Trailer running lights not working
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Trailer running lights not working
A little background information is that I was towing a large gooseneck trailer about a year ago when half way to the destination the lights quit. Not just the trailer but the truck tail lights, turn signals and everything except the headlights. Well after getting there and unplugging everything it stayed the same. Well on the way home without the trailer the lights began working again. All the truck lights acted as it never happened. No blown fuses or anything.
Well things are are going ok since then but I can never get running lights to any of my 3 trailers to work. Turns and brake lights are fine. What gives? All the fuses are fine and the truck running lights work just fine. One thing I have noticed is that on my horse trailer I have the little led lights on the sides operational... I would have assumed these to be the same as the tail running lights. Hmmm
Any thoughts or help would be great. It's only a matter of time before I get pulled over for no trailer running lights...
Well things are are going ok since then but I can never get running lights to any of my 3 trailers to work. Turns and brake lights are fine. What gives? All the fuses are fine and the truck running lights work just fine. One thing I have noticed is that on my horse trailer I have the little led lights on the sides operational... I would have assumed these to be the same as the tail running lights. Hmmm
Any thoughts or help would be great. It's only a matter of time before I get pulled over for no trailer running lights...
Senior User
Joined: Oct 2011
Posts: 398
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From: Nova Scotia, Canada
I had issues with my trailer running lights (clearance lights) blowing sometimes on my truck, PO had a larger fuse in the slot. I found a partially bare wire in the wiring harness near the spare tire.
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That's a good thing to check but for me I don't have any issues with blown fuses and they are the right size. I'll check around the spare because that could be a common wear point. Any relays I should check out or replace?
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