1994 Buick Lesabre

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

Your best bet ,take it to a qualified repair shop that has the proper knowledge an testing equipment .
003 Fuel System Tests Scan Data Tests
003 Engine Peformance Tests Scan Data Tests

On this website you find fuse box diagram and description for Buick LeSabre (1994)

Buick LeSabre 1994 fuse box diagram CARKNOWLEDGE

There were several different radios and such but here is the most detailed and common one. Hope this helps...

Replace crank sensor

1994 Buick Lesabre Car Stereo Radio Wiring Diagram
Car Radio Constant 12V+ Wire: Orange
Car Radio Ignition Switched 12V+ Wire: Yellow
Car Radio Ground Wire: Black
Stereo Radio Illumination Wire: Gray
Stereo Radio Dimmer Wire: Brown
Stereo Radio Antenna Trigger Wire: N/A
Stereo Radio Amplifier Trigger Wire: N/A
Front Speakers Size: 4′ x 6′
Front Speakers Location: Doors
Left Front Speaker Wire (+): Tan
Left Front Speaker Wire (-): Gray
Right Front Speaker Wire (+): Light Green
Right Front Speaker Wire (-): Dark Green
Rear Speakers Size: 6′ x 9′
Rear Speakers Location: Rear Deck
Left Rear Speaker Wire (+): Brown
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Dark Blue
Right Rear Speaker Wire (-): Light Blue

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1994 Buick LeSabre 3.8 liter V-6 VIN "L"



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Setting the clock is easy. Place the key in the ignition and place in accessory. The clock should come on. Push the set button, on the right side, and use the scan/seek button to advance the time. Joe

ON AN ELECTRIC ANTENNA, YOU CANNOT JUST REPLACE JUST THE MAST.