LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting >> Diagnostic Information and Procedures >> Hazard Lamps Malfunction >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the X1 harness connector at the turn signal/multifunction switch.
  2. Verify that a test lamp iluminates between the ground circuit terminal C and ground.
    • If the test lamp does not illuminate, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool hazard lamp switch parameter is Inactive.
    • If not the specified value, test the signal circuit terminal G for a short to ground. If the circuit tests normal, replace the BCM.
  4. Install a 3A fused jumper wire between the signal circuit terminal G and the ground circuit terminal C. Verify the scan tool hazard lamp switch parameter is Active.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
  5. If all circuits test normal, test or replace the turn signal/multifunction switch
scientia non olet · About LEMON Manuals