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Servo Test

  1. Unplug 8-pin connector at servo. Measure resistance between terminals associated with specified wires on harness connector. See the SERVO RESISTANCE  table. If measurements are as specified, go to next step. If measurements are not as specified, replace servo.
    SERVO RESISTANCE

    Circuit No. Ohms
    Orange/Yellow - Gray/Black 40-70
    Orange/Yellow - White/Pink 100-150
    Purple/Blue - Brown/Green 35,000-70,000
    Purple/Blue - Yellow/Red 15,000-35,000
    Yellow/Red - Brown/Green 15,000-35,000
  2. Reconnect servo connector. Unplug 8-pin connector at amplifier. Measure resistances at connector between wire pairs of same colors as in step 1). If resistance is not as specified, inspect wiring harness, and repair as necessary. If resistance are as specified, go to next step.
    NOTE: Wire colors specified in steps 2) and 3) are those on the mating connector. Actual jumper connections should be made to the servo itself.
  3. Disconnect servo connector. Start engine. Connect servo terminal No. 1 (Orange/Yellow wire) to positive battery terminal. Connect servo terminal No. 3 (White/Pink wire) to ground. Momentarily connect servo terminal No. 2 (Gray/Black wire) to ground.
  4. Servo throttle actuator arm should pull in and engine speed should increase. Disconnect jumper at terminal No. 3 (White/Pink wire). When jumper at terminal No. 3 is disconnected, servo should release. Replace servo if operation is not as specified.
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