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Test R: Head-Up Display Hazard Indicators Inoperative

  1. If IPC diagnostic system check was performed, go to next step. If IPC diagnostic system check was not performed, go to INSTRUMENT PANEL CLUSTER DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing IPC diagnostic system check, go to next step.
  2. Check operation of IPC hazard indicators. If IPC hazard indicators are operating properly, problem may be intermittent. To diagnose intermittent, go to INTERMITTENT TROUBLE CODE DETERMINATION in BODY CONTROL MODULES - CORVETTE article. If HUD does not dim properly, go to next step. If IPC hazard indicators are not operating properly, go to next step.
  3. Turn ignition off. Disconnect IPC connectors. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. Turn ignition on. Turn hazard switch on. Connect test light between ground and IPC connector terminal B6 (Gray/Black wire). See Figure . If test light illuminates, go to next step. If test light does not illuminate, go to step  5 .
  4. Replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. After repairs, go to step  7 .
  5. Disconnect hazard warning switch connector. See HAZARD WARNING SWITCH  under REMOVAL & INSTALLATION. Check for open in Gray/Black wire between IPC connector terminal B6 and hazard warning switch connector terminal "E". Repair as necessary. After repairs, go to step  7 . If circuit is okay, go to next step.
  6. Replace hazard warning switch. After repairs, go to next step.
  7. Recheck system operation to verify the repair. If system operates properly, repair is complete. If system does not operate properly, go to step  3 .
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