Avalanche, Express, Savana 2006-2007

Mirrors

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Power Mirrors



Diagnosis & Testing


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Fig. Mirror switch harness connector identification-Avalanche

  1. Check the fuses for the mirror circuit. Verify there is 12 volts at the fuse terminal. If voltage is not present, check the wiring.
  2.  
  3. Remove the mirror switch.
  4.  
  5. With the ignition OFF, check for continuity between terminal B and ground. If there is no continuity or high resistance, inspect the wire harness for opens.
  6.  
  7. With the ignition ON, use a test light and verify it lights when placed between terminal G and ground. If the test light does not illuminate, check the fuse. If the fuse is ok, there is an open in the wiring.
  8.  
  9. Turn the ignition OFF. Attach the switch to the harness. Detach the electrical connector from the inoperative mirror. Using an ohmmeter, test the resistance between each terminal as follows:
    1. Terminal 6 and ground while holding the UP position.
    2.  
    3. Terminal 1 and ground while holding the DOWN position.
    4.  
    5. Terminal 6 and ground while holding the LEFT position.
    6.  
    7. Terminal 2 and ground while holding the RIGHT position.
    8.  

  10.  
  11. The ohmmeter should read 5 ohms. If greater than this, check for high resistance/open in the wiring.
  12.  
  13. Turn the ignition ON. Using a test light, check between each terminal as follows:
    1. Terminal and ground while holding the UP position.
    2.  
    3. Terminal 6 and ground while holding the DOWN position.
    4.  
    5. Terminal 2 and ground while holding the LEFT position.
    6.  
    7. Terminal 6 and ground while holding the RIGHT position.
    8.  

  14.  
  15. If the test light illuminates in each of the steps but the motor does not work, then the motor is defective. If not, there is a short to ground or an open in the wiring.
  16.  

  1. Check the fuses for the mirror circuit. Verify there is 12 volts at the fuse terminal. If voltage is not present, check the wiring.
  2.  
  3. Disconnect the outside rearview mirror switch.
  4.  
  5. Probe the battery positive voltage circuit (terminal E) of the power mirror switch with a test lamp that is connected to ground. Connect a test lamp between the battery positive voltage circuit of the power mirror switch harness connector and the ground circuit (terminal D) of the power mirror switch harness connector. The test lamp should light in both cases. If not, check the wiring.
  6.  
  7. Connect terminal D of the mirror motor connector to ground. Connect 12 volts to each of the motor control terminals (E, F, G and H). The mirror should move in each position; if not, replace the mirror.
  8.  
  9. If all tests are normal but the mirror does not function, replace the switch.

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    Fig. Mirror switch harness connector identification-Express and Savana