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Test H: Generator Gauge Inaccurate Or Inoperative

  1. If instrument panel cluster diagnostic system check has been performed, go to next step. If instrument panel cluster diagnostic system check has not been performed, go to INSTRUMENT PANEL CLUSTER DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. If generator gauge does not operate normally, go to next step. If generator gauge operates normally, concern may be intermittent. See PROBLEM DIAGNOSIS  under INTERMITTENTS.
  3. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). DLC is located under left side of instrument panel. Using scan tool, observe SWITCHED BATTERY VOLTAGE parameter in Instrument Panel Cluster (IPC) data list. If SWITCHED BATTERY VOLTAGE parameter is not 9-16 volts, go to next step. If SWITCHED BATTERY VOLTAGE parameter is 9-16 volts, go to step  6 .
  4. Check for open in switched battery voltage circuit (Brown wire) between instrument panel fuse block CLAMP 15 CRUISE fuse (15-amp) and gauge cluster harness connector C2 terminal No. 20. See Figure . See WIRING DIAGRAMS  . If no problem exists, go to next step. If problem exists, repair as necessary and go to step  7 .
  5. Check for poor, loose or corroded terminals in gauge cluster harness connector. If no problem exists, go to next step. If problem exists, repair as necessary and go to step  7 .
  6. Replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. After repairs are made, go to next step.
  7. Operate system to verify repair. If system operates normally, testing is complete. If system does not operate normally, go to step  2 .
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