Cruise Control Servo Test

1. Turn ignition switch to ON position.
2. With speed control switch in On position, set up a suitable voltmeter to read battery voltage and ground negative lead.
3. Activate speed control ON switch.
4. Disconnect 4-way electrical connector and vacuum harness at servo.
5. Test pin 3 of the of harness for battery voltage, in no voltage is present inspect power supply circuit for speed control servo.
6. Connect a jumper wire from pin 3 of the servo to pin 2 of the wire connector. Pins 1, 2 and 4 of the servo should show battery voltage, if no voltage is present replace servo.
7. Connect a suitable ohmmeter to ground and pin 4 of servo, then inspect for continuity. If there is no continuity, then repair ground circuit.