Originally Posted by Lennyp04
Hey guys, the rear brake/turn light on my 07 trailer isn't working properly. It lights up with the running lights and shows that it has power but does not indicate braking or turning. I'm guessing that its wiring or possibly a grounding issue but wanted to get your guys input. Thanks!
I doubt it is a grounding issue since the ground is working for the running lights. Test the plug with a multimeter or test light and see if you are getting 12v on the brake pin. If you don't, follow the wire and find the problem.
Make sure your vehicle is putting 12v on the correct pin at the trailer/vehicle connection.