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Speedometer & Odometer Do Not Function

  1. Check Vehicle Speed Sensor (VSS) using oscilloscope. If VSS output is 4 pulses per rotation, go to next step. If VSS does not output in 4 pulses per rotation, replace VSS. See VEHICLE SPEED SENSOR  under REMOVAL & INSTALLATION.
  2. Check for open/shorted wires or poor connections between VSS and instrument cluster. Repair as necessary. See WIRING DIAGRAMS  . If all circuits are okay, replace speedometer. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION.
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