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Home >> Saturn >> 2007 >> Relay 3.9 1 >> Repair and Diagnosis >> External Pages >> Different car >> Section 22 (Mirror System) >> Diagnostic Information and Procedures >> Heated Mirrors Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Saturn Outlook. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the inoperative outside rearview mirror heater element.
  2. Test for less than 1.0 ohm of resistance between the heater element ground circuit terminal 10 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the heater element control circuit and ground circuit terminals 3 and 7 connector X3.
  4. Activate the inoperative mirror heater switch ON and OFF. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit terminal 7 for a short to voltage. If the circuit tests normal, replace the inoperative door control module.
    • If the test lamp is always OFF, test the control circuit terminal 7 for a short to ground or an open/high resistance. If the circuit tests normal, replace the inoperative door control module.
  5. If all circuits test normal, test or replace the inoperative outside rearview mirror.
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