Servo Vacuum Test

1. Remove speed control cable at throttle body.
2. Disconnect 4-way electrical connector and vacuum harness at servo.
3. Connect battery voltage to pin 3 of the servo.
4. Ground pins 1, 2 and 4 in the servo connector
5. Connect a suitable hand held vacuum pump to the vacuum nipple of the servo and apply 10-15 inches of vacuum.
6. 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.