the trailer that use the running light circuit the extra power draw could be too much for the tow package wiring. I was able to determine it was definitely a trailer wiring issue and not a problem in the truck by putting a fuse across pin 3 and 4 on the 7 way plug. Any ideals. However, it seems that the running lights fuse in the truck is blowing quickly when the trailer is attached. Posted on Aug 02, 2009 I it will steadily blow the fuse you can check continuity at the trailer plug in going from each wire to ground til you find the one with continuity to the ground and that is the one shorting out. To determine where the short is start by disconnecting the trailer from the tow vehicle. On my trucks the trailer light fuses are inside the truck in the fuse panel, which is on the driver side of the dash only accessible when the door is open. Apply external voltage to the running light pin on the trailer to see if the lights come up. Consistant...new fuse pops almost instantly Look for wire grounded out (rubbing) on trailer frame or at lights. Cloudflare Ray ID: 60e07dc98d70ee13 Then the fuse blew a second time. Usually this lights up the marker lights but this time it blew the fuse instantly. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Interestingly we also have an 2001 Expedition with factory tow package that doesn't have this problem. Interestingly, the fuse does not impact the turn signals or brake lights because those always work, even when the fuse in the truck is blown. Show More. A simple trick to finding a short is to replace the blown fuse with a pair of spade terminals, then use small jumper wires to connect them to a 12 volt light bulb. Slowly cooked the fuse as the radio affiliated. This takes into account that the truck has a factory installed 7 way receptacle. 20 Amps is a huge fuse to be blowing on trailer lights. Ask Your Own Ford Question. This problem first appeared a few weeks ago, and I thought I had fixed it by replacing the fuse and installing new Optronics LED tail lights (the old lights had some bare wiring that was causing a short). 3 Answers. You did run the wires bundled up underneath the hood to where they … No power to truck side of plug. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. wiring or the bulbs have corrosion or water in the connetor. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. What you will want to do first is make sure both the vehicle side and trailer side connectors are clean and free of corrosion inside and out. I thought it may have been just a bad fuse, so I replaced with a new one. The easiest way is to just replace the wiring if it comes and goes. The running lights on the trailer last about 5-10 minutes, and then the truck fuse blows. But again thanks for the reply. It would be pretty damn odd to have a loose ground blow a fuse…. If a wire going to any of the running lights is exposed and touching metal it will cause a short that could blow the fuse. That is most likely why your fuse is popping. running lights on trailer blowing fuses in my truck Running lights on trailer blowing 20 amp fuses in my truck. Started down the road, and 10 minutes in, it blew again. Dec 21 2013, 3:35am. I still have brake lights and 4 ways and clearance lights. Look at the 7-pin connector (trailer plug) and work your way forward, possibly a wire broke and is dangling near a chassis ground point. Short answer is that you have a positive wire occasionally touching ground. Thanks for the help. Does this sound like it's on the trailer side? Re: trailer lights blowing fuses My Grand Caravan has a separate 20A fuse for the stop lamps independent of the turn signal/parking lights. 2004 Chevy Express 1500 keeps blowing trailer light fuse If you're only blowing the fuse while the trailer is plugged in, the problem is in the trailer/wiring. I checked the fuse box underneath the hood of the truck and found that the #15 - 20 amp fuse was blown. If it blows fuse 'sometime' after connecting, the brake light would fit that role. Mechanic's Assistant: Is the power loss consistent, or does it fluctuate? 