Brake controller in both car and on trailer - will it work or will I break somet

Thanks guys,

I have to tool around a bit with my setup as the reverse lights on the trailer were lighting up when I pressed the brake pedal. All other trailer lights worked.

So I turned both controllers right down to start with and got home ok. This was pretty safe as the trailer was largely empty, and the electric brakes were still kicking in even with both controllers turned right down. My biggest concern was that the brakes may be constantly "on" due to incorrect wiring, but just drove for a little while, checked the drums for heat, and found no probs.

So need to trace the wiring to figure out what is happening with lights - once I know that is right I'll play with the brake controllers to get it all right.

Thanks again.

Thanks LeighW

You were right. Blue wire (electric brakes) is not connected in the trailer's plug.