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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Chevrolet HHR. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the recirculation actuator.
  2. Ignition ON, connect a test lamp between the control circuit terminal A and control circuit terminal B. Place the actuator switch in each direction. The test lamp should briefly illuminate when commanding the actuator from one direction to the other.
    • If the test lamp is always OFF, test both control circuits for a short to ground or an open/high resistance. If the circuits test normal, replace the HVAC control module.
    • If the test lamp is always ON, test both control circuits for a short to voltage. If the circuits test normal, replace the HVAC control module.
  3. If all circuits test normal, test or replace the recirculation actuator.
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