Trailer Wiring
I have the basic 4-wire plug on the rear on my RV, but there are 2 additional wires (a blue and a red) that aren't hooked to anything. Any idea where they would go? I'd like to wire a trailer brake ...
Forum Discussion
Keep in mind that even though it sounds like the wiring is already there, you may still have to install/insert the relay or fuse to activate. I know mine was ran but had to get the relay inserted in panel under dash to activate.
