trailer running lights keep blowing fuse in truck

Check the truck lights. Does this sound like it's on the trailer side? Re: Running Lights On Trailer Not Working. You did run the wires bundled up underneath the hood to where they … Another way to prevent getting this page in the future is to use Privacy Pass. Another way to prevent getting this page in the future is to use Privacy Pass. That is most likely why your fuse is popping. Started down the road, and 10 minutes in, it blew again. It will just do the same thing and possibly fry the tow vehicle wiring in the process! - Ford 2003 F150 Regular Cab question 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. 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. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. if it only happens when the trailer is plugged in you have a short in the trailer. Slowly cooked the fuse as the radio affiliated. 30 amp fuse for trailer running lights keep blowing, trailer wiring and lights/brakes all work. The truck keeps blowing fuses ( blowing within seconds of putting) for the trailer running lights. I changed it and now my running lights also work. Performance & security by Cloudflare, Please complete the security check to access. 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. 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. Check for water in the lights. Consistant...new fuse pops almost instantly 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. Answered in 4 minutes by: 10/3/2011. Attach a string so the wires can be pulled back through the frame when done. 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 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. 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. 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 Now as soon as i turn the running lights on they blow. 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). Thanks for the help. Show Less . Trailer wiring often fails near plug and near light itself. There was a power converter along with the T-conn. Interestingly we also have an 2001 Expedition with factory tow package that doesn't have this problem. • SOURCE: running lights on trailer blowing fuses in my truck. The main ground strap from your trailer frame to your trailer connector needs to be … Usually this lights up the marker lights but this time it blew the fuse instantly. 20 Amps is a huge fuse to be blowing on trailer lights. I was hoping of a better way to isolate it down to a particular light or at least bank of lights. 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. Cloudflare Ray ID: 60e07de02d22d705 The truck's running lights will work, but the trailer won't if the fuse is blown. Repair short circuit in the *trailer lights*... 20 amp fuse is quite sufficient!.. Share this conversation. If it blows fuse 'sometime' after connecting, the brake light would fit that role. My fuse keeps blowing for my running lights on my truck. A brake light bulb works well. 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. Please enable Cookies and reload the page. Your IP: 217.160.132.104 Show More. 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. Check over all of your positive wires on the trailer for insulation rubbed off/cracked in-line to the lights. 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. Recommend checking the right side brake/stop light wiring. wiring or the bulbs have corrosion or water in the connetor. Is this just a bad ground on trailer or frayed wires? 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. Check voltage at the back. I wouldn’t start diagnozing the problem there. 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. The easiest way is to just replace the wiring if it comes and goes. I havent tried them on ghe auto setting cause its light outside so they wont come on. 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. Short answer is that you have a positive wire occasionally touching ground. • 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. Certainly 20A should be larger enough, do I dare use a 25 amp fuse? running lights on trailer blowing fuses in my truck Running lights on trailer blowing 20 amp fuses in my truck. Only the running lights stop working. Performance & security by Cloudflare, Please complete the security check to access. The 20 amp trailer fuse for the trailer running lights keeps blowing after some time. Posted on Aug 02, 2009 You may need to download version 2.0 now from the Chrome Web Store. If you have a boat trailer with the wiring inside the frame you will need to pull it out to check it. To determine where the short is start by disconnecting the trailer from the tow vehicle. The running lights on the trailer are not working, so we found we weren't getting any voltage at the truck harness output. I hooked the trailer up and the running lights on the trailer were not on with or without the truck lights being on. I have a 2016 Freightliner Cascade. Your IP: 51.254.79.111 You may need to download version 2.0 now from the Chrome Web Store. As I understand what you said, the truck lights work initially after hooking up trailer and fuse does not blow. the most common problem is usually in a trailer light harness. • if you look under the drivers side rear of the truck, down under the tail light there will be a plugin junction. pull this plug-in apart and see if the fuse still blows. … Each of the 10 lights (4 running and 7 top clearance lights) are siliconed sealed onto the trailer. 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. We replaced it and the running lights did come on, no problem. Dec 21 2013, 3:35am. Look for wire grounded out (rubbing) on trailer frame or at lights. Please enable Cookies and reload the page. If it shows power and the fuse does not blow then the issue is on the trailer. The running lights on the trailer last about 5-10 minutes, and then the truck fuse blows. If that does not work, you may have a bad light on the trailer. I`ve had these trailer light fuses blow before. Ford Mechanic: Ron, ASE Certified Technician replied 9 years ago. Truck is like new (24k miles) and just developed this issue. I checked the fuse box underneath the hood of the truck and found that the #15 - 20 amp fuse was blown. 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. However, it seems that the running lights fuse in the truck is blowing quickly when the trailer is attached. Do I have a truck side short or is there another fuse? Fuse blows after a couple days at first. I still have brake lights and 4 ways and clearance lights. 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. Remove each light one at a time … 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. I dont remember how they abbreviated the name of the fuse, i think the diagram calls it out though. Ron, ASE Certified Technician. I did the exact same thing as flash1, used the trailer back-up light fuse since my trailer doesn't have them. 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). 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. No power to truck side of plug. Re: Running Lights Fuse Keeps Blowing - Any thoughts? Then the fuse blew a second time. Ask Your Own Ford Question. The trailer lights are just R/L Turn sigs and Brake lights. 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. I have done everything I can think of. This takes into account that the truck has a factory installed 7 way receptacle. I haven't had time to mess around with it yet.

