Power Door Locks: Description
GM electric door lock system incorporates a solenoid for each door and a control switch for each front door, except Pontiac Firebird which has one instrument panel switch. All doors lock and unlock electrically from control switch, or manually from each door in the conventional manner.
Each solenoid has an internal circuit breaker which (under extreme conditions) may require up to three minutes to automatically reset. Wiring harness for the door lock system is routed in the power window harness conduit.