Originally Posted by
alchymist
First guess - poor ground in trailer. Check the ground pin in the trailer side connector (plug) to be sure it's really grounded to the trailer frame and making good connection to the pin in the truck socket..
I actually just put a new plug on th trailer wire and sprayed out my plug on the bumper with contact cleaner. the lights and everything work like a champ its just the brakes that dont activate the controller.
Ive been thinking its the ground too because i was pulling my 5er the other day and it came on for a few minutes and worked just fine. then it started blinking off an on. this is starting to get old....