Grand Cherokee 4WD V8-5.7L VIN 2 (2007)
Backup Lamp Switch: Description and Operation
DESCRIPTION
Vehicles with an 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. Refer to the service and diagnostic information for the automatic transmission
type installed in the vehicle.
