Get your horn honking again

When it all goes quiet, there are a few ways to get your aural warning device working again...

1 Most horns work by earthing to the handlebar via the button, so the wire from horn to button should be live. Connecting a meter to the button wire, this one isn’t. 2 While the meter’s out, set to resistance (ohms) and check the handlebar is a good earth. Often they are not – especially when rubber-mounted. But we’re OK here. 3 Power is going into the horn and not coming out, but that doesn’t mean it’s broken. Horns have a set of contact points inside – on an old horn they made need cleaning... 4 But here, adjustment is more likely. With the resistance meter across the terminals, back the screw off until the needle swings. Then check it on a battery – wearing ear plugs!