Cruise Control Servo
- Turn ignition switch and cruise control switch to ON position. Using a voltmeter, connect negative lead to a good chassis ground. Disconnect cruise control servo 4-pin connector. Measure voltage on servo connector terminal No. 2 (Dark Blue/Red wire). If battery voltage is not present, go to next step. If battery voltage is present, go to step 7).
- Disconnect brakelight switch 6-pin connector. Measure voltage on brakelight switch connector terminal No. 6 (Dark Blue/Red wire). If battery voltage is present, test brakelight switch. See BRAKELIGHT SWITCH. Replace brakelight switch, if defective. If brakelight switch is okay, repair Dark Blue/Red wire between brakelight switch and cruise control servo. If battery voltage is not present, go to next step.
- Access cruise control switch. See Figure . Disconnect cruise control 4-pin connector. Measure voltage on cruise control switch connector terminal No. 1 (Yellow/Red wire).
- If battery voltage is not present, go to step 6). If battery voltage is present, test cruise control switch. See CRUISE CONTROL SWITCH. Replace cruise control switch, if defective. If cruise control switch is okay, check for continuity across clockspring. See Figure .
- If no continuity exists across clockspring, replace clockspring. If continuity exists across clockspring, repair Yellow/Red wire between clockspring and brakelight switch.
- Measure voltage on input side of cruise control fuse. If battery voltage is not present, repair open in wire between ignition switch and cruise control fuse. If battery voltage is present, check cruise control fuse. Replace fuse if blown. If fuse is okay, repair wire between fuse and clockspring.
- Connect a jumper wire between cruise control servo connector terminal No. 2 (Dark Blue/Red wire) and servo terminal No. 2. With jumper wire connected, battery voltage should be present at servo's 3 remaining terminals. If battery voltage is present at servo's 3 remaining terminals, go to next step. If battery voltage is not present at servo's 3 remaining terminals, replace servo.
- Using an ohmmeter, connect one lead to good chassis ground. Connect remaining lead to servo connector terminal No. 1 (Black wire). If no continuity exists, repair open in Black wire. If continuity exists, test is complete.