Forum Discussion
JRscooby
Jun 27, 2019Explorer II
ramyankee wrote:
Plug in the fifth wheel to the truck, turn on the lights and the fuse blows. The only lights that work are the turn signals and brake lights.
I will start by removing all the running lights, will then plug into the truck and begin plugging in each light one by one. Will this be a reasonable way to find where the short is?
Also, how would I find if it is maybe the wiring on the truck? I have two plugs, the bed mount for the 5th wheel and the bumper plug. Will add that I have no idea how long this has been an issue. When we would do the light check we would only really look for brake and signals and was always done during the day. Never have done any night driving..
BTW, IMHO, everybody that tows a RV should carry the flasher. If you need to unhook at the side of road you can bend the prongs a little to jump between "charge" and "Taillight" on the plug. This lets the trailer flash by itself...
Absolutely hate tracing shorts.
Thanks for any responses...
Get a 2 prong flasher, and a couple pieces of wire, use that to by-pass the fuse. This will make the lights flash and protect the wiring. (Cheap auto reset breaker) While lights are flashing look for the one or group that looks different. If all look same, problem is in TV, or between plug and where other lights branch off. If you have a AMP meter that reads when placed on wire, just follow the wire as the lights flash. When you pass the short, the needle will stop jumping, or start jumping the other direction. (Got to be careful. Sometimes the needle stops jumping because the meter is too far from wire...
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