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Test F: Incorrect Temperature Gauge Indication

  1. Turn ignition switch to LOCK position. Connect New Generation Star (NGS) tester to Data Link Connector (DLC). DLC is located below driver's side of instrument panel, right of steering column. Turn ignition switch to RUN position. Using NGS tester, select instrument cluster active command ENGCOOLNT. Trigger, monitor and scroll ENGCOOLNT at 0%, 50% and 100%. Temperature gauge should indicate cold at 0%, half at 50% and hot at 100%. If temperature gauge does not respond as specified, go to next step. If temperature gauge responds as specified, repair engine coolant temperature sensor circuit. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  2. Disconnect all instrument cluster harness connectors. It may be necessary to remove instrument cluster for access to instrument cluster harness connectors. See REMOVAL & INSTALLATION  . Inspect all instrument cluster harness connectors for loose, damaged or corroded terminals. If terminals are damaged, repair as necessary. If terminals are not damaged, reconnect all instrument cluster harness connectors. Ensure instrument cluster harness connectors are seated properly. If problem still exists, replace instrument cluster module.
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