Circuit Operation

When the Ignition Switch is in RUN, voltage is applied through the TURN/BU Fuse to the Backup Lamp Switch. With the Transmission in "REVERSE," voltage is applied to the LH and RH Backup Lamps, which are permanently grounded. When voltage is applied to CKT 24, the Backup Lamps are on. CKT 24 also supplies input to the Electrochromatic Rearview Mirror Dimming function. Connection is also provided for the Trailer-Tow capability.