GMC TRUCK BRAKE WIRING
Trailer Brakes Not Working - gm-trucks
May 21, 2016Nothing helped and the truck would continually cycle the messages "CTW" "trailer connected constantly. I finally gave up and took the trailer up to my RV dealer who is great. The tech I crawled under the trailer and went immediately for the trailer brake wiring. He found a pinched wire where the bundle was attached to the axle.Picked up my TT with my new truck for its first tow and the trailer brakes aren't working. The DIC says "SERVICE TRAILER BRAKE SYSTEM". The manual..Check you fuse under the hoodI wound up replacing the trailer electrical cord. Do all of the lights operate as they should, turn signals and all?All the lights work as they should. I will check fuse tonight when I get home. It's raining now, so it'll have to wait. I think I am going to call..Took my truck to my local RV dealer, and per their test machine, everything is operating per normal on the truck, including the brakes. We were abl..SouthpawHD, my travel trailer had a Bargman molded 7 plug and it was not a tight connection on my 2015, but was on my 2009. I have replaced it with..That's great info, thanks!!! I will order one right away as that's still cheaper than taking my trailer in for a check. Edit: on second thought, si..had same problem, make sure plug is all the way in with the cover latching bottom of plug. Otherwise plug is loose causing service trailerWe get this with built in brake controls and high end aftermarket systems. 99% of the time there is a cooked magnet or shorted wire inside one of t..SouthpawHD, towed my travel trailer about 150 miles to campground yesterday and had zero issues.Service Trailer Brake System ProblemAug 03, 2018"Service Trailer brake" Warning in DICSep 03, 2015See more results
Trailer brake wiring issue | Chevy Truck Forum | GMC Truck
Sep 05, 2018I pulled over and the brakes were smoking on the trailer. After checking everything, I discovered the brakes are staying on when the truck's lights are on, then the brakes don't work at all with no lights. I was able to get it to an RV center where testing showed the issue is in my truck's wiring.