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Speed Control Does Not Work

  1. Inspect all electrical and vacuum connections. Repair as necessary. If all connections are okay, go to net step.
  2. Step on brake pedal. Check for proper stoplight operation. Repair stoplight circuit if necessary. If stoplights operate properly, go to next step if vehicle has M/T, or to step 4) if vehicle has A/T.
  3. Check clutch switch. See CLUTCH SWITCH TEST. Service switch if necessary. If clutch switch operates properly, go to next step.
  4. Check actuator cable. See ACTUATOR CABLE under ADJUSTMENTS. Service actuator cable if necessary. If actuator cable operates properly, go to next step.
  5. Check throttle cable for proper operation. Service if necessary. If throttle cable is okay, go to next step.
  6. Check for vacuum at servo. If there is no vacuum, go to next step. If vacuum is okay, go to step 8).
  7. Check vacuum dump valve. See VACUUM DUMP VALVE TEST. Service vacuum dump valve if necessary. If vacuum dump valve is okay, service hose.
  8. Check all switches. See CONTROL SWITCH & CIRCUIT TEST. Service as necessary. If switches are okay, go to next step.
  9. Check servo. See SERVO TEST. Replace servo if defective. If servo is okay, go to next step.
  10. Check speed sensor. See SPEED SENSOR TEST. Replace speed sensor if defective. If speed sensor is okay, go to next step.
  11. Check amplifier. See AMPLIFIER TEST. Replace amplifier if defective. If amplifier is okay, recheck all electrical and vacuum connections.
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