Backup Light Switch Replacement Cost Estimate

The backup lamp switch can be very quick to diagnose with only a multimeter, and in some cases, a digital scanner may be all that is needed. For simple switches, the switches can be tested for continuity and checked to ensure the switch is being actuated. This can require removal and inspection of the switch and manipulation of the gear selector while testing the switch mounted on the vehicle.

The best case scenario for replacing the backup lamp switch is when the switch is located on the exterior of the transmission, especially for manual transmissions. This can be as easy as extracting the switch with a socket wrench, and installing the new switch before plugging in the electrical connector. In some cases, the shift shaft assembly, transmission pan, and even the valve body may need to be removed in order to replace the transmission position sensor. The worst case scenario is that the transmission is drained of fluid, the shift shaft assembly is removed, followed by any obstructions to removing the sensor. This may include the transmission valve body. Once accessed, the sensor can be removed, replaced, and obstructing components replaced as well. The shift shaft will receive a new seal before installation, and the transmission pan, filter, pan gasket, and fluid will be replaced prior to test driving the vehicle.

If the backup lamp switch is faulty and mounted inside the transmission oil pan, it is a good idea to check with the manufacturer to learn if an update or improvement has been made on this part. If not, it still may be a good idea to purchase the part from the manufacturer, as reliability of some third party parts may not be comparable to the manufacturer's part.