Cruise Control Indicator Inoperative
WARNING: This page is about a different car, the 1997 Mercury Mountaineer and 1997 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition switch off. Disconnect cruise control servo connector C171 located at right rear of engine compartment. See Fig 1 . Turn ignition switch on. Connect fused jumper wire between ground and cruise control connector C171, terminal No. 1 (Orange/Light Blue wire). If cruise control indicator illuminates, replace cruise control servo and retest system. If cruise control indicator does not illuminate, go to next step.
- Turn ignition switch off. Disconnect headlight switch connector C216 located under the left side of the instrument panel. See Figure . Turn ignition switch on. Measure voltage between ground and headlight switch connector C216, terminal No. 4 (Brown/White wire). If voltage is more than 10 volts, go to step 5). If voltage is less than 10 volts, go to next step.
- Turn ignition switch off. Disconnect dimmer relay located in relay module behind center of instrument panel. See Figure . Turn ignition switch on. Measure voltage between ground and dimmer relay connector cavity No. 4 (Red/Yellow wire). If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts repair open in Red/Yellow wire between relay connector and fuse No. 11 located in interior fuse panel and retest system.
- Turn ignition switch off. Measure resistance between dimmer relay terminals No. 3 and 4. See Figure . If resistance is less than 5 ohms, repair open in Brown/White wire between dimmer relay connector and headlight switch connector and retest system. If resistance is more than 5 ohms, replace dimmer relay and retest system.
- Turn ignition switch off. Disconnect dimmer module connector C219 located on left side of steering column. See Figure . Measure resistance of Light Blue/Red wire between headlight switch connector C216, terminal No. 9 and dimmer module connector C219, terminal No. 4. See Figure and Figure . If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open in Light Blue/Red wire between headlight switch connector and dimmer module connector and retest system.
- Ensure headlight switch is off. Measure resistance between headlight switch terminals No. 4 and 8. Turn headlight switch on (headlights on). Measure resistance between headlight switch terminals No. 8 and 9. See Figure . If resistance in both tests is less than 5 ohms, go to next step. If any resistance is more than 5 ohms, replace headlight switch and retest system.
- Turn ignition switch off. Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Measure resistance of Orange/Black wire between instrument cluster connector C286, terminal No. 5 and headlight switch connector C216, terminal No. 8. See Figure and Figure . If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open in Orange/Black wire between instrument cluster connector and headlight switch connector and retest system.
- Measure resistance between instrument cluster connector C286, terminal No. 4 (Orange/Light Blue wire) and cruise control servo connector C171, terminal No. 1. If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open in Orange/Light Blue wire between instrument cluster connector and cruise control servo connector and retest system.
- Measure continuity between terminals of cruise control indicator bulb. If continuity exists, replace instrument cluster printed circuit and retest system. See PRINTED CIRCUIT under REMOVAL & INSTALLATION. If continuity does not exist, replace bulb and retest system.