I just bought the Pioneer AVH-P4000dvd and have some question about hooking up the relay. we use a regular relay 85 and 87 = ground. 86 = Decks Remote turn on wire. 30 = parking brake wire from deck.<br> My question is if the remote turn on wire (86) still needs to be ran into your main wiring also? And same goes for the parking brake wire. I provided an illustration to show you what I mean. The question mark wires are the ones I'm not sure of.<br> Second question, is if a relay "socket" is the same as a regular relay? Will this one work.