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Cruise Control Indicator Light Circuit

  1. Remove Electronic Control Module (ECM) with connector attached. See Figure. Turn ignition switch to ON position. Measure voltage (backprobe) between ground and terminal No. 17 (Gray wire) of ECM 22-pin harness connector E14. See Figure. With cruise control switch in OFF position, battery voltage should be present. With cruise control switch in ON position, voltage should be less than 1.2 volts. If voltage is not as specified, go to next step. If voltage is as specified, no problem is indicated at this time. Fault may be intermittent. If sent here from SYMPTOM DIAGNOSIS, perform next test listed.
  2. Check instrument cluster. See appropriate INSTRUMENT PANELS article. Repair as necessary. If instrument cluster is okay, replace ECM and retest system.
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