I have an 1997 deville and the horn doesn't work i checked the fuse relay it works fine in another fuse spot what else could be wrong

The 'A' and 'F' note horns are located underhood at the front right corner of the vehicle. To "disconnect" the horns, pull off the electrical connectors or remove the horn relay in the underhood fuse block. If they are on continuously, consider replacing this horn relay, but the problem may be in the steering wheel assembly.

No 97 high lander

These are just ideas, but In my simple attempt....start with checking, or have someone check every fuse in the fuse box. Another thought is that the turn signal indicator arm that controls blinkers, high beams has finally gave out. And when it did, it might have shorted out the horn. Being a 1993, it has probably seen some usage. Does the cigarette lighter work?? Also check the fuse in the fuse box that controls the horn, because in some of my experiences, the cigarette lighter and the horn are sometimes on the same fuse.

does it work with the key fob but not with the switch then check the horn pad switch if doesn't work with either check the relay

Horn may be bad or switch on the steering wheel. The way to check either would be with a 12V light or meter.

There are also relays for the horn. First check would be the connections at the horn then the fuse. If the fuse isn't blown, it's possible that the relay has gone on it. Another item to check would be the wires leading up to the horn it's self. If any of them are frayed and touching bare metal, causing a short circuit, the horn wouldn't work then.

OK, try to use a test light and connect the horn lead to ground to see if there is current, and to see if it sounds. If it does, then the wiring is fine to the horn itself. The relay may click, but are the contacts ok? Maybe swap out the relay for a new one.

The horn is located at the front of the vehicle near the radiator. Before you even look at the horn, check the fuse - the horn has its own fuse. Then check the horn relay and then the horn. Lastly, if the horn still does not work check the horn switch/button

there could be a horn relay bad, if your car is so equiped or the horn button could be bad. wiring could be bad or the horn itself. if you can jumper 12 volts from the battery to the horn, you can eliminate the horn.