Diagnostic Aids
| • | If the power mirror system fuse is open and a short to ground in the battery positive voltage circuit is not detected, the fault could be a short to ground in one of the power mirror control circuits. This would open the power mirror system fuse when the mirror switch is pressed. |
| • | If both power mirrors are inoperative on one or more axis, the most probable cause is a power mirror switch failure. However the fault could be an open circuit on two or more of the power mirror control circuits. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
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This step tests the integrity of both the mirror control circuits and the power mirror switch. If both power mirrors are inoperative on one or more axis, begin testing by disconnecting one of the power mirrors, if an open circuit is detected and repaired for that power mirror, repeat step 6 for the other power mirror.
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This step tests the integrity of the battery positive voltage circuit not the fuse.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Outside Rearview Mirror Schematics Connector End View Reference: Master Electrical Component List | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Do both power mirrors operate properly? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 | Are both the left and right power mirrors completely inoperative? | Go to Step 4 | Go to Step 6 |
4 |
Does the test lamp illuminate? | Go to Step 5 | Go to Step 7 |
5 | Connect a test lamp between the battery positive voltage circuit of the power mirror switch harness connector and the ground circuit of the power mirror switch harness connector. Does the test lamp illuminate? | Go to Step 9 | Go to Step 15 |
Does the test lamp illuminate in both directions? | Go to Step 12 | Go to Step 8 | |
Test the battery positive voltage circuit of the power mirror switch for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | Go to Step 18 | Go to Step 9 | |
8 | Test the mirror motor control circuits for an open. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | Go to Step 18 | Go to Step 9 |
9 |
Did the test lamp illuminate at any of the power mirror motor control circuits? | Go to Step 13 | Go to Step 10 |
10 | Probe each of the power mirror motor control circuits of the power mirror switch harness connector with a test lamp that is connected to ground. Did the test lamp illuminate at any of the power mirror motor control circuits? | Go to Step 14 | Go to Step 11 |
11 | Inspect for poor connections at the harness connector of the power mirror switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | Go to Step 18 | Go to Step 16 |
12 | Inspect for poor connections at the harness connector of the power mirror motors. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | Go to Step 18 | Go to Step 17 |
13 | Repair the short to ground in the power mirror motor control circuits. Refer to Wiring Repairs. Did you complete the repair? | Go to Step 18 | -- |
14 | Repair the short to battery positive voltage in the power mirror motor control circuits. Refer to Wiring Repairs. Did you complete the repair? | Go to Step 18 | -- |
15 | Repair the open in the power mirror switch ground circuit. Refer to Wiring Repairs. Did you complete the repair? | Go to Step 18 | -- |
16 | Replace the power mirror switch. Refer to Power Mirror Switch Replacement. Did you complete the replacement? | Go to Step 18 | -- |
17 | Replace the power mirror motor. Refer to Outside Rearview Mirror Motor Replacement. Did you complete the replacement? | Go to Step 18 | -- |
18 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
