Sprinter 3500 V6-3.0L DSL Turbo VIN 45 (2007)
Backup Lamp Switch: Description and Operation
Description
DESCRIPTION
Vehicles equipped with a manual transmission have a normally open, spring-loaded plunger type backup lamp switch. Vehicles with an optional
electronic automatic transmission have an Electronic Shifter Module (ESM) (also known as the EWM) that is used to perform several functions,
including that of the backup lamp switch. The ESM is described in further detail. Refer to the service and diagnostic information for the automatic
transmission installed in the vehicle.
The backup lamp switch is located in a 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 vehicle 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.
