Do you hear the horn relay click when you press the button? If you do, suspect bad horn(s). Check for 12 volts at the horn connector while a helper presses the button. If you don't hear the relay click, you could have one shorted horn that blew the fuse. If the fuse is blown, unplug both horns, then replace the fuse and see if the relay clicks. If it does, plug one horn in and try it again. If the fuse blows, that horn is shorted.
If the fuse is not blown and you don't hear the relay click, you'll need to measure the voltages on the relay terminals. One will have 12 volts all the time. A second one will have 12 volts only when the relay is plugged in. That one should drop to 0 volts when you press the button. If it doesn't, the switch or wiring to it is bad. If that is the case, you can remove the cover of the relay and press it by hand to activate it. The horn should blow.
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Saturday, August 25th, 2012 AT 12:12 AM