The horn on my 1991 Pontiac grand am just quit working Is their more than one fuse that we should look for and where is it located. thank you

The horn it self try jumping it with a wire from the battery if it doesn't work then you need to replace it

Of couse there is a fuse , plus a relay ,wiring , switch in the steering wheel , horn slip ring etc... Testing at the relay could be done if you knew how. . If the fuse was blown it would be because of a electrical short . Fuse don't blow for no reason .
VEHICLE RELAYS Operation Diagnosis

Actually the horn relay on this one is in the dash next to the flasher. This is to the left of the steering column if you are sitting in the driver's seat. It's kind of behind the dimmer switch.

simple fix is replace the flasher any local parts store has them and will be more than happy to show you the location it should be by the fuse panel

the answer is obvious here the horn pad contact is defective replace it.

THE HORN RELAY AND FUSE ARE IN THE UNDERHOOD FUSE BOX.

If you jumper from the positive terminal on the batt to the horn and it doesnt sound off the horn is bad. But i would check the wiring to it make sure its connected and if there is a good fuse in place. If that checks good find the relay and make sure the relay it good.

A test light is great for testing all fuses without pulling 1 by one. $5-$10 at autoparts or hardware store, will save you tons of aggravation in the end, and you'll always have it for later use.

I believe that the horn fuse is located on the passenger side of the dashboard. There is another fuse box there.

check with a test light if you have poer to horn 12if not could be horn button.or relay.