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Home >> Geo >> 1991 >> Prizm Base, 4D Hatchback, Standard >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Diagnosis - A-240 "E" Series >> Component Testing >> No. 1 Speed Sensor

No. 1 Speed Sensor

  1. Disconnect 10-pin (Brown) connector from rear of instrument panel. Connect ohmmeter between Brown and Purple/White wire terminals of 10-pin (Brown) connector on rear of instrument panel.
  2. Rotate speedometer cable shaft on instrument panel. Note that ohmmeter needle fluctuates from continuity to no continuity. If reading does not fluctuate correctly, replace speedometer or speed sensor as necessary.
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