Horn blows fuse

Could be a wiring problem or the clockspring in the steering column.
You would need to pull the steering wheel and test the circuits.

If horn stops with fuse removed, the problem is in the steeringf wheel. If horn continues to sound with fuse removed, the problem is a defective horn relay (located in fuse panel under hood).

You may of forgot to plug back in the ground wire that connects to the horn bracket under the air bag. It's just a single wire and should have a tiny black connector on the end of it.

check the main fuse in the engine bay fuse box its a big one 80 amp this will have blown. doing this can also blow the ecu. but you may be lucky. horn going off is the alarm so this may have a problem to so would check this out as well.

Any thoughts on how to fix the horn? Test the electrical circuit , horn relay , switches !
VEHICLE RELAYS Operation Diagnosis
Visual Inspection Chart Mechanical Electrical

• Damaged horn
• Damaged steering wheel pad horn switch (part of driver side air bag module)
• Damaged HORN relay
• Damaged speed control servo (if equipped)

• Blown fuse:
  • 15A HORN
• Damaged wiring harness
• Loose or corroded connections

• The Horn Sounds Continuously

• HORN relay.
• Circuitry.
• Steering wheel pad horn switch (part of driver side air bag module).
• Air bag sliding contact

• GO to Pinpoint Test B .

plus the horn is bad .

I verify its not a stuck relay...

I disconnect connector under dash and horn stops...

I then suspect its the Horn contacts or a worn grounded wire in air bag/horn switch assembly in steering wheel.

The decorative Vinyl cover shrinks with age...presses on horn contacts against air bag.

I Disconnect Air bag connector (identified as Yellow wire and Connector) usually under dash.

WARNING: ( I Do not - I DO NoT probe the yellow harness/connector with a meter or test light. A test light WILL Detonate my air bag, and impale the bracket in a nearby object/person - me.)

I Removed screws (2) behind steering wheel - which allow air bag horn assembly to be removed.

I Disconnect Air bag connector in this location as well (identified as Yellow wire and Connector) and then;

The red (color varies) and black Horn wires will be plugged into ribbon connectors usually (2) two that feed/connect to contacts for horn function on face of air bag.

I pause here and verify horn will stop blowing when I disconnect the wires going to horn contacts. So I get horn blowing again...

Check horn: To verify this is the cause; I reconnect (whatever fuse/relay/ connector (Not the airbag connector) I disconnected so they will stop blowing) and get horn/s so they are blowing again...

Then I disconnect the ribbon connectors to verify blowing stops.

Note: The experience I had with horn on

Buick Park Ave was at night when temperature cools after hot day, the vinyl cover shrank and horn blows... pressing on horn area of steering wheel firmly would stop horn briefly - then continue.

Note: I will need a rivet tool and rivets... to reassemble.

WARNING: I Do not drill into airbag explosive container. If I do not know how to carefully drill off correct rivet heads and remove vinyl decorative cover from air bag/horn... I STOP and go to the junkyard or ebay and purchase/replace the airbag/horn assembly.

I continued by drilling out rivets (the rivets holding vinyl cover) by using a drill bit as large (or smaller) as the head of rivet and drill gently to release head from rivet body/shank.

I mark all pieces with a magic marker to verify I reassemble right side up (all metal brackets and trim plates and cover).

I Remove vinyl cover exposing horn contact pads which were sandwiched between cover and air bag container.

I used a razor blade to remove vinyl honeycomb material from area of vinyl cover - that when pressed - would activate horn/contacts.

Only a 1/16 of an inch or less needs to be removed.

(I Bend cover inside out and shave material off of area slowly. Care not to cut myself.)

I Reassemble in reverse order with rivets.

Check horn: ...function at this point... by plugging in horn connectors and assure horn contacts work properly as expected.

it's the horn relay has a short to ground which closes your swich and will make the horn stay on. replacing the relay (usually found under the hood in the fuse box) that should resolve the issue if not then you would have to trace the ground.

Hi,
If the horn only honked once it may be a symptom of your car alarm being set off after power has been re-applied. If the horn stays on after you reconnect the battery you have either a stuck horn button on your steering wheel or a stuck horn relay. Or it could be the alarm sounding the horn but that usually that occurs in a series of horn blasts (rather than continuous) and the car indicators usually flash in sync with the alarm sounding.
If the horn is stuck on in a continuous blast ie not sounding on and then off and then on etc etc, disconnect one the battery cables then pull the fuse that feeds the horn or pull off one of the removable spade electrical connectors from one of the 2 terminals on the horn itself. Usually the fuse box is either under the dashboard on the drivers side or could be under the hood. Consult your user manual for your car for fuse and horn locations.
If the horn is stuck you need to visit a qualified auto electrician, or perhaps you have a friend who knows his way around auto electrics?
Cheers,
Steve (Melbourne, Australia)

replace the horn

you may have to replace alarm may have burnt it up