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Test 56B - All Gauges Inoperative

NOTE: For connector terminal identification and wiring diagrams, see BODY CONTROL COMPUTER  section in this article. Perform TEST VER-1  VERIFICATION TEST after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module connector.
  1. Using scan tool in ohmmeter mode, check resistance of fuse No. 17 connector (Red/White wire). See Figure . If resistance is 5 ohms or greater, replace fuse. If resistance is less than 5 ohms, go to next step.
  2. Disconnect instrument cluster connectors. Check resistance of fuse No. 17 connector (Red/White wire). If resistance is 5 ohms or greater, replace instrument cluster and fuse. If resistance is less than 5 ohms, go to next step.
  3. Disconnect Transmission Control Module (TCM) connector. TCM is located in engine compartment between left front fender and battery. Check resistance of fuse No. 17 (Red/White wire). If resistance is 5 ohms or greater, replace TCM and fuse. If resistance is less than 5 ohms, go to next step.
  4. Disconnect Body Control Module (BCM) connector. BCM is located behind right kick panel. Check resistance of fuse No. 17 (Red/White wire). If resistance is 5 ohms or greater, replace BCM and fuse. If resistance is less than 5 ohms, repair short to ground in Red/White wire and replace fuse.
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