Contents: Driver's door switch - removal and…⬇ Auxiliary motor - removal and…⬇ Rear Door Lock Modification -…⬇ Safety Switch and Relay - Removal…⬇
Figure 12.41. Components of the central door lock system: 1. Switch on the driver's door; 2. Safety switch; 3. Auxiliary motor (front door); 4. Auxiliary motor (back door); 5. Electrical wiring
1. The central locking system ensures, through the use of auxiliary motors and associated electrical wiring, that all passenger doors are locked automatically after the driver's door lock is locked. Locking or unlocking the driver's door, from the outside or inside, automatically unlocks or locks all other doors.
2. A special safety switch located under the dashboard unlocks all doors in the event of an accident or frontal collision.
3. If for any reason the central locking system does not work, all doors can still be unlocked and locked manually.
Driver's door switch - removal and installation
Figure 12.42. Removing the driver's door switch: 1. Central pin; 2. Electrical wiring plugs; 4. Transmission lever; 5. Contact plate; 6. Gasket; 7. Connecting elements
4. Remove the inner door trim panel (see Chapter 11). Remove the water shield around the switch.
5. Disconnect the electrical wiring plug from the switch - all plugs are different sizes, so it is impossible to connect them incorrectly.
6. Remove the center pin and screw that secures the switch to the door. Remove the switch components from the door by disconnecting the operating lever from the connecting elements.
7. Install the parts back in place by performing the above steps in reverse order. Before tightening the contact plate screw, place the plate halfway into the slot (see Figure 12.43). Check that the switch is working properly before installing the interior door trim panel.
Figure 12.43. Installing the driver's door switch: adjust the slot to the center position (indicated by the arrow) → A. Transmission lever; B. Gasket; C. Brown/white wire; D. Gray wire; E. Contact plate screw
Auxiliary motor - removal and installation
Figure 12.44. Removing the auxiliary motor from the door - the arrows indicate the mounting bolts
Figure 12.45. Location of auxiliary motors of the central locking system on the front door (top) and on the rear door (bottom) —Install the motors in the position indicated by the arrows
8. Remove the inner door trim panel (see Chapter 11). Remove part of the water shield to gain access to the motor.
9. Remove the two bolts that secure the motor to the door. Disconnect the mechanical connectors and electrical plug and remove the motor.
10. Reinstall by performing the above steps in reverse order. Use new self-locking special bolts, M6 x 8 mm, available from your GM dealer. Check for proper operation before reinstalling the door trim panel.
Rear Door Lock Modification - Hatchback since 1985
11. The rear door lock cylinder can be turned to one of three positions which affect the operation of the central locking system in relation to the rear door lock, as shown in Figure 12.46.
Figure 12.46. Rear door lock modification - central locking system A. Locked - the rear door can be opened without opening the central locking system; B. Unlocked - the rear door can only be opened when the central locking system is open; C. Independent position - the rear door can be opened even if the central locking system is locked. The button and key must be pressed to release the rear door lock. To remove the key, return it to position A or B after the rear door is opened
Safety Switch and Relay - Removal and Installation
12. Disconnect the battery.
13. Release the decorative clips that secure the side panel at the bottom of the driver's side using a wide-blade screwdriver.
14. Remove the panel, disconnect the wiring plugs and remove the circuit breaker or relay, depending on what is installed.
15. Installation is carried out by performing the above steps in reverse order.
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