Servo Assembly
- Disconnect ball chain from throttle linkage. Separate eight-way connector at amplifier, then connect an ohmmeter between the orange/yellow hash wire and gray/black hash wire at the connector. A resistance of approximately 85 ohms should be obtained. Connect ohmmeter between the orange/yellow hash wire and white/pink hash wire at connector. A resistance of approximately 85 ohms should be obtained. Reconnect the ball chain to carburetor.
- Start the engine with the servo-to-amplifier connector disconnected. Connect orange/yellow hash wire of servo to battery positive terminal, connect white/pink hash wire to ground, and then momentarily touch gray/black hash wire of servo to ground. Servo throttle actuator should tighten bead chain and open throttle. Throttle should hold in that position or slowly release tension on chain.
- When white/pink hash wire is removed from ground, servo should release bead chain tension immediately. If servo fails any of the preceding tests, replacement of the servo is necessary. If orange/yellow hash wire is shorted to either white/pink hash wire or gray/black hash wire, it may be necessary to replace amplifier.
Courtesy of FORD MOTOR CO.