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Coastal Lawn Maintenance
12-09-2010, 06:32 PM
I have a problem with the lights on my trailers one trailer only the brake light work and on the other the brake and running light work. When I hook up to the other truck all the lights work. I checked my fuses and I'm thinking it has to do with the seven way. Is there a way to check the seven way to make sure it working. Thanks in advance
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SouthSide Cutter
12-09-2010, 07:12 PM
You need to go to NAPA or some other automotive store and get a test light that looks like a ice pick. Ground it and stick your wires to find the problem. Then tape where you stuck it.

treadlite
12-11-2010, 12:26 AM
check you grounds on the trucks and trailers..... most trailer light problems that aren't immediately obvious (burnt out bulbs, broken wires etc) are usually a grounding problem....