1995 buick riviera horn does not work.Relay and 20amp fuse are

english please.
is car the Brazil HOmbre? ours is different. here. in USA.

we are USA english forum
horn is dead, 1997 Hombre.
check the fuse yet,that is always first, marked HORN it is.
a 20amp fuse.

the horn is very simple. but the path it follows is complex
(due to steering wheel turns, complications in all cars made)
first off is air bags if car has air bags , working on horn parts in dash will be dangerous, so defeat air bags first. !
the FSM book tells how to do that. read that. and do that.
be safe.
so you can test the horn on a battery, hot wired. just like a light bulb. same test. but why would both horns fail>?"relay"
clean the horn base grounds so its not rusty.
sure one horn rust, ignored then 2nd rusts and owner acts.
you can check the horn relay, or replace it.
the check the horn relay coil for 12vdc across the coil of relay while honking, 12vdc honking, if 0v, that means the horn switch in the steering hub is bad or the airbag, clock spring contacts bad (danger area)
the horn button grounds a wire. to energize the horn relay.
it only takes a volt meter to test all this.
got one?
other wise it's a gue$$ing game.

our car (USA) is:
"In 1996, Isuzu replaced its Pick Up with a version of the Louisiana-built Chevrolet S-10, the Isuzu Hombre, based on the Brazilian market S-10"

so will answer for S10.
this car has 2 horns if both are dead, check the relay

using a volt meter,
i honk the horn and the bottom of the coil in relay below goes to 0v
from 12v.
if its not 12vdc to begin i check the top of coil there.
if that pin is 0v, the fuse is blown, good looking fuse can in fact be bad. we test fuses. not guess.
if you honk the relay closes, (can be seen or heard to close)
click?
if the relay does click, then he bottom contact below goes to 12vdc
if not the relay IS BAD.
the below horns grounds are missing , error in the manual.
the horn bases are grounded. to the car body. if not they will be dead.

Good Day,

Something else you may want to check is the wire attached to the horn. You can check this by removing the horn assembly from the steering wheel. There is a wire that connects to the back of the horn pad, over time road vibration can knock this loose as it is held on by a small clip. You can also check the connection on the horn itself under the hood. Here's a pic of what the horn phyiscally looks like.


Hope this helps

Typical scenario of the horn pad needing to be replaced at the steering wheel, may have to search the wrecking yards for a replacement or take the pad off and try to discover what part of it is bad and try to repair what you have.
Some folks have added a button useing the same twop wires that control the horn pad, thus eliminating the need to find a replacement horn pad in the proper color etc. a hole drilled into the dash and the button installed makes it a lot easier and cheaper and yiou still have a horn.
Every once in a while the horn relay is the culprit but mostly it is the horn pad, be careful of the air bag deploying...disconnect the air bag fuse before doing any work on the electrical inside the car.

really need more information. does your air bag light stay on, if so your clockspring below the steering wheel could be bad. disconnected the wires at your horn and with a test light see if the light comes on at the wire while someone presses the horn. if it does the horns are bad. there should be a horn relay under the hood for the horn. it could be bad. i hope this helps.

under the hood on the right front relay center fuse 20 amp

have a look under the bonnet (hood) at the front of the car and you will see the horn or horns,just disconnect the wires and they wont work,or remove fuse for horn

many of them have a removable cover if the horn is part of the airbag.... dealer part only

your horn relay is located under the hood in the black box that also houses the fuses and relays for your whole car .. under the lid for this black box is the location for all the relays and fuses check it out and see if it has your horn relay in there thanks and holler if you need more. Jerry

take the fuse out

I think he may have just bent the connection that activates the horn. Does it honk when you turn the wheel one way or the other? Try that and let me know what the out come is.