Vehicle Speed Sensor: Testing and Inspection

Do not use a test lamp to perform the following tests as excessive current draw will damage electronic components inside the amplifier. Use only a high impedance digital multi-meter.

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.