1993 Buick LeSabre Horn wont work ?

Horn button or wiring issue. Does the relay click whenthe button is pressed?

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
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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

i would check the ground out inside the steering wheel before anything else. these can get bent or broken off during a good panic honk or during a fit of roadrage. once ok'ed i would have a helper with a test light or volt meter check the system as you honk the horn to find out where the voltage stops. where the voltages stops will be the problem

Check for voltage at horn. Most horns get water in them and stop working.

look to your fuel filter, you may have sucked up trash from your gas tank with the new better pumping pump

Replace air bag. Not servicable to repair horn. Special bits are used to remove it. Get a used one

You need to replace the sending unit which is screwed into the block. It connects the ground circuit to the fan at the proper temperature.

on a removable panel under the steeering column marked fuse panel and some times the are located in the glovebox

if you here a clicking sound that the relay so check our horn or wire to it thanks pierre