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Home › Dodge and Ram › 2000 › Durango 4.7 N, Part Time › Repair and Diagnosis › Accessories & Equipment › Cruise Control Systems › Component Tests › Speed Control Servo

Speed Control Servo

  1. Start engine. Disconnect Speed Control (S/C) servo 4-pin connector. Turn S/C on. Using a voltmeter, check voltage at S/C servo connector terminal No. 3 (Dark Blue/Red wire). Battery voltage should exist when brake pedal is not depressed. If battery voltage exists, go to next step. If battery voltage does not exist, check circuit between brake switch and S/C servo. See WIRING DIAGRAMS .
  2. Connect a jumper wire between S/C servo pin No. 3 and S/C servo connector terminal No. 3. Check voltage at S/C servo pins No. 1, 2 and 4. If battery voltage does not exist, replace S/C servo. If battery voltage exists, go to next step.
  3. Turn ignition off. Check for continuity between S/C servo connector terminal No. 4 and ground. If continuity exists, test is complete. If continuity does not exist, repair open ground circuit as necessary.
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