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Test A: No Communication With Instrument Cluster

  1. Turn ignition switch to OFF position. Disconnect instrument cluster 18-pin harness connector C220c. Figure . Turn ignition switch to RUN position. Measure voltage between ground and instrument cluster harness connector C220c, terminals No. 2 (Red/Yellow wire), No. 3 (Black/Pink wire) and No. 4 (Orange/Light Green wire). See Fig 1 . If all voltages are 10 volts or more, go to next step. If any voltage is less than 10 volts, repair open in appropriate wire.WIRING DIAGRAMS  .
  2. Turn ignition switch to OFF position. Measure resistance between ground and instrument cluster harness connector C220c, terminal No. 1 (Black/White wire). Measure resistance between ground and instrument cluster harness connector C220c, terminal No. 5 (Black wire). If both resistances are less than 5 ohms, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - TRIBUTE article . If either resistance is 5 ohms or more, repair open in Black/White wire or Black wire. See WIRING DIAGRAMS  .
Fig 1: Identifying Instrument Cluster Harness Connector C220c Terminals
G00034963Courtesy of FORD MOTOR CO.
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