The wiring circuits in your vehicle are protected from short circuits by a combination of fuses and circuit breakers. This greatly reduces the chance of fires caused by electrical problems.
Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure you replace a bad fuse with a new one of the identical size and rating.
If you ever have a problem on the road and don't have a spare fuse, you can borrow one that has the same amperage. Pick some feature of your vehicle that you can get along without-like the radio or cigarette lighter-and use its fuse, if it is the correct amperage. Replace it as soon as you can.
There are three fuse blocks in most late model Cadillacs: the engine compartment fuse block, the MaxiFuse relay center and the rear compartment fuse block.