Exterior Lighting Module: Testing and Inspection
Exterior LightsControl Unit Input Test
1. Before testing the exterior light control functions, troubleshoot the multiplex control system.
[1][2]Multiplex Control Unit, Driver's:
2. Remove the driver's [1][2]multiplex control unit from the driver's under-dash fuse/relay box.
3. Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 4.
4. With the driver's [1][2]multiplex control unit still disconnected, make these input tests at the connector or driver's under-dash fuse/relay box socket.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 5.
5. Reconnect the driver's [1][2]multiplex control unit to the driver's under-dash fuse/relay box, and perform the following input tests at the appropriate connectors on the driver's under-dash fuse/relay box. For driver's under-dash fuse/relay box connector socket location.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 6.
[1][2]Multiplex Control Unit, Door:
6. Remove the driver's door panel, and disconnect the 20P connector from the door [1][2]multiplex control unit.
7. Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 8.
8. Reconnect the connector to the door [1][2]multiplex control unit, and make these input tests.
- If a test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the control unit must be faulty; replace it.