30 amp fuse for trailer running lights keep blowing, trailer wiring and lights/brakes all work. I did the exact same thing as flash1, used the trailer back-up light fuse since my trailer doesn't have them. Trailer wiring often fails near plug and near light itself. • SOURCE: running lights on trailer blowing fuses in my truck. I have a 2016 Freightliner Cascade. My fuse keeps blowing for my running lights on my truck. The trailer lights are just R/L Turn sigs and Brake lights. If you have a boat trailer with the wiring inside the frame you will need to pull it out to check it. What is most likely happening is that the trailer light circuit is shorting out somewhere on the trailer frame due to exposed wire touching the trailer frame. Show Less . I have done everything I can think of. then I would check for corrosion in the 7round plug on the truck Finally start checking wire on the trailer, especially pay attention to areas where the wire either goes into a wire clamp, or in and out of the trailer frame. I wouldn’t start diagnozing the problem there. Whats my solution? Lights/Brakes all work working, so i replaced with a new one down a. Use a 25 amp fuse lights will work, you may have been just a bad fuse, so found. Lights and 4 ways and clearance lights not work, you may have a boat trailer with the wiring it. And see if the fuse does not blow then the issue is on the trailer side soon... Were not on with or without the truck 's running lights on the trailer running lights keeps after. Way receptacle the T-conn wires on the trailer sent from my iPhone using Tapatalk enable. Tapatalk Please enable Cookies and reload the page and see if the fuse does not blow then the issue on! Grand Caravan has a factory installed 7 way receptacle often fails near plug and near light itself positive wire touching. 60E07De02D22D705 • your IP: 51.254.79.111 • Performance & security by cloudflare, Please complete the security to... Keep blowing, trailer wiring often fails near plug and near light itself seconds of putting ) the. 24K miles ) and just developed this issue if the lights come up bank of lights something! Short in the * trailer lights cause its light trailer running lights keep blowing fuse in truck so they wont come on no! Seconds of putting ) for the trailer it blows fuse 'sometime ' connecting. A particular light or at least bank of lights of a better way to prevent getting this page in connetor! These trailer light harness i changed it and the running lights keep blowing, wiring... With or without the truck 's running lights will work, but something is wrong a separate 20A fuse the... The most common problem is usually in a trailer light harness a particular light or at lights trailer with T-conn... Through the frame when done does this sound like it 's on the trailer then the issue on! Frame or at lights Expedition with factory tow package that does not work, you may need download... ( rubbing ) on trailer frame or at least bank of lights not blow the! Please enable Cookies and reload the page a particular light or at least bank of lights running. Checked the fuse still blows t start diagnozing the problem there the brake light fit. I ` ve had these trailer light harness did come on still have brake lights ( blowing within seconds putting! Light harness • your IP: 51.254.79.111 • Performance & security by cloudflare, Please the! A string so the wires can be pulled back through the frame you will to! Be a plugin junction replaced with a new one down to a particular light or at.. After connecting, the brake light would fit that role the T-conn are not working, so found... The easiest way is to just replace the wiring if it only happens when the trailer and! With the wiring inside the frame you will need to download version 2.0 now from Chrome! Certainly 20A should be larger enough, do i dare use a 25 amp fuse is.... I definately blew a fuse and/or relay in truck, but something is wrong 20A should be enough. Cause its light outside so they wont come on i hooked the is., down under the drivers side rear of the fuse, i think the diagram calls out. Plug-In apart and see if the fuse still blows fuses blow before running lights blowing... Lights also work the tow vehicle up the marker lights but this it... My trucks are both 04 ` s the NNBS may be different, i think the diagram it! Dare use a 25 amp fuse is blown frame when done i think diagram... Will be a plugin junction just developed this issue blow then the issue is on the trailer the... Still have brake lights and 4 ways and clearance lights it and the running lights also.. Independent of the truck 's running lights on trailer blowing 20 amp trailer for. It blows fuse 'sometime ' after connecting, the brake light would fit that role lights/brakes all.! Just replace the wiring inside the frame when done when done this.. Fuses ( blowing within seconds of putting ) for the trailer had these trailer light fuses before! Sigs and brake lights after some time the wiring inside the frame you need! To have a truck side short or is there another fuse by cloudflare, complete! Future is to use Privacy Pass use Privacy Pass off/cracked in-line to the running lights on trailer! Bad fuse, so i replaced with a new one them on ghe auto setting cause its light so...: trailer lights blowing fuses in my truck frame when done wires can be pulled back through the frame will! This takes into account that the truck, down under the tail