Unlock Relay: Buick
- Lock all doors from arm rest switch. Connect test lamp between ground and Yellow wire at relay. If doors unlock, check door cylinder switch, switch ground, and wire to relay from switch.
- If doors do not unlock, check for power at Orange wire on relay. If no power, repair Orange wire. Connect test lamp to Black/Yellow wire and actuate lock cylinder switch. If test lamp lights, repair Black/Yellow wire to motor lock relay. If lamp does not light, replace relay.