Reverse Light Switch

HOW TO DETECT THE REVERSE LIGHT SWITCH FAILURE

To inspect the part operability, you need a multimeter set to a continuity check mode. The gauge contacts are connected to the corresponding terminals of the tested part. For greater measurements accuracy and to prevent short-circuit, it is advisable to connect the multimeter probes to the sensor contacts through two insulated wires. Then, shift transmission to the reverse gear. If you hear no sound signal, then the switch circuit is broken. Constant sounding of the signal, with reverse gear both on and off, indicates a short circuit inside the component. To check the sensor removed from the car you have to act on its plunger by hand.

If you do not have a multimeter, you can use a test lamp. For this, connect one of its contacts to the battery, and the second one to one of the switch terminals. The second switch terminal is connected to the battery. Absence of light with the activated plunger indicates a sensor fault. The continuous lamp light regardless of the plunger position also indicates the contacts closure.