I own an 05' w/o big trailer package. I hooked up an Interceptor brake controller with a Nissan connector harness to the brake controller's 4 bare wires. (I bought this five wire Nissan harness directly from my Nissan dealer for $16). One end has a fancy plug which connected directly into the truck's connector under the steering wheel). The other end has five bare wires which go to the brake controller; four of which I connected to the brake controller. One blue/red wire left alone.
All other lights and brakes work perfectly, except I can't turn on the interior lights of the trailer. Trailer dealer assured me they worked when they plugged it to their Dodge truck before delivery. There is one wire on the Nissan harness which is left empty (blue/red) which the owner's manual says goes to the Illuminate the Brake Controller). I'm wondering if this goes anywhere else?
I'm told by the trailer dealer that the interior lights of the trailer should work when I turn on the parking lights of the truck. I've tried every combination w/o success.
Can anyone help me getting the interior trailer operational?