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Home >> Chevrolet >> 2012 >> Traverse LS, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 160 (Engine Cooling System) >> Diagnostic Information and Procedures >> Cooling Fan Always On >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2013 GMC Acadia, 2013 Chevrolet Traverse, and 2013 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the cooling-left high speed relay.
  2. Ignition ON, observe that both fans are OFF.
    • If both fans are OFF, test or replace the cooling fan -left high speed relay.
    • If both fans continue to operate, test the left high speed relay controlled output circuit for a short to voltage.
    • If the right fan is activated, perform the next test.
  3. Ignition OFF, disconnect the cooling fan-right high speed relay.
  4. Ignition ON, observe that the right fan is OFF.
    • If the right fan is activated, test the right high speed relay controlled output circuit for a short to voltage.
  5. If the circuits test normal, test or replace the cooling fan-right high speed relay.
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