I have a customer with a 09 passion and he had a battery disconnect installed at the local dealer. Because of the brakes locking up after the car
gets to around 25 mph so I ran a positive feed to his cig lighter that will feed his even brake, so I had to run a positive wire to what is called a icx board,which needs a brake feed from the stop light switch. So I ran another positive wire to the hot side of the stop light switch cut the hot wire added a diode for no feed back. He came to pick his car and r.v. and I thought I had it working but since I had the disconnect still on it worked. I didn't think about the disconnect being on the ground side of the battery. So now I will have to run separate grounds also..
Im just wandering if any of you smart car people who tow behind a r.v. have come across this situation with the wiring or if you had it done at a shop and how they wired it..
