Cruise Control Indicator Light Circuit
- Remove Engine Control Module (ECM) with connectors connected. See Figure. Turn ignition switch to ON position. Using voltmeter positive lead, backprobe ECM E9 connector terminal No. 9 (Yellow/Black wire) with negative lead to ground. 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, go to next test listed.
- Check instrument cluster. See appropriate INSTRUMENT PANELS article. Repair as necessary. If instrument cluster is okay, replace ECM and retest system.