IVA-D300 brake wire

[jltcat]

on a 99 GS Spyder which brake switch wire do you use to hook up a Alpine IVA-D300? There is a red constant 12v. a switched 12v green next to the red and two other green wires I cant seem to identify.

 

[biddybengbeng]

use a DMM to find the footbrake wire that rests at ground, and when you push the brake pedal, reads 12v. then get a toggle switch, run one side to ground, and the other to the parking brake lead on the d300. then to have the screen on while driving, just flip the switch, tap the footbrake, and you're in business or legally, run the parking brake wire to the parking brake. at the base of it there is one wire, you can't miss it. it reads ground when the p-brake is pulled up.