Hello everyone Just wondering if it is possible to by pass it throught codes? or I have to do it with the switch? Reason to ask is because the switch is not really working inside my car, I tried a lot of bots and screws and seems that none is grounding.
You need to add a relay. 12v 30Amp 4 pin relay or even a 5 pin. 2 to ground (prong 86 & 87), 1 to remote (85), and the other to your parking brake wire from your head unit (30). Works every time no need for switch or toggle, a true bypass