Trailer light problem.

[zapj]

My home built Weekender will be 11years old this July. About 4 months ago I noticed when using turn signals while headlights are on will cause a dim blinking on the opposite side the turn indicator. Figuring a grounding problem I have checked every splice and installed quick splice connectors in place of the twisted wire and tape method. At the time of building I used a common white ground for all lights so each one would not have its separate ground eliminating the problem I'm currently having. I have went through the whole system from the 4 pin plug to the furthest light. I hoping someone can give me an idea as to what else to check on a system that has been reliable for 10 years. Oh yes, I pulled the bulbs out of the stop/turn fixtures and cleaned the sockets but have not done the same for the side clearance lights.

Thanks

[saltydawg]

Do you have a 4 to 3 wire converter?

Other wise I would also guess the ground, check the tv side.Take a jumper wire from the trailer wiring to the tv, to eliminate the ground connections with the wiring harness and 4 wire plug. If this stops it your not getting a good ground from the triler ground to the tv ground. Remember you have 3 wires feeding power to the trailer but only one going back, the common wire ( ground )is the common denominator here.

[zapj]

Thank you for the suggestion I'll try tomorrow with the jumper wire. I am at a loss and running out of ideas. I'm sure it has to be in the trailer wiring harness because I have used this vehicle to pull two other trailers recently and the lights work correctly. I also have a Casita that i pull with another vehicle but it has a 7 pin. I'll use my 7 to 4 adapter on the Weekender tomorrow also just to eliminate another probable. The trailer is kept inside an enclosed shed so weather should not be a factor for the harness connector. I'm not trying to shootdown ideas just giving info of things so others may process and maybe suggest something I've missed.

Thanks

[S. Heisley]

When this happened to me, it was the controller on the tow vehicle.