Speed Sensor (Exc. Electronic Speedometer)
Disconnect connector containing speed sensor wires from amplifier and connect an ohmmeter between wire connector terminals (green/white stripe and black) at speed sensor end. A reading of 30 to 100 ohms should be obtained. A reading of 0 ohms indicates a shorted coil, and a high reading indicates an open coil. If reading is between 30 and 100 ohms, and speedometer operates properly, sensor is good. Substitute a new sensor if necessary to check operation.