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Test Z: Turn Signal Lamps And/Or Indicators Always On Or Flashing

  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 MODES - CATERA article.
  2. Turn ignition switch to RUN position. Move turn signal switch to left and then right positions while observing turn signal lamps and indicators. If turn signals do not operate normally, go to next step. If turn signals operate normally, concern may be intermittent. See PROBLEM DIAGNOSIS  under INTERMITTENTS.
  3. Ensure that turn signal and hazard switches are in off position. If turn signal lights are not flashing, go to next step. If any turn signal light is flashing, go to step  5 .
  4. If turn signal indicators are always on, go to step  9 . If turn signal indicators are not on, go to step  6 .
  5. Disconnect turn signal switch harness connector. If any turn signals lights are flashing, go to step  8 . If turn signals lights are not flashing, go to step  7 .
  6. Repair short to voltage in supply voltage circuit of always on turn signal. See EXTERIOR LIGHTS article. After repairs are made, go to step  10 .
  7. Replace turn signal switch. See STEERING COLUMN SWITCHES - CATERA article. After repairs are made, go to step  10 .
  8. Replace hazard warning switch. After repairs are made, go to step  10 .
  9. Replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. After repairs are made, go to next step.
  10. Operate system to verify repair. If system operates normally, testing is complete. If system does not operate normally, go to step  2 .
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