BFL13 wrote:
Some brake controllers have an "adapter" wire set needed, which is different for each brand of truck. No idea if this is the case here, but OP went from Ford to GMC.
GM stopped providing a plug a number of years ago and just provided some "cut" wires under the dash. I phoned Tekonsha to ask them. I still had the adapter plug with wire connectors at one end from when we bought the P3 two trucks and 7 years ago.
The P3 is all properly wiring according to the color coding. I did verify correct voltage from the brake pedal when depressed. I think what I need to do is solve first is why I'm only seeing 10 volts when I pull the breakaway pin.
It's raining hard today here and not to keen on crawling under the trailer today. Will at least go get a new truck battery. :(
