Where is the fuse box located on a 1991 cadillac el dorado to change for horn?

The fuse box location in a 1991 Cadillac Eldorado varies slightly depending on whether it's a coupe or a convertible. However, it's generally located under the hood, near the battery.

To be certain:

1. Consult your owner's manual: This is the most reliable source. It will have a diagram showing the fuse box location and a fuse legend.

2. Check the fuse box cover: Even if you can't find the manual, the cover itself often has a diagram printed on it showing the fuse layout.

3. Look near the battery: As mentioned, the under-hood fuse box is usually near the battery. It's often a black plastic box with a hinged cover.

Regarding the horn fuse: The owner's manual will tell you which fuse is for the horn. It's likely a relatively high-amperage fuse. Always turn the ignition off before changing fuses.