Its MOT time again and as usual the bloody horn won't work. Not the horn itself, thats fine when put across a battery but when connected to the bike - nothing! Everything else works fine and there is no obvious problem with wiring. Its driving me nuts - any suggestions?
Bike is a 2009 250EXCF 6 days.
Dead horn.
-
Dominic
- 500cc MXER
- Posts: 518
- Joined: Sun Dec 30, 2012 11:35 am
Re: Dead horn.
I'm sure you've checked the fuse... in which case grab a multimeter to see if there is power reaching the horn and if not trace backwards from there.
-
Jdstar
- 120cc Thumpstar Pro
- Posts: 22
- Joined: Sat Dec 22, 2012 6:22 pm
Re: Dead horn.
Yeah - I checked the fuse. That was the cause it wouldn't work MOT before last. Older bike though and the blown fuse next to the battery meant no starter but everything else is OK this time. Guess I just have to spend more time on it!!!
-
gavinskii
- 400cc Thumper
- Posts: 320
- Joined: Mon Dec 03, 2012 5:54 pm
Re: Dead horn.
Its most likely the switch 
-
fallenmikethebike
- 250cc Trail Rider
- Posts: 62
- Joined: Sat Dec 08, 2012 9:56 am
Re: Dead horn.
Oxidation of the contact surface, usually it means a disassembly and scrape, sometimes firing a bit of contact cleaner in there will do the job, but the first option is more reliable.
Mike
Mike
-
Jdstar
- 120cc Thumpstar Pro
- Posts: 22
- Joined: Sat Dec 22, 2012 6:22 pm
Re: Dead horn.
Thanks - that did the trick - well it was GT85 and some compressed air. Its not 100% but it passed the MOT so I'm happy. Can these things be taken apart and cleaned? It looks like a sealed unit!
-
Jdstar
- 120cc Thumpstar Pro
- Posts: 22
- Joined: Sat Dec 22, 2012 6:22 pm
Re: Dead horn.
Thanks - that did the trick - well it was GT85 and some compressed air. Its not 100% but it passed the MOT so I'm happy. Can these things be taken apart and cleaned? It looks like a sealed unit!
-
newsh
- 350cc Veteran
- Posts: 150
- Joined: Sat Dec 08, 2012 11:31 pm
Re: Dead horn.
Take the switch off and turn it up side down, carefully drill the hollow rivets so that you can pull the switch apart. pull apart over a cloth on the bench in case any small parts drop out. Clean the contacts and smear some silicon dielectric grease on them, stick the little ball and spring back in the light switch with a dab of grease and reassemble. I've done this with a few of these switches, works a treat. You'll probably find the switch is full of mud.