Ranger 2WD V6-177 2.9L (1989)
Vehicle Speed Sensor/Transducer - Cruise Control: Testing and Inspection
1.
Disconnect speed sensor connector, then connect an ohmmeter between dark green/white and black wires.
2.
A reading of 180-250 ohms should be obtained. A reading of 0 ohms indicates a shorted coil and an infinity reading indicates an open coil.
3.
Replace sensor if a proper reading has not been obtained.