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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1864 (Engine Cooling System) >> Diagnostic Information and Procedures >> Cooling Fan Always On (3.5L) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the relays.
  2. Ignition ON, observe that the fans are not activated.
    • If the fans are not activated, replace the faulty relay.
    • If a fan is activated, test the fan voltage supply circuits for a short to voltage.
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