Horn not working?

Replace the clockspring under the steering wheel. It's a big plastic disc containing a wound up ribbon cable.

In the past, a sliding ring contact was used for the horn button connection. Wires can't be used because they would break from the constant turning of the steering wheel. With the advent of air bags, a sliding contact can not be trusted to make perfect electrical connection in the exact microsecond the airbag must deploy. For this reason, a wound up ribbon cable is used because it makes a solid electrical connection and can withstand the constant turning of the steering wheel.

If you plan on replacing the clockspring yourself, be aware they come with a piece of tape across it that must be torn off. This ensures it was not turned before installation. The steering wheel and tires MUST be straight ahead before installing the new part. It is designed to turn an equal distance in each direction and just a little more. If the steering wheel is off-center when the clockspring is installed, it will either get tight when turning in one direction and the ribbon cable will break instantly, or it will unwind too much in the other direction and fold over on itself. The flexing will cause it to break very soon.

The clockspring will not turn at all until the steering wheel is installed because the wheel releases two lock buttons that hold the unit secured during shipping.

Caradiodoc

The clockspring sits behind the steering wheel pad and if is faulty it will cause both of these issues. If both the light and horn not working appeared at same time then it is the most likely culprit.

You should reply to you previous post in order that the person attending to you can follow up and has a history of the question.

I have transferred your question. You can followup from there.

Thanks for including the observation about the relay clicking. That rules out the fuses and clock spring, ... Two common problems.

The horns are located ahead of the left front tire. First, try swapping the horn relay with a different one. If that doesn't help, measure the voltage on the dark green / red stripe wire in one of the horn connectors. If you find 12 volts there when a helper presses the horn button, measure the voltage on the black wire. If 12 volts is there, the ground wire is open or the terminal is loose on the body. This second voltage test only works because there is a second horn in the circuit. It must not be unplugged for the test to work.

If you find 0 volts on the black wire, both horns are defective and must be replaced.

Caradiodoc

Do you have air bag light on
the cruise still work
may be clockspring under the air bag

After removing air bag remove steering wheel nut
using steerig wheel puller remove steering wheel
u can replace the clock spring know

make sur your horn is ok and fuse
good luck