Ok, I know I have to ground the parking brake, but what exactly does grounding involve. I don't deal with wires and don't trust myself to work on my car, but I'm willing to do this if it is simple.
i have that head unit....all you do is splice the blue wire to the black wire....then your good to go..
when your connect the black (ground) wire of your head unit, to the back wire thats already there (from your old head unit cnnection) just connect the blue wire with it