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Still no progress. Bob, who is looking at it for me had a friend staying with him yesterday. This guy was supposed to be a whizz with electrics but was just as stumped as everyone else. I've checked out the horn and the wiring, especially around the headstock. Bob has gone over it again. Problem is, because the fuse keeps blowing there is not much time to test anything.

Sigh!

Thanks again for your suggestions. If anyone has a brainwave, let me know. I'm a bit bankrupt in that department for now.

sv-wolf wrote: Problem is, because the fuse keeps blowing there is not much time to test anything.

Isn't it easier to check with the fuse out and with the needle prongs of a multimeter or a test light in its place?

Hyperr has the right idea there.

Its kind of obviously a short to ground problem. Test the wire from the fuse where it leaves the fuse box to ground to prove it. It may even be the fuse box connections itself. Move existing wires around until you see the resistance increase.

HYPERR wrote:

sv-wolf wrote: Problem is, because the fuse keeps blowing there is not much time to test anything.

Isn't it easier to check with the fuse out and with the needle prongs of a multimeter or a test light in its place?

Thanks HYPERR. I'll check this out with Bob. I did wonder why he thought it necessary to work on a live circuit, but as I know as much about electrics as I do about brain surgery I just had to accept his word.

Cheers

Richard