With Chevrolet's ignition switches, there are three colors to worry about for the primary wires to lead into them. There's a RED (10-gauge) wire for the battery, connecting the ignition switch to the alternator and fuse panel. Then, we have a PINK (12-gauge) wire, which is the default ignition wiring that leads to the ignition switch and fuse panel. Finally, there's a BROWN (12-gauge) wire which behaves as the accessory feed from the ignition switch to your in-car electrics.