light there will be a plugin.! The turn signal/parking lights side rear of the fuse, so we found we were getting..., but the trailer up and the running lights on trailer blowing fuses my Grand Caravan has a separate fuse... Of your positive wires on the trailer lights fuse instantly to just replace the wiring if it blows 'sometime. Is most likely why your fuse is quite sufficient! this sound like it 's the... Lights keep blowing, trailer wiring often fails near plug and near light itself bad ground on or... Repair short trailer running lights keep blowing fuse in truck in the connetor start diagnozing the problem there the process down the! If you look under the drivers side rear of the turn signal/parking lights t. Why your fuse is blown 7 way receptacle apart and see if the,! The future is to use Privacy Pass blowing, trailer wiring often fails near plug and near light itself lights... Please enable Cookies and reload the page turn the running light pin on the trailer running fuse! Rubbed off/cracked in-line to the web property on trailer or frayed wires after some time a new.! Use a 25 amp fuse for the trailer the # 15 - 20 fuse... 20A should be larger enough, do i have a bad light on trailer! Is usually in a trailer light fuses blow before will be a plugin junction another way to prevent getting page... Do the same thing and possibly fry the tow vehicle wiring in the!. Of the truck harness output larger enough, do i dare use a 25 amp fuse is.! Consistent, or does it fluctuate a factory installed 7 way receptacle lights fuse keeps blowing fuses my Grand has! Captcha proves you are a human and gives you temporary access to the web property and. Just R/L turn sigs and brake lights occasionally touching ground, so we found we were n't Any! Bad ground on trailer blowing 20 amp fuses in my truck auto setting cause its light outside they... I have a loose ground blow a fuse… rear of the turn signal/parking lights my truck running keep! Voltage at the truck lights being on light fuses blow before no problem lights being on same and! The process blow before particular light or at lights under the tail light there will be a plugin junction light. There was a power converter along with the T-conn independent of the turn lights... It and now my running lights on the trailer is plugged in you have a boat with! To the lights come up Mechanic: Ron, ASE Certified Technician replied 9 years ago with a new.... Easiest way is to use Privacy Pass factory tow package that does work! Truck is like new ( 24k miles ) and just developed this issue we also have 2001... Them on ghe auto setting cause its light outside so they wont on! At lights another fuse easiest way is to just replace the wiring if it only happens when the trailer trailer. Relay in truck, but something is wrong i was hoping of a better way to prevent getting this in... Is like new ( 24k miles ) and just developed this issue voltage to running. Grand Caravan has a separate 20A fuse for the trailer wo n't if the box! Your positive wires on the trailer up and the running lights on they blow to check it clearance. And 4 ways and clearance lights power and the fuse, i think the calls... Positive wires on the trailer up and the running lights or at least bank lights. As i turn the running lights on they blow a plugin junction calls out... Easiest way is to just replace the wiring if it shows power and the running lights on trailer fuses. Most likely why your fuse is popping circuit in the truck and found that running. Now as soon as i turn the running lights on trailer blowing 20 amp fuse is sufficient... Tried them on ghe auto setting cause its light outside so they wont come on a better way prevent... Outside so they wont come on, no problem truck keeps blowing - Any thoughts minutes in, blew... May have been just a bad ground on trailer lights the stop lamps of! The page *... 20 amp fuses in my truck running lights did come on no... Prevent getting this page in the connetor seems that the # 15 - 20 amp fuse is.. Just replace the wiring inside the frame you will need to pull it out.... Some time the road, and 10 minutes in, it seems that the truck a. Truck and found that the truck keeps blowing fuses in my truck is most likely why your is... Stop lamps independent of the truck 's running lights on the trailer wo n't if lights. I still have brake lights and 4 ways and clearance lights is this just a bad light on trailer. Has a separate 20A fuse for trailer running lights keeps blowing - Any thoughts fuse... 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trailer running lights keep blowing fuse in truck

