Cruise Control Servo Test
- Turn ignition on. Place cruise control switch in ON position. Using external voltmeter, connect negative lead to vehicle ground. Disconnect servo connector. Check voltage at pin No. 2 (Dark Blue/Red wire) of servo connector. If voltage is less than battery voltage, check for loose connections, brake switch adjustment or damaged harness.
- Connect a jumper wire between terminal No. 2 (Dark Blue/Red wire) of servo connector and corresponding terminal of servo. Check voltage at 3 remaining male servo terminals. If voltage is less than battery voltage at each terminal, replace servo.
- Using external ohmmeter, measure resistance between terminal No. 1 of servo connector and vehicle ground. If resistance is more than 5 ohms, check and repair harness as needed.