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Home >> Chevrolet >> 2012 >> Cruze LT, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 202 (Lighting System) >> Diagnostic Information and Procedures >> Headlamp Leveling Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2011 Chevrolet Cruze. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the appropriate headlamp assembly.
  2. Ignition OFF, test for less than 5 Ω between the ground circuit terminal 3 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, connect a test lamp between the ignition circuit terminal 1 and ground. The test lamp should illuminate.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  4. Ignition OFF, disconnect the harness connector at the S30 Headlamp Switch.
  5. Ignition ON, connect a test lamp between the ignition circuit terminal 9 and ground. The test lamp should illuminate.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  6. Ignition ON, test for less than 0.3 V between the signal circuit terminal 10 and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage.
  7. Ignition OFF, test for greater than 500 kΩ between the signal circuit terminal 10 and ground.
    • If less than the specified range, test the signal circuit for a short to ground.
  8. Ignition OFF, test for less than 5 Ω between the signal circuit terminal 10 at the S30 Headlamp Switch and the control circuit terminal 2 at the appropriate headlamp assembly.
    • If greater than the specified range, test the signal circuit for an open/high resistance.
  9. Ignition OFF, reconnect the harness connector at the S30 Headlamp Switch. Connect a test lamp between the control circuit terminal 2 at the appropriate headlamp assembly and ground.
  10. Switch the headlamp leveling switch in each position. The test lamp illumination should change in each position.
    • If the test lamp does not illuminate or does not change their illumination, replace the S30 Headlamp Switch.
  11. If all circuits test normal, replace the appropriate headlamp assembly.
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