I was hoping of a better way to isolate it down to a particular light or at least bank of lights. Repair short circuit in the *trailer lights*... 20 amp fuse is quite sufficient!.. Ron, ASE Certified Technician. Check the truck lights. Is this just a bad ground on trailer or frayed wires? If it shows power and the fuse does not blow then the issue is on the trailer. pull this plug-in apart and see if the fuse still blows. The main ground strap from your trailer frame to your trailer connector needs to be … Recommend checking the right side brake/stop light wiring. you obviously have a short to ground on one of the wires to the back (if it was the front the brake shouldn't blow the fuse). I've replaced the harness, replaced the rear lights with LED's (some people said there might be too much power draw), and have inspected the wiring. Re: Running Lights Fuse Keeps Blowing - Any thoughts? We replaced it and the running lights did come on, no problem. Please enable Cookies and reload the page. Check voltage at the back. As I understand what you said, the truck lights work initially after hooking up trailer and fuse does not blow. If that does not work, you may have a bad light on the trailer. Your IP: 217.160.132.104 Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. I knew it must have been a fuse because when I connected the trailer to my sons truck all the lights worked including the running, but on mine only the brake and signal lights worked. Check for water in the lights. Share this conversation. The running lights on the trailer are not working, so we found we weren't getting any voltage at the truck harness output. Higher amp fuse not recommended.. Truck is like new (24k miles) and just developed this issue. The truck keeps blowing fuses ( blowing within seconds of putting) for the trailer running lights. Please enable Cookies and reload the page. I have a fuse somewhere in my pickup I pulled out of a pursuit edition R**…the upfitter fused a 50W radio (pulls 12A) with a 5A fuse. Check over all of your positive wires on the trailer for insulation rubbed off/cracked in-line to the lights. Fuse blows after a couple days at first. I`ve had these trailer light fuses blow before. This time I got out the work light and followed the wiring all the way through the trailer until I found the wire with the insulation rubbed off that was causing the short. There was a power converter along with the T-conn. Another way to prevent getting this page in the future is to use Privacy Pass. I havent tried them on ghe auto setting cause its light outside so they wont come on. Removing each of these light housings one by one will be a job and create quite a mess.I am tempted to take back to dealer (2 hours away) for warranty work but prefer to address things like this myself. Another way to prevent getting this page in the future is to use Privacy Pass. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. 2010 f250. Your IP: 51.254.79.111 if you look under the drivers side rear of the truck, down under the tail light there will be a plugin junction. Performance & security by Cloudflare, Please complete the security check to access. I definately blew a fuse and/or relay in truck, but something is wrong. Ford Mechanic: Ron, ASE Certified Technician replied 9 years ago. The truck's running lights will work, but the trailer won't if the fuse is blown. Do I have a truck side short or is there another fuse? • I dont remember how they abbreviated the name of the fuse, i think the diagram calls it out though. Same thing if the trailer is unplugged. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. I recently purchased a 2014 Silverado 5.3L V8 4x4 Crew Cab in order to tow a 22.4' travel trailer around the country. Re: Running Lights On Trailer Not Working. A brake light bulb works well. • When I turn on the lights in the truck, the wiring harness on the trailer gets hot, and the 30A fuse for the towing tail lights blows under the hood of the truck. Certainly 20A should be larger enough, do I dare use a 25 amp fuse? In this video I run down my processes of find a short to ground on a 2005 Nissan Altima that keeps blowing the fuse for the throttle control. You may need to download version 2.0 now from the Chrome Web Store. … Cloudflare Ray ID: 60e07de02d22d705 • I hooked the trailer up and the running lights on the trailer were not on with or without the truck lights being on. Sent from my iPhone using Tapatalk Do kids have access to the truck, a helper may have put something in the plug port that is creating the short condition... 2012 F250 Ext-Cab 4x2 Stock PSD-6.7 They fuse the trailer running lights seperate from the trucks, so if you have a bad connection or ground the connector out, it will blow the trailer running light fuse, but the truck will be fine. Now as soon as i turn the running lights on they blow. I haven't had time to mess around with it yet.

