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Test R: Speed Control Indicator Is Never On

WARNING: This page is about a different car, the 2002 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: After making any repairs, clear DTCs and perform self-test.
  1. Test drive vehicle and operate speed control system. If speed control operates correctly, go to next step. If speed control does not operate correctly, diagnose and repair as necessary. See CRUISE CONTROL SYSTEMS - F150 article.
  2. Turn ignition switch to LOCK position. Disconnect speed control servo 10-pin harness connector C122 and instrument cluster 20-pin harness connector C220a. Speed control servo is located in left rear corner of engine compartment. Measure resistance in Orange/Light Blue wire between instrument cluster 20-pin harness connector C220a terminal No. 14 and speed control servo 10-pin harness connector C122 terminal No. 1. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open in Orange/Light Blue wire between instrument cluster and speed control servo.
  3. Disconnect all instrument cluster harness connectors. Inspect harness connectors for corrosion and pushed out pins. Connect all instrument cluster harness connectors, ensuring they are connected correctly. Operate system and verify if concern is still present. If concern is still present, replace instrument cluster. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. If concern is not present, system is operating correctly at this time. Clear DTCs and perform self-test.
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