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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the KR2 Headlamp Washer Fluid Pump Relay.
  2. Connect a test lamp between the control circuit terminal 86 and ground.
  3. Ignition ON, command the headlamp washer ON and OFF using the wiper switch. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.
    • If the test lamp is always OFF, test for a short to ground or an open/high resistance on the control circuit. If the circuit tests normal, replace the K9 Body Control Module.
  4. If all circuits test normal, test or replace the KR2 Headlamp Washer Fluid Pump Relay.
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