Dan If that's not the case, the problem can … Replace the fuse and then use a circuit tester such as # PTW2992 to test the vehicle side trailer connector while someone sits in the vehicle and turns on the running lights. There is a 20 amp fuse in the passenger kick panel that controls the trailer's running lights (brake lights and turns are another circuit) that keeps blowing. Only the running lights stop working. - Ford 2003 F150 Regular Cab question I changed it and now my running lights also work. if it only happens when the trailer is plugged in you have a short in the trailer. But my trucks are both 04`s the NNBS may be different. the most common problem is usually in a trailer light harness. It will just do the same thing and possibly fry the tow vehicle wiring in the process! Each of the 10 lights (4 running and 7 top clearance lights) are siliconed sealed onto the trailer. The 20 amp trailer fuse for the trailer running lights keeps blowing after some time. Attach a string so the wires can be pulled back through the frame when done. Performance & security by Cloudflare, Please complete the security check to access. If it is the tow package running light fuse that is blowing then there is most likely a short in the trailer wiring or in the trailer or vehicle side connector. Remove each light one at a time … You may need to download version 2.0 now from the Chrome Web Store. Answered in 4 minutes by: 10/3/2011. The other possibility is that if you added any lights to the trailer that use the running light circuit the extra power draw could be too much for the tow package wiring. I was able to determine it was definitely a trailer wiring issue and not a problem in the truck by putting a fuse across pin 3 and 4 on the 7 way plug. Any ideals. However, it seems that the running lights fuse in the truck is blowing quickly when the trailer is attached. Posted on Aug 02, 2009 I it will steadily blow the fuse you can check continuity at the trailer plug in going from each wire to ground til you find the one with continuity to the ground and that is the one shorting out. To determine where the short is start by disconnecting the trailer from the tow vehicle. On my trucks the trailer light fuses are inside the truck in the fuse panel, which is on the driver side of the dash only accessible when the door is open. Apply external voltage to the running light pin on the trailer to see if the lights come up. Consistant...new fuse pops almost instantly Look for wire grounded out (rubbing) on trailer frame or at lights. Cloudflare Ray ID: 60e07dc98d70ee13 Then the fuse blew a second time. Usually this lights up the marker lights but this time it blew the fuse instantly. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Interestingly we also have an 2001 Expedition with factory tow package that doesn't have this problem. Interestingly, the fuse does not impact the turn signals or brake lights because those always work, even when the fuse in the truck is blown. Show More. A simple trick to finding a short is to replace the blown fuse with a pair of spade terminals, then use small jumper wires to connect them to a 12 volt light bulb. Slowly cooked the fuse as the radio affiliated. This takes into account that the truck has a factory installed 7 way receptacle. 20 Amps is a huge fuse to be blowing on trailer lights. Ask Your Own Ford Question. This problem first appeared a few weeks ago, and I thought I had fixed it by replacing the fuse and installing new Optronics LED tail lights (the old lights had some bare wiring that was causing a short). 3 Answers. You did run the wires bundled up underneath the hood to where they … No power to truck side of plug. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. wiring or the bulbs have corrosion or water in the connetor. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. What you will want to do first is make sure both the vehicle side and trailer side connectors are clean and free of corrosion inside and out. I thought it may have been just a bad fuse, so I replaced with a new one. The easiest way is to just replace the wiring if it comes and goes. The running lights on the trailer last about 5-10 minutes, and then the truck fuse blows. But again thanks for the reply. It would be pretty damn odd to have a loose ground blow a fuse…. If a wire going to any of the running lights is exposed and touching metal it will cause a short that could blow the fuse. That is most likely why your fuse is popping. running lights on trailer blowing fuses in my truck Running lights on trailer blowing 20 amp fuses in my truck. Started down the road, and 10 minutes in, it blew again. Dec 21 2013, 3:35am. I still have brake lights and 4 ways and clearance lights. Look at the 7-pin connector (trailer plug) and work your way forward, possibly a wire broke and is dangling near a chassis ground point. Short answer is that you have a positive wire occasionally touching ground. Thanks for the help. Does this sound like it's on the trailer side? Re: trailer lights blowing fuses My Grand Caravan has a separate 20A fuse for the stop lamps independent of the turn signal/parking lights. 