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All Gauges Inoperative

  1. Check IGN 1 fuse located in rear junction block. See COMPONENT LOCATIONS  . If fuse is blown, go to step 3). If fuse is okay, go to next step.
  2. Check I/P fuse located in underhood junction block. See COMPONENT LOCATIONS  . If fuse is blown, go to step 4). If fuse is okay, go to step 5).
  3. Repair open or short to ground in Pink wire between IPC and rear junction block. Replace fuse and recheck system operation.
  4. Repair open or short to ground in Orange wire between IPC and underhood junction block. Replace fuse and recheck system operation.
  5. Turn ignition switch to OFF position. Disconnect IPC connector C2. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. Use DVOM to measure voltage between ground and IPC connector C2 terminal A1 (Orange wire). See Fig 1 . If reading is 10.5-15 volts, go to next step. If reading is not 10.5-15 volts, go to step 4).
  6. Turn ignition switch to ON position. Use DVOM and measure voltage between ground and IPC connector C2 terminal A3 (Pink wire). If reading is 10.5-15 volts, go to next step. If reading is not 10.5-15 volts, go to step 3).
  7. Turn ignition switch to ON position. Use DVOM and measure voltage between IPC connector C2 terminals A1 (Orange wire) and B6 (Black/White wire). If reading is 10.5-15 volts, go to step 9). If reading is not 10.5-15 volts, go to next step.
  8. Repair open in Black/White wire between IPC and ground. Recheck system operation.
  9. Turn ignition switch to ON position. Use DVOM to measure voltage between IPC connector C2 terminals A1 (Orange wire) and B7 (Black wire). If reading is 10.5-15 volts, go to step 11). If reading is not 10.5-15 volts, go to next step.
  10. Repair open in Black wire between IPC and ground. Recheck system operation.
  11. Replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. Recheck system operation.
    Fig 1: Identifying IPC Connector C2 Terminals
    G98G00998Courtesy of GENERAL MOTORS CORP.
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