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Servo Assembly Test

  1. Disconnect ball chain from carburetor (if equipped). Separate 8-way connector at amplifier. Connect ohmmeter between Orange/Yellow and Gray/Black wires at connector. Resistance of 40-125 ohms should be obtained.
  2. Connect ohmmeter between Orange/Yellow and White/Pink wires at connector. Resistance of about 60-90 ohms should be obtained. Reconnect ball chain. Start engine with servo-to-amplifier connector disconnected. Verify that engine vacuum exceeds 2.5 in. Hg.
  3. Connect Orange/Yellow wire of servo to battery positive terminal. Connect White/Pink wire to ground and momentarily touch Gray/Black wire of servo to ground. Servo throttle actuator should tighten bead chain or actuator cable and open throttle.
  4. Throttle should remain in that position (or SLOWLY release tension). When White/Pink wire is removed from ground, servo should release tension immediately. If servo fails tests, replace servo.
CAUTION: If Orange/Yellow wire is shorted to either White/Pink wire or Gray/Black wire, it may cause damage to amplifier.
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