D4 Electric Trailer Brake Wiring
Need some help to work this out. Just bought a 2013 D4 with a Teknosha P2 and had to correct the wiring by adding a diode and getting the right outputs to the main 7 pin plug. But I now have a situation where the brake controller over ride works as expected, however putting the foot on the brake pedal gives no voltage from the BCM. Reset the car and no van connection and it works as expected. Connect the van & no go from the brake pedal.
I've checked with the IID tool & there's no faults.
Anyone got any ideas?
I'm thinking the diode isn't playing the game (yes it's installed the right way). All the wiring is done under the tail light, not inside.
Tomorrow I'll check the wiring inside the car.
Any ideas from the brains trust?