Trailer Brake Controller

if you can't find the switch. run a wire from the power side of the brake lights forward to the controller

Is the brake light switch on the master cylinder on the 76?

I have a 76 1ton sitting out back. I always wanted to intall the body on my Dodge PW frame til I looked at all the work.

T_Bone

I don't think you should tie into the wire that goes to the proportioning valve. I think that one only grounds a circuit that lights a dash "BRAKE" indicator that signals a failure of the front or rear hydraulic system. Nothing to do with your normal rear brake lights.

Rod

I recently installed a Prodigy in my truck. I could see the brake switch but could not get at the darned thing without tearing a lot of stuff out of the way. Of course the wires from it disappear into a wiring harness almost immediately :o). I was able to locate the cold side wire (the one that goes to the rear brake lights) and connect into that under the carpet near the drivers seat. A wiring diagram certainly helps. Without one, you may have to go all the way to the rear brake lights to find the right one and wire forward from there.

You'll like your Prodigy. It works great. I was thinking about a different controller until I posted here a while back. The responses I got convinced me to change my mind and go with the Prodigy. I am glad I did.

Rod

Rich