Switch, Backup Lamp: Description
Vehicles with an electronic automatic transmission have a Transmission Range Sensor (TRS) (2) that is used to perform several functions, including that of the backup lamp switch. The TRS is an integral component to the valve body assembly and is only serviced with a valve body replacement.
The manual transmission back-up lamp plunger style switch (1) is connected to a 3 inch wire pigtail connector (2) that clips to the side of the transmission case. The switch itself screws into the right hand side of the transmission case. It activates off of the offset lever which interacts within an area of the shift rails. When going into the reverse gate, the plunger depresses which turns on the reverse lamps.