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Test B: Instrument Cluster Module Inoperative

  1. Turn ignition switch to LOCK position. Disconnect 20-pin instrument cluster harness connector C251. It may be necessary to remove instrument cluster for access to connector. See REMOVAL & INSTALLATION  . Measure voltage between ground and instrument cluster harness connector C251 terminal No. 10 (Red/White wire). See Figure . If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Red/White wire between instrument cluster and fuse No. 21 (5-amp) in Central Junction Box (CJB). CJB is located behind left side of instrument panel. See WIRING DIAGRAMS  .
  2. Turn ignition switch to RUN position. Measure voltage between ground and instrument cluster harness connector C251 terminal No. 11 (Pink/Black wire). If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Pink/Black wire between instrument cluster and fuse No. 5 (15-amp) in Central Junction Box (CJB). CJB is located behind left side of instrument panel. See WIRING DIAGRAMS  .
  3. Measure voltage between ground and instrument cluster harness connector C251 terminal No. 12 (White/Light Blue wire). If battery voltage exists, go to next step. If battery voltage does not exist, repair open in White/Light Blue wire between instrument cluster and fuse No. 34 (20-amp) in Central Junction Box (CJB). CJB is located behind left side of instrument panel. See WIRING DIAGRAMS  .
  4. Turn ignition switch to LOCK position. Measure resistance between ground and instrument cluster harness connector C251 terminal No. 20 (Black/White wire). If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open in Black/White wire between instrument cluster and ground. Ground point is located behind center of instrument panel. See WIRING DIAGRAMS  .
  5. Measure resistance between ground and instrument cluster harness connector C251 terminal No. 1 (Black wire). If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open in Black wire between instrument cluster and ground. Ground point is located behind center of instrument panel. See WIRING DIAGRAMS  .
  6. Disconnect all instrument cluster harness connectors. Inspect all instrument cluster harness connectors for loose, damaged or corroded terminals. If terminals are damaged, repair as necessary. If terminals are not damaged, reconnect all instrument cluster harness connectors. Ensure instrument cluster harness connectors are seated properly. If problem still exists, replace instrument cluster module. See REMOVAL & INSTALLATION  .
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