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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Engine Controls - System/Component Tests) >> Miscellaneous ECM Controls >> Cooling Fan (C-12) >> Cooling Fan Relay

Cooling Fan Relay

WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 1992 Pontiac Trans Sport, 1992 Oldsmobile Silhouette, 1992 Oldsmobile Bravada, 1992 GMC Yukon, and 1992 GMC Vandura Special. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect cooling fan relay harness connector. Using an ohmmeter, check continuity of relay winding. See Figure - Figure . Continuity should exist. Check continuity across power delivery terminals of relay. With relay not energized, continuity should not exist.
  2. With ohmmeter still attached to power delivery terminals of relay, apply battery voltage and ground to energize relay winding. Continuity should now exist between cooling fan relay power delivery terminals. Replace cooling fan relay if continuity does not exist.
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