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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 685 (Door System, Mirror System & Window System) >> Diagnostic Information and Procedures >> Power Mirrors Inoperative (Escalade Only) >> Test Description

Test Description

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  1. 4:  This step tests the integrity of the battery positive voltage circuit not the fuse.
  2. 8:  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 8 for the other power mirror.
Power Mirrors Inoperative (Escalade Only)

Step Action Yes No
Schematic Reference:  Outside Mirror Schematics  
1 Did you perform the Door Systems Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Door Systems 
2
  1. Place the mirror select switch in the left mirror position.
  2. Activate the mirror position switch in the UP, DOWN, LEFT and RIGHT directions and note the operation.
  3. Place the mirror select switch in the right mirror position.
  4. Activate the mirror position switch in the UP, DOWN, LEFT and RIGHT directions and note the operation.
Do both power mirrors operate properly?		 Go to TESTING FOR INTERMITTENT AND POOR CONNECTIONS Go to Step 3 
3
  1. Install a scan tool.
  2. Monitor the mirror switch data parameter.
  3. Activate the mirror select switch to the left mirror position.
  4. Activate the mirror position switch to the UP, DOWN, LEFT and RIGHT positions.
  5. Activate the mirror select switch to the right mirror position.
  6. Activate the mirror position switch to the UP, DOWN, LEFT and RIGHT positions.
Does the mirror data parameter change with the corresponding switch activations?		 Go to Step 7  Go to Step 4 
4 
  1. Disconnect the power mirror switch.
  2. Connect a test lamp to good ground.
  3. Probe the battery positive voltage circuit at the power mirror switch harness connector.
Does the test lamp illuminate?		 Go to Step 5  Go to Step 14 
5 Connect the test lamp between the battery positive voltage and the ground circuits at the power mirror switch harness connector.
Does the test lamp illuminate?		 Go to Step 6  Go to Step 15 
6
  1. Connect the power mirror switch.
  2. Disconnect the memory control module.
  3. Connect a test lamp to a good ground.
  4. Probe each mirror signal circuit, one at a time, while activating the corresponding power mirror switch.
Did the test lamp illuminate with each switch activation?		 Go to Step 7  Go to Step 9 
7
  1. Connect the memory control module if previously disconnected.
  2. With the scan tool command the inoperative mirror(s) UP, DOWN, LEFT and RIGHT.
Do the mirror(s) move with the corresponding scan tool command?		 Go to Step 13  Go to Step 8 
8 
  1. Disconnect the inoperative mirror(s).
  2. Connect a test lamp to a good ground.
  3. Probe each mirror control circuit, one at a time, while commanding the mirror UP, DOWN. LEFT and RIGHT.
Does the test lamp illuminate with each corresponding scan tool command?		 Go to Step 12  Go to Step 10 
9 Test for and open or short to ground or battery in the appropriate mirror signal circuit(s). Refer to CIRCUIT TESTING and WIRING REPAIRS .
Did you find and correct the condition?		 Go to Step 19  Go to Step 11 
10 Test for and open or short to ground or battery in the appropriate mirror control circuit(s). Refer to CIRCUIT TESTING and WIRING REPAIRS .
Did you find and correct the condition?		 Go to Step 19  Go to Step 13 
11 Inspect for poor connections at the power mirror switch. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS .
Did you find and correct the condition?		 Go to Step 19  Go to Step 16 
12 Inspect for poor connections at the power mirror. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS .
Did you find and correct the condition?		 Go to Step 19  Go to Step 19 
13 Inspect for poor connections at the memory mirror module. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS .
Did you find and correct the condition?		 Go to Step 19  Go to Step 18 
14 Repair the open or short to ground in the battery positive voltage circuit. Refer to CIRCUIT TESTING and WIRING REPAIRS .
Did you complete the repair?		 Go to Step 19  -
15 Repair the open in the ground circuit. Refer to CIRCUIT TESTING and WIRING REPAIRS .
Did you complete the repair?		 Go to Step 19  -
16 Replace the power mirror switch. Refer to Power Mirror Switch Replacement .
Did you complete the repair?		 Go to Step 19  -
17 Replace the power mirror. Refer to Mirror Replacement (Power Mirror)  or Mirror Replacement (Manual) .
Did you complete the repair?		 Go to Step 19  -
18 Replace the memory mirror module. Refer to Accessory and Outside Rear View Mirror Module Replacement .
Did you complete the repair?		 Go to Step 19  -
19 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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