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Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1344 (Lighting Systems) >> Diagnostic Information and Procedures >> Interior Backlighting Malfunction (w/AN3) >> Circuit/System Testing >> Front Door Switch Backlighting Circuit Test
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Front Door Switch Backlighting Circuit Test

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector X4 at the door lock and side window switch.
  2. Connect a 3A fused jumper wire between the low reference circuit terminal 4 and ground.
  3. Connect a test lamp between the backlight supply voltage circuit terminal 13 and B+. The heated seat switch backlighting should illuminate.
    • If the switch backlighting does not illuminate, replace the heated seat switch.
  4. If the switch backlighting tests normal, replace the door lock and side window switch.
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