Voxbell Horn wiring

[GT]

My Voxbells are playing up! When all wires are connected they both vibrate, but do not make more than a muted horn sound. If I take one wire off the 4 terminal horn the 2 terminal one works fine and the 4 terminal not at all. If I take one wire off the 2 terminal horn the 4 terminal one just clicks and the 2 terminal one of course is dead. I have not started the bike because the oil cooler is off. Is it a wiring or voltage issue?

GT

 

[Rob]

Connect each horn direct to the battery to confirm each horn is OK.  You may find one horn is rusted solid hence the click. If both are OK, then - since you have volts at the horn - check the earth connection through the horn button.

 

[Grant]

Connect each horn direct to a battery.
Use a Phillips screwdriver on the crosshead screw on the back of the horn, usually has a dab of white paint on it.
Screw it in and out several times and usually the horn starts working again.
This cleans the contacts inside as they normally rust up through water ingress and lack of use.

 

[RCGBOB44]

For what it's worth my Voxbells gave up the ghost just after the ark came to rest anf i rteplaced them with Fiat wind tones via a relay.  Very good indeed but then I'm not a purist, but they do look rather good in chrome in place of the Voxbells.