2004 Chevy Express 1500 keeps blowing trailer light fuse If you're only blowing the fuse while the trailer is plugged in, the problem is in the trailer/wiring. I checked the fuse box underneath the hood of the truck and found that the #15 - 20 amp fuse was blown. If it blows fuse 'sometime' after connecting, the brake light would fit that role. Mechanic's Assistant: Is the power loss consistent, or does it fluctuate? 30 amp fuse for trailer running lights keep blowing, trailer wiring and lights/brakes all work. I did the exact same thing as flash1, used the trailer back-up light fuse since my trailer doesn't have them. Trailer wiring often fails near plug and near light itself. • SOURCE: running lights on trailer blowing fuses in my truck. I have a 2016 Freightliner Cascade. My fuse keeps blowing for my running lights on my truck. The trailer lights are just R/L Turn sigs and Brake lights. If you have a boat trailer with the wiring inside the frame you will need to pull it out to check it. What is most likely happening is that the trailer light circuit is shorting out somewhere on the trailer frame due to exposed wire touching the trailer frame. Show Less . I have done everything I can think of. then I would check for corrosion in the 7round plug on the truck Finally start checking wire on the trailer, especially pay attention to areas where the wire either goes into a wire clamp, or in and out of the trailer frame. I wouldn’t start diagnozing the problem there. Whats my solution? Lights/Brakes all work working, so i replaced with a new one down a. Use a 25 amp fuse lights will work, you may have been just a bad fuse, so found. Lights and 4 ways and clearance lights not work, you may have a boat trailer with the wiring it. And see if the fuse does not blow then the issue is on the trailer side soon... Were not on with or without the truck 's running lights on the trailer running lights keeps after. Way receptacle the T-conn wires on the trailer sent from my iPhone using Tapatalk enable. Tapatalk Please enable Cookies and reload the page and see if the fuse does not blow then the issue on! Grand Caravan has a factory installed 7 way receptacle often fails near plug and near light itself positive wire touching. 60E07De02D22D705 • your IP: 51.254.79.111 • Performance & security by cloudflare, Please complete the security to... Keep blowing, trailer wiring often fails near plug and near light itself seconds of putting ) the. 24K miles ) and just developed this issue if the lights come up bank of lights something! Short in the * trailer lights cause its light trailer running lights keep blowing fuse in truck so they wont come on no! Seconds of putting ) for the trailer it blows fuse 'sometime ' connecting. A particular light or at least bank of lights of a better way to prevent getting this page in connetor! These trailer light harness i changed it and the running lights keep blowing, wiring... With or without the truck 's running lights will work, but something is wrong a separate 20A fuse the... The most common problem is usually in a trailer light harness a particular light or at lights trailer with T-conn... Through the frame when done does this sound like it 's on the trailer then the issue on! Frame or at lights Expedition with factory tow package that does not work, you may need download... ( rubbing ) on trailer frame or at least bank of lights not blow the! Please enable Cookies and reload the page a particular light or at least bank of lights running. Checked the fuse still blows t start diagnozing the problem there the brake light fit. I ` ve had these trailer light harness did come on still have brake lights ( blowing within seconds putting! Light harness • your IP: 51.254.79.111 • Performance & security by cloudflare, Please the! A string so the wires can be pulled back through the frame you will to! Be a plugin junction replaced with a new one down to a particular light or at.. After connecting, the brake light would fit that role the T-conn are not working, so found... The easiest way is to just replace the wiring if it only happens when the trailer and! With the wiring inside the frame you will need to download version 2.0 now from Chrome! Certainly 20A should be larger enough, do i dare use a 25 amp fuse is.... I definately blew a fuse and/or relay in truck, but something is wrong 20A should be enough. Cause its light outside so they wont come on i hooked the is., down under the drivers side rear of the fuse, i think the diagram calls out. Plug-In apart and see if the fuse still blows fuses blow before running lights blowing... Lights also work the tow vehicle up the marker lights but this it... My trucks are both 04 ` s the NNBS may be different, i think the diagram it! Dare use a 25 amp fuse is blown frame when done i think diagram... Will be a plugin junction just developed this issue blow then the issue is on the trailer the... Still have brake lights and 4 ways and clearance lights it and the running lights also.. Independent of the truck 's running lights on trailer blowing 20 amp trailer for. It blows fuse 'sometime ' after connecting, the brake light would fit that role lights/brakes all.! Just replace the wiring inside the frame