Interior Fuse Box Location: 2005-2011 Cadillac STS 2005 Click to view0:17The video above shows how to replace blown fuses in the interior fuse box of your 2005 Cadillac STS 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 STS - 2006 Fuse Box Diagram diagramfusebox›CadillacCadillac; STS - 2006 Fuse Box; If the alarm does not sound when it should, check to. see if the horn works. The horn fuse may be blown. To. replace the fuse, see. Fuses and Circuit Breakers on. page 5-105. If the fuse does not need to be replaced, you. may need to have your vehicle serviced.