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Test P: Fog Lamp Indicator Inoperative

  1. If lighting system diagnostic systems check has been performed, go to next step. If lighting system diagnostic systems check has not been performed, go to LIGHTING SYSTEM DIAGNOSTIC SYSTEMS CHECK under SELF-DIAGNOSTIC SYSTEM in BODY CONTROL MODULES - CATERA article.
  2. Check fog light indicator bulb for open. To access bulb, remove Instrument Panel Cluster (IPC). See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. If no problem is found, go to next step. If problem is found, repair as necessary and go to step  6 .
  3. Disconnect IPC 26-pin harness connector C1. Turn fog light switch on. Using test light connected to ground, probe IPC harness connector C1 terminal No. 5 (Brown wire). If test light does not illuminate, go to next step. If test light illuminates, go to step  5 .
  4. Repair open or high resistance in fog lights supply voltage circuit (Brown wire) between IPC harness connector C1 terminal No. 5 and fog light switch. See WIRING DIAGRAMS  . After repairs are made, go to step  6 .
  5. Replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. After repairs are made, go to next step.
  6. Connect all harness connectors and components that were disconnected. If fog light indicator operates normally, testing is complete. If fog light indicator does not operate normally, go to step  2 .
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