DennyWells

I'm installing a brake controller for a recently purchased Caravan and need details on connection points (hopefully under the dash) of the FACTORY tow bar wiring harness. It seems pointless to run 2 wires all the way from the under dash mounted controller to the tow bar connector at the rear of the vehicle if there is a connector under the dash. If anyone has details of the factory wiring harness (specifically which connector has the brake signal and relevant pin for the electric brakes) I would really appreciate some help with this.