Cruise Control Servo: Testing and Inspection

1. Turn ignition switch to ON position without starting engine.
2. Activate speed control ON switch.

Fig. 13 Servo Harness Connector:

3. Disconnect 4-way electrical connector and vacuum harness at servo.
4. Connect a jumper wire from pin 2 of the servo to pin 2 of the wire connector.
5. Ground pins 1, 3 and 4 in the servo connector
6. Connect a suitable hand held vacuum pump to the vacuum nipple of the servo and apply 10-15 inches of vacuum.
7. Ensure throttle cable pulls in and holds as long as long as vacuum pump is connected. After one minute, ensure cable is still holding. If cable does not hold, replace servo.
8. Disconnect pin 3 from ground. Cable should return to rest position. If cable does not return, replace servo.