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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 66 (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 2007 Cadillac DTS. 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 fan is not activated.
    • If the fan is not activated, then replace the faulty relay.
    • If the fan is activated, then test the fan voltage supply circuits for a short to voltage.
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