Where is the horn fuse

Jim, Remove passenger side kick panel to access the fuse box where horn fuse is located #3 fuse in your manual, box fairly high up under dash. Horn relay under hood/engine compartment fire wall.
Check the attached links,instruction and guides and a manual for your buick, Good luck
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Interior Fuse Box Location 1990 1999 Buick LeSabre 1992 Buick LeSabre...
Troubleshooting broken Horn or fuse or relay GM Buick LeSabre 1994 1995...
http://pdfstream.manualsonline.com/8/81776d98-998a-493c-aac6-a5895c51d47b.pdf
Horn doesnt work Ricks Free Auto Repair Advice

look in the owners manual under fuses it will show where the fuse box are located.There are probably 2 boxes one inside and 1 under the hood.Have someone honk the horn and start unplugging them.Most of the time they are marked.

The horn can be removed from service in 2 ways.

1) Locate horn unit in front of car and unplug them. ( There are usually 2 separate units, one high and one low)

2) Use the owners manual, find the fuse box locater and pull the fuse.

Hope this was helpful,

NEED DIAGRAMM OR LOCATION?THE HORNS ARE LOCATEDBEHIND THE FOG LIGHTS AT THE RIGHT AND THE LEFT ONE.THE FUSE IS A 20 AMPS LOCATED AT THE ENGINE COMPARTMENT FUSE BOX NUMB 46.IF U NEED MORE INFO LET ME KNOW

It may be your horn fuse. It will be in one of your fuse boxes. Just follow your diagram on the fuse box lid.

here is a link to the wiring schmatics. The horn circuit is on page 27. http://www.pswired.com/misc/pacaudio/syswire.pdf

horn is under the hood. usually right against the grill or mounted on fender well. fuses for horn can be under the dash, or in fuse panel under the hood.

Hi, the horn fuse is located under the hood, number 18 and is a 15amp rated mini-fuse. To find the location look at the bottom of the plastic fuse lid for number 18.

The fuse for the horn is located in your car bonnet where the fuses are.

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the horns (two) on cars are usually located forward of the radiator and behind the grill.  Sometimes they are better reached from below the car.  And usually you need to remove some plastic shield to get to them.  The fuse in in the fuse box and should be marked as is the horn relay.