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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 Inoperative (3.5L) >> Circuit/System Verification

Circuit/System Verification

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. If DTCs P0480 or P0481 are set, then perform those diagnostics first.
  2. Ignition ON, command each relay ON and OFF with a scan tool. Observe to verify that the fan turns ON and OFF with each command.
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