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Speed Sensor

NOTE: Not all speed sensor problems can be detected with resistance checks. Substitution with a known good speed sensor may be necessary.
  1. Locate speed sensor on transmission (transfer case for 4WD). Disconnect speed sensor 2-pin connector. Measure resistance between wire terminals of speed sensor connector. If resistance does not measure 180-250 ohms, replace speed sensor. If resistance measures 180-250 ohms, go to next step.
  2. Road test vehicle and observe speedometer needle. If speedometer needle wavers, replace speed sensor. If speedometer needle does not waver, speed sensor is okay.
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