Interior Fuse Box Location: 2000-2005 Cadillac DeVille Click to view0:17The video above shows how to replace blown fuses in the interior fuse box of your 2004 Cadillac DeVille in addition to the fuse panel diagram location. Electrical components such as your map light, radio, heated seats, high beams, power windows all have fuses and if they suddenly stop working, chances are you have a fuse Cadillac DeVille (2003 - 2004) - fuse box diagram - Auto Oct 02, 2016Cadillac DeVille (2003 – 2004) – fuse box diagram. Year of production: 2003, 2004. Underhood Fuse Block. The underhood fuse block is located next to the engine on the passenger’s side of the vehicle. To access the fuses, push in the two tabs located at each end of the fuse block cover. Then lift the cover off.