GM Service Manual Online
For 1990-2009 cars only

Headlamp Wiring for Cadillac DeVille 2003

The headlamp wiring system has four individual fuses, LF low, RF low, LF high and RF high. An electrical overload will cause the lamps to go on and off, or in some cases to remain off. If this happens, have the headlamp wiring checked right away.