Key Interlock System
Key interlock system prevents ignition key from being removed from ignition lock assembly on steering column unless shift lever is in Park. Voltage is provided to key interlock switch from No. 25 fuse (20-amp) in engine compartment fuse box. When ignition key is in ignition lock assembly, key interlock switch closes, providing voltage to key interlock solenoid and interlock control unit.
If shift lever is not in Park, interlock control unit energizes key interlock solenoid by completing ground circuit. When key interlock solenoid is energized, ignition key cannot be removed from ignition lock assembly. Key interlock switch and solenoid are located on ignition lock assembly. See Fig 1. Interlock control unit is located behind left side of instrument panel, near kick panel.