I have a toggle switch with a red and black wire. Which wires would I need to tap in to on the wire harness in order to bypass? I'm thinking that the light green wire would tie in to the negative wire on the switch and then ground both of them and then hook the red up to positive. Does this sound right anyone?

http://avic411.com/forum/viewtopic.php?t=17013

Ditch the switch, perform the bypass as per instructions

Yeah, you don't need a switch for the bypass. Just wire it up as per the directions and it will work all the time.

But if for some reason you want to disable the bypass you could put a switch on it. If it is a two pole switch, the positive and negative poles on the switch don't really mean anything as the signal can pass through the switch in either direction. All it does is close a circuit. Just wire the switch in on the parking brake wire and it's done. (green wire to switch, switch to ground) The red/black sides on the switch are inconsequential.