Backup Lamp: Description and Operation

With the Ignition Switch in RUN, voltage is applied from Fuse E, in the Engine Compartment Fuse Box, to the Manual Lever Position Sensor (E4OD), Backup/Neutral Safety Switch (C6 or AOD) or Backup Lamp Switch (MTX). With the switch closed, voltage is applied to the Backup Lamps through the 140 (BK/PK) wires.