Attachment III - Technical Information

OVERVIEW

This procedure will instruct you to replace the brake lamp switch jumper harness on all affected vehicles. You will also be instructed to remove and inspect the brake lamp switch for heat-related damage. If damage is found, the switch must be replaced. A damaged brake lamp switch may cause any of the following conditions to occur:

^ Inoperative brake lights (switch stays "open").

^ Brake lights staying on continuously (switch shorted or stays "closed").

^ Cannot shift out of PARK (open circuit).

^ Speed control will not switch off when brake pedal is depressed.

^ Speed control will not activate.

^ Discharged battery.

SERVICE PROCEDURE

1. Install a memory saver and disconnect the battery negative cable.





2. From under the instrument panel, disconnect and remove the brake lamp switch. See Figure 1.

3. Inspect the switch for any heat-related damage (discoloration, melted or burnt plastic) near the connector.

4. Disconnect the brake lamp jumper harness from the other switches and the main harness.

5. Destroy and discard the harness.

6. If inspection of the switch did not reveal any heat-related damage, reinstall the switch. If damage is found, install a new switch.

7. Install a new jumper harness.

8. Connect the battery negative cable and remove the memory saver.

9. Check brake lamp operation.