Most wiring issues can be addressed with a 12v
test light and a lot of patience.
In some cases, it may even be necessary to rearrange wires in the plug. Your back-up light working with the blinker makes me suspect you may have this problem.
Start at the beginning (TV) and work your way back. (I wish I could remember the colors now, as I just did this on my Sovereign
not too long ago. I think green is tail lights, brown is left, and red is right, black is back-up, blue is 12v
, white is ground, and I can't remember brakes)
Unplug the umbilical cord at the trailer end and check each circuit to make sure you have voltage through the cord.
Next, remove the 12volt cover at the front wall of the trailer (backside of the umbilical cord). The big red wire in the center is your 12v from TV. The big white is ground, the green is tail lights/running lights, brown is left, red is right (or vise versa), yellow is brakes (I think), black is back-up.
(You can verify all of this yourself with a test light!)
I would be very suspect of your ground on the tail lights because of how much trouble I've had with them myself. I finally removed the housings on this one and replaced all four cans
. Best thing I ever did. I drilled a 1/2" hole in the back for the fiber optics. (I also replaced every single running light, 5 red, 7 amber, $1.99 a piece at a trucking supply place). Anyway, a bad ground will really mess with your mind!
When I finished, everything (I mean everything) worked perfectly!!
If you're patient and work methodically, you'll get it!