Trailer Lights Work On One Vehicle But Not Another
Question:
I checked the trailer lights by hooking the trailer up to another vehicle and they worked but only the tail, turn and side markers work when I hook them to the VW.
asked by: Dan F
Helpful Expert Reply:
It sounds like the problem is either on the connector or on your VW.
First, you will need to have someone help you test your connector. Using a circuit tester like part # PTW2993, you will want to test each pin on the vehicle connector for function to make sure you are receiving a signal.
Check for any corrosion in the harness. Any corrosion can cause problems on a wiring circuit. Make sure the ground wire is securely fastened to a clean, bare metal surface.
If everything checks out on the VW wiring side, then you will want to check out the connector on the trailer side for corrosion or ground issues.
I have attached a couple of helpful articles you can check out.
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Nick B.
6/9/2020
One of My work trailers lights don’t work behind 2 of my company trucks but do behind the other 2. The 2 trucks that this trailer doesn’t work behind have no problem with the other 4 trailers. Please help