Horn not working properly.

My horn on the bike is very low, when I press the horn switch the clocks dim and a faint noise from the horn, all fuse's are ok, any advice or help please.

[Pete7]

Probably high resistance from a corroded connection or a stuffed horn.

Pete

[Mauler]

Battery?

[timwilky]

Definitely the R/R, one from a honda should fix it.




SV horns are a consumable. I replaced mine years ago with a 10 quid loud plastic device from the local car shop.
You need to get the right one though. cheap earth return is no good on the SV.

[Sid Squid]

Look at the back of the horn, you'll see a screw locked with a dab of paint/lacquer. This is the adjuster.

Commonly if the horn makes a click and uses lots of current, (this evidenced by the lights dimming), the points aren't separating - back the screw out a bit.
The reverse is also true: If the horn makes no noise, (or if you back the screw too far), the points aren't closing - turn the screw in a bit.

If the supply is ascertained as good but the horn does nothing; no noise or clicks, then there are faults that adjustment may not cure - the coil may have failed or the points may be corroded. Usually however if it makes a click then clearly this demonstrates the coil and points are continuous - adjustment may well cure the problem.

[Shawthing]

Too much heat from the radiator ( especialy in these weather conditions) can affect the std horn's performance. Check it out both Hot and Cold.