Test A: Power Mirror Inoperative
- Before beginning diagnostic procedure, review Power MirrorDESCRIPTION & OPERATION
. Go to next step.
- Place mirror selector switch in left mirror position. Operate mirror position switch in up, down, left and right directions and note operation. Place mirror selector switch in right mirror position and operate in all directions. If both mirrors operated properly, check for and correct intermittent problem. If power mirrors did not function properly, go to next step.
- If both left and right mirrors are completely inoperative, go to next step. If both mirrors are not completely inoperative, go to step 6
.
- Disconnect power mirror switch. Using test lamp connected to ground, probe battery positive voltage circuit (Orange wire) of power mirror switch connector. If test lamp illuminates, go to next step. If test lamp does not illuminate, go to step 7
.
- Connect test lamp between battery positive voltage circuit (Orange wire) and ground circuit (Black wire) of power mirror switch harness connector. If test lamp illuminates, go to step 9
. If test lamp does not illuminate, go to step 15
.
- Disconnect inoperative power mirror. Connect test lamp between appropriate mirror motor control circuits of power mirror harness connector. See WIRING DIAGRAMS
. Place mirror selector switch to mirror to be tested. Operate mirror switch in both directions for functions being tested. If test lamp illuminates in both directions, go to step 12
. If test lamp does not illuminate in both directions, go to step 8
.
- Test battery positive voltage circuit (Orange wire) of power mirror switch for short to ground or open. If problem was found, repair as necessary and then go to step 18
. If problem was not found, go to step 9
.
- Test mirror control circuits for open wires. If problem is found, repair as necessary and then go to step 18
. If problem was not found, go to next step.
- If power mirror was previously disconnected, reconnect power mirror connector. Disconnect power mirror switch connector. Probe each power control circuit of power mirror switch harness connector with test lamp connected to battery positive voltage. See WIRING DIAGRAMS
. If test lamp illuminated at any of mirror control circuits, go to step 13
. If test lamp did not illuminate, go to next step.
- Using test lamp connected to ground, probe each of power mirror motor control circuits of power mirror switch harness connector. If test lamp illuminated at any of mirror motor control circuits, go to step 14
. If test lamp did not illuminate, go to next step.
- Inspect for poor connection at harness connector of power mirror switch. . If problem was found, repair as necessary and then go to step 18
. If problem was not found, go to step 16
.
- Inspect for poor connections at harness connector of power mirror. If problem is found, repair as necessary and then go to step 18
. If problem is not found, go to step 17
.
- Repair short to ground in power mirror motor control circuit (Orange wire). After completing repair, go to step 16
.
- Repair short to voltage in power mirror motor control circuits. After completing repair, go to step 18
.
- Repair open in power mirror switch ground circuit (Black wire). After completing repair, go to step 18
.
- Replace power mirror switch. After completing repair, go to step 18
.
- Replace power mirror. After completing repair, go to next step.
- Operate system in order to verify repair.
Courtesy of GENERAL MOTORS CORP.
Courtesy of GENERAL MOTORS CORP.