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Test 56A - All Gauges Inoperative

NOTE: Perform TEST 54A  before proceeding with this test. For connector terminal ID, see CONNECTOR IDENTIFICATION  . For wiring schematics, see WIRING DIAGRAMS  in this article. Perform TEST VER-1 - VERIFICATION PROCEDURE  after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module connector.
  1. Turn the ignition switch to the OFF position. Remove and inspect fuse No. 17. See Figure . If the fuse is open (blown), proceed to TEST 56B  . If fuse is okay, reinstall fuse. Go to next step.
  2. Turn ignition on. Using scan tool in voltmeter mode, measure voltage at fused ignition switch output terminal (Red/White wire) on fuse No. 17 socket. If voltage is 10 volts or less, go to step 7). If voltage is more than 10 volts, go to next step.
  3. Turn ignition off. Disconnect instrument cluster Black connector. Turn ignition on. Using scan tool in voltmeter mode, measure voltage at terminal No. 6 (Red/White wire) on instrument cluster Black connector. If voltage is 10 volts or less, repair open Red/White wire. If voltage is more than 10 volts, go to next step.
  4. Connect a jumper wire between ground and terminal No. 3 (Violet/Brown wire) on instrument cluster Black connector. Using scan tool, perform CCD bus test. If scan tool does not display BUS SHORTED TO GROUND, repair open Violet/Brown wire between Body Control Module (BCM) and instrument cluster. If scan tool displays BUS SHORTED TO GROUND, go to next step.
  5. Connect a jumper wire between ground and terminal No. 2 (White/Black wire) on instrument cluster Black connector. Using scan tool, perform CCD bus test. If scan tool does not display BUS SHORTED TO GROUND, repair open White/Black wire between BCM and instrument cluster. If scan tool displays BUS SHORTED TO GROUND, go to next step.
  6. Close all doors. Turn ignition off and remove key. Wait 30 seconds. Using scan tool in ohmmeter mode, measure resistance at terminal No. 1 (Black/Light Green wire) on instrument cluster Black connector. If resistance is 100 ohms or greater, repair open Black/Light Green wire. If resistance is less than 100 ohms, replace instrument cluster.
  7. Turn ignition off. Disconnect ignition switch connector. See Figure . Turn ignition on. Using scan tool in voltmeter mode, measure voltage at terminal No. 9 (Red wire) on ignition switch connector. If voltage is 10 volts or less, repair open Red wire. If voltage is more than 10 volts, go to next step.
  8. Turn ignition off. Using an external ohmmeter, measure resistance between terminal No. 8 (Red/White wire) on ignition switch connector and ignition switch output terminal on fuse No. 17 socket. If resistance is 5 ohms or greater, repair open Red/White wire. If resistance is less than 5 ohms, replace ignition switch.
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