RAM 3500 Chassis Cab Truck 2WD L6-6.7L DSL Turbo (2010)
Backup Lamp Switch: Description and Operation
Backup Lamp Switch - Description
DESCRIPTION
Vehicles equipped with a manual transmission have a normally open, spring-loaded plunger type backup lamp switch (2). Vehicles with an optional
electronic automatic transmission have a Transmission Range Sensor (TRS) that is used to perform several functions, including that of the backup lamp
switch. The TRS is described in further detail elsewhere in this service information. Refer to the service and diagnostic information for the automatic
transmission type installed in the vehicle.
The backup lamp switch is located in a threaded hole on the side of the manual transmission housing. The switch has a threaded body and a hex
formation near the plunger end of the switch. An integral connector receptacle at the end of the switch opposite the plunger connects the switch to the
vehicle electrical system through a take out and connector of the engine wire harness. When installed, only the switch connector and the hex formation
are visible on the outside of the transmission housing.
The backup lamp switch cannot be adjusted or repaired and, if ineffective or damaged, the entire switch unit must be replaced.
