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Cruise Control Indicator Light Circuit

  1. Remove cruise control ECU with connector attached. See Figure. Turn ignition on. Measure voltage (backprobe) between ground and terminal No. 4 (Black/Yellow wire) of cruise control ECU harness connector. See Figure. With cruise control switch in OFF position, 10-16 volts 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 TESTS , perform next test listed.
  2. Check instrument cluster. See appropriate INSTRUMENT PANELS article. Repair as necessary. If instrument cluster is okay, replace cruise control ECU and retest system.
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