gpz 500 horn stopped working

nigel_robbins · Two Stroke Sniffer Joined: 27 Jan 2011 Karma :

I was riding into London near Marylebone when my horn started and wouldn't stop. Everyone moved out of my way and I got to work quickly Smile

It eventually stopped and blew a fuse.
I replaced the fuse and it blew again when I pressed the horn button.
Any idea where I should start looking to fix the problem ?
Thanks.

Islander · World Chat Champion Joined: 05 Aug 2012 Karma :

Get your multimeter out and check the horn feed. It'll either be shorting to earth somewhere in the wiring or the horn itself will be faulty. You can prove the horn by testing its resistance with it disconnected. If it measures zero ohms then there's your problem right there. If it has a resistance then you're going to have to test the wiring back to the horn button and find out where it's earthing out. If it's the wiring it'll probably be in the section of loom that runs between the handlebars and the horn itself - it'll probably have been chafing against the frame.

Efes123 · World Chat Champion Joined: 08 Sep 2011 Karma :

Sounds like a sticky microswitch in the horn button. When you push it does it pop out again, or stay in? You probably can't hear any clicking do to the horn blaring I suppose Smile

Srip the switch and give it a good clean.
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nigel_robbins · Two Stroke Sniffer Joined: 27 Jan 2011 Karma :

Thanks for the replies.
It turned out to be faulty horns.
I bought two new ones and it's fine now.

Rogerborg · nimbA Joined: 26 Oct 2010 Karma :

Can't say we didn't get closure on this thread. Thumbs Up

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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

Thorn · Banned Joined: 07 Oct 2012 Karma :

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Major Doss · Traffic Copper Joined: 09 Jan 2014 Karma :

I don't think that the horns were the initial problem. OP must deliver moar info. When you consider it has taken over 2 years to push his bike home from Marylebone...