Operation CHARM: Car repair manuals for everyone.

Backup Lamp: Description and Operation

When the ignition switch is in the ON or the START position, voltage is applied from the B-U LMP/BTSI fuse to the park/neutral position switch. When the transaxle is in REVERSE, voltage is applied to the left and the right backup lamps. The backup lamps are permanently grounded. When the voltage is applied to the back-up amp feed circuit, the backup lamps are ON.