Speed Sensor
NOTE:
Not all speed sensor problems can be detected with resistance checks. Substitution with a known good speed sensor may be necessary.
- 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.
- Road test vehicle and observe speedometer needle. If speedometer needle wavers, replace speed sensor. If speedometer needle does not waver, speed sensor is okay.