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Circuit/System Testing

WARNING: This page is about a different car, the 2011 Chevrolet Volt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the S26 Hazard Lamps Switch.
  2. Test for less than 5 Ω between the S26 Hazard Lamps Switch harness connector ground circuit terminal 3 and ground.
    • If greater than the specified value, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the S26 Hazard Lamps Switch.
  3. Connect the harness connector at the S26 Hazard Lamps Switch.
  4. Disconnect the harness connector X2 at the K9 Body Control Module.
  5. Ignition ON, test for less than 0.3 V at the K9 Body Control Module X2 harness connector signal circuit terminal 26 and ground.
    • If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the S26 Hazard Lamps Switch.
  6. Ignition OFF, test for infinite resistance between the K9 Body Control Module X2 harness connector signal circuit terminal 26 and ground.
    • If less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the S26 Hazard Lamps Switch.
  7. Press the S26 Hazard Lamps Switch ON, test for less than 5 Ω between the K9 Body Control Module X2 harness connector signal circuit terminal 26 and ground.
    • If not within the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the S26 Hazard Lamps Switch.
  8. If all circuits test normal, replace the K9 Body Control Module.
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