JUST BOUGHT A 98 VETTE AND THE HORN DONT WORK. LOOKED AT THE FUSE AND IT WAS BLOWN.PUT A NEW ONE IN AND IT BLEW IT UP. THE RELAY WORKS. ANY SUGGESTIONS!!

If the fuse blew, most likely the new one you installed also blew. Check it again. You have a short somewhere. Double check all the wires you did while installing the horn button.

85 is an old car, and will have lamps out, a given
so replace it. the lamp.
the horn can fail many ways.
the horn fuse blown.
the horn relay bad.
the horn is bad.

we dont just gue$$ we use a tool called a voltmeter.
i put the meter across the horn terminals.
if just 1 , the meter goes there, an other lead to body ground
you mate, then honks
if the silent voltage goes to 12vdc, then the horn is bad. or
the base is rusted and is no good now. rust is and electrical insulator to a horn.
if no 12v, go to the relay,
i see the output of relay is dead, no 12vdc honkiing
i then check across the coil of said relay, coil, pins.
its 12v, that is a bad relay
its 0v, that is a bad horn switch
lets pretend the other relay contact pin is 0v. that is a blown horn fuse.
and guess what , fuse that look bad are, but ones that look good can be bad.
so my same meter, i flip the dial to RX1 ohms or low ohms
and read the fuse , and its infinity, dang, a hair line crack inside...
0 ohms is a good fuse.

Could be a short in the steering wheel or column. Or a faulty horn relay.
You may need a wiring diagram to trace the circuits from the relay.
Usually the black wire is the ground and the green is voltage from the relay.

Sounds l;ike the horn itself has a short. Try another from a salvage yard. If fuse blows again, it's likely a wire to horn that lost insulation and touching metal.
Good luck.

Check fuse. Usually located under the Steering wheel or under the hood. You will have to use the other side of the cover to determine which fuse controls the horn and see if the metal link is broken. If both are not blown its probably a short in the wire. If it randomly just happened then its a good first guess without knowing any further details.

Usually I check all my fuses any time I am looking for a specific one. Sometimes a random fuse can be the cause, and not the actual Horn fuse that is blown.

Check fuse for horn and for dash lights. If the interior lights work then suspect dimmer switch for the dash lights. If you press the horn button do you hear a click under the hood or inside the car? If you do not then the fuse is blown and if the fuse is good then the relay may be suspected bad. If the fuse is good and the relay clicks then suspect the horn to be bad. If fuse is blown and you put a new one in and you push the horn and the fuse blows again, then disconnect the horn before replacing the fuse again. Then push the horn button and see if you hear the relay click if you hear a click the the horn is bad or wiring butmost likely the horn. If you have the horn unplugged and the fuse is good and you push thee horn button and no relay click suspect the horn button to be bad. Hope this helps.

Look for a horn relay in the fuse case--you can usually substitute a similar relay from some other position for a test. The horn button switch may be defective as well.

hi, first of all you can pull the relays and fuse, if they look fried well you have to replace them. open the fuse box underneath the dash board and relays under the hood

Well, it could be a fuse. Check the associated fuse, if it is ok then proceed to checking for power at the horn (it should have 12v). If the horn has power then replace the horn. If it does not then seek proffesional certified help due to the fact that the problem is going to be in the steering column or horn pad, and that will require dealing with the airbag system (which is NOT recommended) unless qualified.

You need a new horn.