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Home >> Jeep >> 1989 >> Wagoneer >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - 4.0L MPFI >> Testing & Trouble Shooting >> System Testing >> Speed Sensor Test

Speed Sensor Test

Disconnect speed sensor electrical connector from the sensor. Place an ohmmeter between terminals "A" and "B". (Marked on connector). See Figure . Reading should be 125-275 ohms with engine hot. Replace sensor if readings are not within specifications.