Vehicle Speed Sensor
Disconnect vehicle speed sensor harness connector. Remove vehicle speed sensor. Connect positive battery voltage to terminal No. 3 and negative battery voltage to terminal No. 2 at vehicle speed sensor. SeeFig 1 . Connect positive lead of voltmeter to terminal No. 1 and negative lead to terminal No. 2 at vehicle speed sensor. Rotate vehicle speed sensor manually. Voltage should change from zero to 11 volts or more 4 times per revolution. If vehicle speed sensor does not test as specified, replace vehicle speed sensor.