Backup Lamp: Description and Operation
PRINCIPLES OF OPERATIONReversing Lamps
The reversing lamps receive voltage when the reversing lamp relay is energized. For vehicles equipped with an automatic transmission (A/T), the digital transmission range (TR) sensor routes power to the reversing lamp relay to energize the coil when the transmission is placed in REVERSE. For vehicles equipped with a manual transmission (M/T), the reversing lamp switch routes power to the reversing lamp relay to energize the coil when the transmission is places in REVERSE.