Locks: Testing and Inspection

Central Locking

Fault Tracing

1. Check the fuses. Check the voltage supply to control unit (175) pin 4. This pin should always be live.

2. Check that pin 7 of the control unit (175) is live when the door key is in the unlock position. Check that pin 8 of the control unit (175) is live when the key is in the unlock position.

CAUTION! The lock motors should only be tested through pin 7 and pin 8 of the control unit (175). Do not 'bench test' the lock motors using any other power supply sources as this may overload and damage the motors.

NOTE: When testing pin 7 and pin 8, the supply will only be live for approximately 1 second.