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Test A: No Communication With Instrument Cluster

CAUTION: Electronic modules are sensitive to static electrical charges. Proper grounding of technician and component is essential to prevent damage.
  1. Turn ignition switch to OFF position. Disconnect instrument cluster 22-pin harness connector C239, and 20-pin harness connector C240. Turn ignition switch to ON position. Measure voltage between specified instrument cluster harness connector terminals and ground. See INSTRUMENT CLUSTER VOLTAGE  table. If all readings are 10 volts or more, go to next step. If any reading is less than 10 volts, repair circuit.
    INSTRUMENT CLUSTER VOLTAGE

    Connector Terminal No. Wire Color
    C239 11 White/Yellow
    C240 7 Light Blue/Pink
    C240 8 & 9 White/Light Blue
  2. Turn ignition switch to OFF position. Measure resistance between instrument cluster harness connector C240 terminal No. 12 (Black wire) and ground. If resistance is less than 5 ohms, repair module communication concern. See MODULE COMMUNICATIONS NETWORK - WINDSTAR article. If resistance is 5 ohms or more, repair open or poor connection in Black wire to ground connector G304, located behind left kick panel.
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