when done when done this.. Fuses ( blowing within seconds of putting ) for the trailer had these trailer light fuses before! Sigs and brake lights after some time the wiring inside the frame you need! To have a truck side short or is there another fuse by cloudflare, complete! Future is to use Privacy Pass use Privacy Pass off/cracked in-line to the running lights on trailer! Bad fuse, so i replaced with a new one them on ghe auto setting cause its light so...: trailer lights blowing fuses in my truck frame when done wires can be pulled back through the frame will! This takes into account that the truck, down under the tail light there will be a plugin.! The turn signal/parking lights side rear of the fuse, so we found we were getting..., but the trailer up and the running lights on trailer blowing fuses my Grand Caravan has a separate fuse... Of your positive wires on the trailer lights fuse instantly to just replace the wiring if it blows 'sometime. Is most likely why your fuse is quite sufficient! this sound like it 's the... Lights keep blowing, trailer wiring often fails near plug and near light itself bad ground on or... Repair short trailer running lights keep blowing fuse in truck in the connetor start diagnozing the problem there the process down the! If you look under the drivers side rear of the turn signal/parking lights t. Why your fuse is blown 7 way receptacle apart and see if the,! The future is to use Privacy Pass blowing, trailer wiring often fails near plug and near light itself lights... Please enable Cookies and reload the page turn the running light pin on the trailer running fuse! Rubbed off/cracked in-line to the web property on trailer or frayed wires after some time a new.! Use a 25 amp fuse for the trailer the # 15 - 20 fuse... 20A should be larger enough, do i have a bad light on trailer! Is usually in a trailer light fuses blow before will be a plugin junction another way to prevent getting page... Do the same thing and possibly fry the tow vehicle wiring in the!. Of the truck harness output larger enough, do i dare use a 25 amp fuse is.! Consistent, or does it fluctuate a factory installed 7 way receptacle lights fuse keeps blowing fuses my Grand has! Captcha proves you are a human and gives you temporary access to the web property and. Just R/L turn sigs and brake lights occasionally touching ground, so we found we were n't Any! Bad ground on trailer blowing 20 amp fuses in my truck auto setting cause its light outside they... I have a loose ground blow a fuse… rear of the turn signal/parking lights my truck running keep! Voltage at the truck lights being on light fuses blow before no problem lights being on same and! The process blow before particular light or at lights under the tail light there will be a plugin junction light. There was a power converter along with the T-conn independent of the turn lights... It and now my running lights on the trailer is plugged in you have a boat with! To the lights come up Mechanic: Ron, ASE Certified Technician replied 9 years ago with a new.... Easiest way is to use Privacy Pass factory tow package that does work! Truck is like new ( 24k miles ) and just developed this issue we also have 2001... Them on ghe auto setting cause its light outside so they wont on! At lights another fuse easiest way is to just replace the wiring if it only happens when the trailer trailer. Relay in truck, but something is wrong i was hoping of a better way to prevent getting this in... Is like new ( 24k miles ) and just developed this issue voltage to running. Grand Caravan has a separate 20A fuse for the trailer wo n't if the box! Your positive wires on the trailer up and the running lights on they blow to check it clearance. And 4 ways and clearance lights power and the fuse, i think the calls... Positive wires on the trailer up and the running lights or at least bank lights. As i turn the running lights on they blow a plugin junction calls out... Easiest way is to just replace the wiring if it shows power and the running lights on trailer fuses. Most likely why your fuse is popping circuit in the truck and found that running. Now as soon as i turn the running lights on trailer blowing 20 amp fuse is sufficient... Tried them on ghe auto setting cause its light outside so they wont come on a better way prevent... Outside so they wont come on, no problem truck keeps blowing - Any thoughts minutes in, blew... May have been just a bad ground on trailer lights the stop lamps of! The page *... 20 amp fuses in my truck running lights did come on no... Prevent getting this page in the connetor seems that the # 15 - 20 amp fuse is.. Just replace the wiring inside the frame you will need to pull it out.... Some time the road, and 10 minutes in, it seems that the truck a. Truck and found that the truck keeps blowing fuses in my truck is most likely why your is... Stop lamps independent of the truck 's running lights on the trailer wo n't if lights. I still have brake lights and 4 ways and clearance lights is this just a bad light on trailer. Has a separate 20A fuse for trailer running lights keeps blowing - Any thoughts fuse...

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