Odd little electrical problem

[Keith Chapman]

I have lost the horn, the one on the bike

When I press the button no horn but connect a multimeter to the spades that connect to the horn and the horn button is pressed 12V on the meter. So you would think that the horn is u/s but when the horn is connected directly to a 12v battery I get deafened,

I dont understand why the horn wont work off the button, switch is giving 12v, horn is OK but put the two together I get silence. does anyone have an idea where I should be looking?

 

[Stewart H]

Bad earth ? ie enough to show voltage on the meter but not enough for the horn.

 

[PW Cymru]

Mine had a similar issue but found that the pos wire had failed.

Try another 12v feed to the horn straight off the battery

 

[Popell]

Sounds like a dodgy earth

 

[ELIMINATOR]

Sounds like a dodgy earth

Nice pun.

 

[iftikartaxis]

wires

you can have 12 volts through 1 single strand of wire
conect the wire to a 12 volt lead light that will confirm if the wiring positive is ok give the wire a wiggle whilst pressing the horn button
hope you find it

 

[PW Cymru]

Mine had a similar issue but found that the pos wire had failed.

Try another 12v feed to the horn straight off the battery

Senior moment there, it was a new earth wire to battery not the pos DOH

 

[D6]

earth the horn, ie new wire

 

[Keith Chapman]

Thanks for the ideas, looks like some garage time this weekend.

 

[Keith Chapman]

Well a drop of viagra in the tank and my GS has the horn again.

Traced the fault to a bad earth, all now sorted.