horn sounding on its own

deMort · 31 Jul 2018

searider said:
deMort said:

I guessed at a 2002 model and the wiring diagrams are below.

Relay board is o/s/f and above the fuse board .

GP2 .. or any GP on a wiring diagram is an earth point with the number as the location .. an earth basically .

Brown wire.

Click to expand...

Thanks, mines a 1998, I'll have a look.
I assume that if I can hear the relay clicking it's ok?

Erm .. no .

It may click but if the contacts inside the relay are burnt it wont make the connection between 30 and 87 .

You should have 12 volts on term 86 with the earth on 85 only there with the horn pressed .

term 30 will be 12 volts with term 87 being the output to the horn .. if you bridge term 30 and 87 with a bit of wire then the horn should work ..

searider · 13 Nov 2018

deMort said:
searider said:

deMort said:

I guessed at a 2002 model and the wiring diagrams are below.

Relay board is o/s/f and above the fuse board .

GP2 .. or any GP on a wiring diagram is an earth point with the number as the location .. an earth basically .

Brown wire.

Click to expand...

Thanks, mines a 1998, I'll have a look.
I assume that if I can hear the relay clicking it's ok?

Click to expand...

Erm .. no .

It may click but if the contacts inside the relay are burnt it wont make the connection between 30 and 87 .

You should have 12 volts on term 86 with the earth on 85 only there with the horn pressed .

term 30 will be 12 volts with term 87 being the output to the horn .. if you bridge term 30 and 87 with a bit of wire then the horn should work ..

Thanks all,

To close this out I changed the relay which made no difference.
Two new horns and the problem is sorted.

Duncan

horn sounding on its own

deMort

Monaco

searider

Silverstone

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