My horn just quit working today. Been working

http://www.bbbind.com/free_tsb.html

Start by checking the fuse as it is the easiest place to start. If fuse good, you need to check for power and ground directly at the horn itself. Some horns are not very accessable and are hard to find / get at. There are a variety of possibilites that can cause a horn to not work.....
fuse
relay
horn unit
horn pad
clock spring
wiring
body control module
It may be necessary to have a shop look at it due to the complexity of todays electronics

what,kinda vehicle do u have,ck fuse,ck relay, find horn&run a jumper wire to it to see if it works,

WITH KEY ON EVERY THING ELSE OFF PUSH THE HORN YOU SHOULD HEAR A SMALL CLICK THAT THE HORN RELAY IF SO TEST FOR POWER AT THE HORN MAKE SURE IT IS STILL CONNECTED IF POWER IS GOOD REPLACED HORN

Do you get a click when you press the button? The relay should be audibly clicking if it's working.
If it is clicking then I'd check the horn itself, might be bad or have loose connection. If no clicking sound at all then I'd suspect bad relay or fuse (if it has a dedicated one), also possibly bad switch.

Start by having someone press the horn while you feel the relay with your finger. If the relay clicks when the horn is pressed then the switch is working properly and your problem is between the relay and horn assembly.

Hook up a 12v jumper lead and test the horn straight from the battery, if it works than it could be a relay or your horn button.

Actually you use the horn relay a lot! At least 3 times every time you get lock/unlock your car (6 toots, 2 toots for lock and 1 for unlock right?) ... You just said: "as i clicked my car to lock. It got weaker and weaker until it stopped working" Buy a different brand relay (preferably one not made in China, pay more) and don't expect they WILL last a long time the horns take a lot of power and they have a very dirty feedback to the relay un-like lights. You can dis-able the toots by reading your owners manual.

If it happens, you can just disconnect the fuse for the horn, or relay. It could be the switch underneat the airbag or clockspring.

hi

Check whether power is coming to horn.

if ok means then check the horn

thank you