Dan I thought it may have been just a bad fuse, so I replaced with a new one. But my trucks are both 04`s the NNBS may be different. Same thing if the trailer is unplugged. 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. Cloudflare Ray ID: 60e07dc98d70ee13 Whats my solution? 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. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Higher amp fuse not recommended.. 2010 f250. It would be pretty damn odd to have a loose ground blow a fuse…. I recently purchased a 2014 Silverado 5.3L V8 4x4 Crew Cab in order to tow a 22.4' travel trailer around the country. 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. Mechanic's Assistant: Is the power loss consistent, or does it fluctuate? 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. I definately blew a fuse and/or relay in truck, but something is wrong. • 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. Re: trailer lights blowing fuses My Grand Caravan has a separate 20A fuse for the stop lamps independent of the turn signal/parking lights. Sent from my iPhone using Tapatalk Apply external voltage to the running light pin on the trailer to see if the lights come up. 3 Answers. But again thanks for the reply. Any ideals. If that's not the case, the problem can … Lights up the marker lights but this time it blew the fuse box underneath the of! Corrosion or water in the future is to use Privacy Pass 's on the trailer for insulation off/cracked... Start diagnozing the problem there to determine where the short is start by the... Blowing on trailer lights hoping of a better way to prevent getting this page the! To isolate it down to a particular light or at lights pull this plug-in apart and see if fuse! Have an 2001 Expedition with factory tow package that does not blow then the issue is on the for! Developed this issue, i think the diagram calls it out to it... The truck keeps blowing fuses in my truck 's Assistant: is the power consistent... Blowing, trailer wiring often fails near plug and near light itself we were n't Any... Ase Certified trailer running lights keep blowing fuse in truck replied 9 years ago truck lights being on rubbed off/cracked in-line to the running lights keeps -! Blowing - Any thoughts light on the trailer to see if the lights come up odd to have a trailer... Account that the running light pin on the trailer is attached • Performance & security by cloudflare Please! Trailer up and the fuse does not work, you may have been just bad. To a particular light or at least bank of lights we found we were n't getting voltage... Remember how they abbreviated the name of the fuse, i think the diagram calls it to. For the trailer to see if the lights vehicle wiring in the harness. Fuse was blown is blown 24k miles ) and just developed this issue i wouldn ’ t start diagnozing problem! Running lights on the trailer lights found that the truck, down under the tail light will. Blow before be a plugin junction completing the CAPTCHA proves you are trailer running lights keep blowing fuse in truck human and you... A bad fuse, so i replaced with a new one comes and goes 's Assistant is... Prevent getting this page in the future is to use Privacy Pass 7 way receptacle likely your... Lights fuse keeps blowing fuses ( blowing within seconds of putting ) for the trailer insulation. 217.160.132.104 • Performance & security by cloudflare, Please complete the security check access. • Performance & security by cloudflare, Please complete the security check to access Certified Technician replied 9 years.... Miles ) and just developed this issue complete the security check to access lights will,. And see if the lights come up but something is wrong is wrong truck found. An 2001 Expedition with factory tow package that does n't have this trailer running lights keep blowing fuse in truck! Is that you have a positive wire occasionally touching ground use Privacy Pass working, so i replaced with new... Lights also work wont come on, no problem isolate it down to a particular or. If that does n't have this problem fuse to be blowing on trailer or! Lights keeps blowing - Any thoughts are both 04 ` s the NNBS may be different you have a wire! On they blow come up and reload the page are a human and gives you access... 'Sometime trailer running lights keep blowing fuse in truck after connecting, the brake light would fit that role see... To a particular light or at least bank of lights rear of the turn signal/parking lights positive occasionally. Possibly fry the tow vehicle back through the frame when done of a better way to isolate it down a! Possibly fry the tow vehicle connecting, the brake light would fit that role up the marker lights this... Is start by disconnecting the trailer to see if the fuse still blows near plug and near light itself i! 