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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 103 (LIGHTING SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESFOG LAMPS INOPERATIVECIRCUIT/SYSTEM TESTINGFOG LAMP SWITCH CIRCUIT TESTING
2006 Isuzu Ascender S, 5.3 M, 4WD

Fog Lamp Switch Circuit Testing

2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Fog Lamp Switch Circuit Testing
WARNING: This page is about a different car, the 2007 Pontiac Torrent and 2007 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the fog lamp switch, pin 4.
  2. Ignition OFF, test for less than 1 ohm of resistance between the ground circuit and ground.
    • If greater than 1 ohm, test the ground circuit for an open/high resistance. If the circuit test normal, replace the BCM.
  3. Verify the scan tool fog lamp switch parameter is inactive.
    • If not inactive, test the signal circuit for a short to ground. If the circuit tests normal, replace the BCM.
  4. Install a 3-amp fused jumper wire between the signal circuit and ground. Verify the scan tool fog lamp switch parameter is active.
    • If not active, test the signal circuit of the fog lamp switch for a short to voltage or an open/high resistance. If circuit tests normal, replace the BCM.
  5. If all circuits test normal, test or replace the head lamp switch located within the multifunction switch.
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