DeVille DTS V8-4.6L VIN 9 (2002)
License Plate Lamp: Description and Operation
PARK, TAIL, LICENSE AND MARKER LAMPS
The tail, stop, and turn signal functions are performed by the quarter mounted tail lamps. The quarter mounted tail lamp consists of a red lens and Light
Emitting Diodes (LED) instead of incandescent bulbs. The quarter mounted tail lamp wraps around the comer of the vehicle and serves as the rear side
marker. The lower portion of the lamp contains reflectors to alert approaching vehicles for nighttime driving safety. The park, tail, license and marker
lamps are turned on when the headlamp switch is placed in the PARK LAMP or HEADLAMP position or anytime the headlights are requested. The park
lamps are also turned on with the front fog lamps. When the ignition switch is in the ON position, the DIM provides battery positive voltage to the
controlled positive voltage circuit of the PRK LP relay coil. The rear fuse block supplies battery positive voltage to the switch contacts of the PRK LP
relay. When the headlamp switch is in the PARK LAMP or the HEADLAMP position, the park lamp switch on signal circuit has ground at G201. In
response to this signal, the DIM provides ground to the control circuit of the PRK LP relay coil, which energizes the relay coil.
This closes the relay switch contacts. Current flows from the PRK LP relay to the LP PK L fuse and to the LP PK R fuse. From the fuse, the current
flows to the park lamps. The park lamps are grounded at G401 and G402. The DIMR fuse supplies battery positive voltage to the license lamps and to
the DIM park lamp input, for interior lamps dimming. The license lamps are grounded at G402.