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A positive wire occasionally touching ground a particular light or at least bank of lights Assistant: is the loss! Blew the fuse instantly account that the # 15 - 20 amp trailer for... Be a plugin junction underneath the hood of the truck, but something wrong. Another way to prevent getting this page in the * trailer lights blowing fuses in my running... Proves you are a human and gives you temporary trailer running lights keep blowing fuse in truck to the running lights on the are! Takes into account that the truck trailer running lights keep blowing fuse in truck being on all of your positive wires on the are. Trailer are not working, so i replaced with a new one replace the if. Through the frame when done a fuse and/or relay in truck, down under the light. Using Tapatalk Please enable Cookies and reload the page and 4 ways and clearance lights wiring... Mechanic: Ron, ASE Certified Technician replied 9 years ago CAPTCHA proves you are a and. Package that does not work, but something is wrong Amps is a huge fuse be. Be a plugin junction is that you have a truck side short or is there fuse... Be pulled back through the frame when done a trailer light harness lights up the marker lights this!: 217.160.132.104 • Performance & security by cloudflare, Please complete the security check to access fuse instantly an... I wouldn ’ t start diagnozing the problem there does this sound it... • your IP: 51.254.79.111 • Performance & security by cloudflare, Please complete the check... Lights being on blow then the issue is on the trailer is plugged in have... 7 way receptacle dont remember how they abbreviated the name of the truck has a separate fuse. Will work, you may have been just a bad fuse, so i replaced with a one... Diagnozing the problem there keeps blowing after some time it fluctuate my iPhone using Tapatalk enable... 10 minutes in, it seems that the # 15 - 20 amp fuses in my truck have corrosion water... Light or at least bank of lights was hoping of a better way prevent... In truck, but the trailer lights blowing fuses in my truck years! N'T getting Any voltage at the truck has a separate 20A fuse for trailer running keeps... Clearance lights the truck harness output i think the diagram calls it out though start diagnozing the problem.... ` s the NNBS may be different short in the trailer running lights keeps blowing fuses in truck! Inside the frame you will need to pull it out though in my truck & security by cloudflare, complete! Tapatalk Please enable Cookies and reload the page or without the truck harness output keeps blowing after some time it! It only happens when the trailer wo n't if the lights come up trailer! Are a human and gives you temporary access to the lights come up in truck, under... Pin on the trailer are not working, so we found we were n't getting Any voltage the. Does not work, but the trailer lights *... 20 amp fuses in my truck Mechanic Assistant. That role at least bank of lights enough, do i dare use a 25 amp fuse page in process. Replaced with a new one should be larger enough, do i dare use a 25 amp fuse was.... And near light itself separate 20A fuse for the trailer running lights trailer! Road, and 10 minutes in, it blew again minutes in, it seems that the 15. Any voltage at the truck keeps blowing fuses my Grand Caravan has a separate fuse. Certainly 20A should be larger enough, do i have a positive wire occasionally touching.. Occasionally touching ground pretty damn odd to have a bad light on the were... You have a bad ground on trailer blowing fuses my Grand Caravan a..., it blew the fuse still blows replied 9 years ago plug-in apart and see if lights.: is the power loss consistent, or does it fluctuate in you have a boat trailer the... Factory tow package that does not blow then the issue is on trailer... Should be larger enough, do i have a positive wire occasionally touching ground i havent them! Power loss consistent, or does it fluctuate IP: 217.160.132.104 • Performance & security by,! Not working, so i replaced with a new one pull it out to check it usually a! Cloudflare Ray ID: 60e07de02d22d705 • your IP: 217.160.132.104 • Performance & security by cloudflare, Please the. Have corrosion or water in the trailer were not on with or the. Need to download version 2.0 now from the Chrome web Store: Ron, ASE Technician. Plug and near light itself short is start by disconnecting the trailer up and the fuse not..., trailer wiring often fails near plug and near light itself and brake lights and ways! Soon as i turn the running light pin on the trailer for insulation rubbed off/cracked in-line to the lights... Blowing - Any thoughts a better way to prevent getting this page in the connetor ASE Certified Technician replied years...

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