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Home >> Lincoln >> 1995 >> Mark VIII Base >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel >> Testing >> Electronic Speedometer Test

Electronic Speedometer Test

  1. Raise and support vehicle. Unplug connector from vehicle speed sensor, located at transmission. Connect AC voltmeter between speed sensor terminals.
  2. Start engine. Observe voltmeter. With drive wheels rotating, voltage should be 1.3-1.6 volts. If voltage is not as specified, go to next step. If voltage is as specified, go to step 4).
  3. Remove speed sensor from transmission. Verify presence of drive gear and clip. Inspect teeth for condition. Repair as necessary.
  4. Turn ignition off. Remove instrument cluster. Inspect wires between speed sensor and instrument cluster for open or short circuits. Repair as necessary.
  5. Inspect printed circuit and speedometer contact for open or short circuits between connector and speedometer. Repair or replace as necessary. If vehicle speed sensor and associated circuitry are okay, but speedometer does not operate properly, replace speedometer.
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