Odd 7 to 4 wiring problem
I've recently installed a brake controller on my RV as I'd planned to tow a trailer. I have confirmed it's working with a 7 pin LED tester. Now I'm flat towing a car and I just want marker/brake l...
Forum Discussion
gijoecam wrote:
Maybe I'm mis-reading something... But the 7-pin connector is showing a left turn, a right turn, and BOTH when the brake is applied, right? There is (or should be) no separate BRAKE signal on a standard 7-pin adapter, and if there is, somebody has it wired wrong.
My 7 pin tester looks similar to the link in post 5 above, it has a separate brake signal (middle bottom row) however that's the trailer brake power signal (blue). I was assuming the blue trailer brake wire would also be used for any 7 pin trailers brake lights as well as the brakes themselves. So when the turn signal lights on the tester didn't come on but the brake signal did I didn't see that as a problem.
I see now from tailer wiring diagrams that that wouldn't be the case and the 3 to 2 adapter should be wired upstream of the RV's 7 pin trailer connecter regardless of trailer/car type being towed.
