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Speedometer/Odometer Does Not Operate

  1. Disconnect instrument cluster connector. Disconnect VCM connector C4 (gasoline) or vehicle speed sensor buffer connector (diesel). Connect a self-powered test light between instrument cluster connector terminal No. 14 (Dark Green wire) and ground. See Figure . If test light does not come on, go to next step. If test light comes on, repair short to ground in Dark Green wire.
  2. Connect self-powered test light between instrument cluster connector terminal No. 14 (Dark Green wire) and vehicle speed sensor buffer connector terminal No. 15 (diesel) or vehicle control module connector C4 terminal No. 4 (Dark Green wire). If test light comes on, replace instrument cluster. If test light does not come on, repair open circuit in Dark Green wire.
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