2004 Buick Century, horn quit working, replaced both horns and checked the relay (it works). The horn still does not work. Could it be the switch in the steering wheel? How do I get the cover off the steering wheel to check the switch there?

No Vince

The most likely is that someone tried to break into it and it is the alarm. Horn pads don't self activate. I guess it might be a faulty relay?

https://www.google.com/search?q=2000+Buick+Century+Custom+horn+went+off+on+its+own

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suggest checking if 12 volts goes to horn wire at horn end when horn pressed from inside vehicle. A 12 Volt probe {google it} can be a cheap checking tool for this.
If 12v volts is switched when button is pressed {could be earth being switched if it is then place probe on constant 12 volts and negative lead on switched earth wire} then the horn itself is faulty.
If no voltage switched then horn relay needs to be checked. check if voltage at horn relay coil contact when button pressed.
if yes then relay may be faulty. if no then horn switch could be faulty.
you can check switched voltage also at horn relay switched contact when relay plugged in. To see if relay is doing what it is meant to do

have you checked for power at the horn itself and is the ground good at the horn.

bad horn replace it

There is a relay that is actiavted to switch high current to the horn. Check that horn relay!

check for power to the horn relay. also check for signal to the relay from the steering wheel contact buttons. if all is good then must be a bad horn.

Check the wires on the horn. Wiggle them while someone activates the horn button. Next connect a hot wire from the battery directly to the horn. If there is no change the problem is probably a bad horn.

Before checking the horn, I would check all of the fuses and the horn relay. If all of those are fine, on a lot of vehicles the horn is located inside either the left or right front clip. In other words, in the space between the left and right engine bay walls, and the outside of the left and right fender. You will have to remove the inside of the fender (above the wheels) to see if the horn is in there. Also, the switch inside the steering wheel could have gone out. If you can get the front panel off of the steering wheel, run a wire from the positive to negative wires on the horn switch, if the horn works, the switch has gone out.

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

• horn fuse 20 amps and is behind right side of instrument panel
• radio fuse is 10 amps and is behind right side of dash-board
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