Repairing a horn

[phillvr6]

Anyone know anyone in the woking area who would be able to repair my horn prior to an MOT.

I've tried to change the horn but it appears to be a fault with the wire between the switch and the horn.

Thanks,

Phill

[dern]

Unless you've blown the fuse in which case you've probably got a short somewhere it's most likely going to be the switch. So check the fuses first and if they're all ok get some electrical contact cleaner, take the switch apart and give it a good clean. Chances are that the contacts have corroded. If you have blown a fuse then simply check the wiring for places where the insulation has been rubbed away. You can test the horn itself by disconnecting it from the loom and connecting it directly to the battery briefly.

[Chilli]

Really not sure mate...However, can we please refer to it as a beeper or somethnig....Referring to it as your horn....dunno, just sounds very wrong!!

[phillvr6]

dern said:

Unless you've blown the fuse in which case you've probably got a short somewhere it's most likely going to be the switch. So check the fuses first and if they're all ok get some electrical contact cleaner, take the switch apart and give it a good clean. Chances are that the contacts have corroded. If you have blown a fuse then simply check the wiring for places where the insulation has been rubbed away. You can test the horn itself by disconnecting it from the loom and connecting it directly to the battery briefly.

Cheers for the advice but already been through that lot. The fuse for the horn also look safter the rear light. The rear light still works so its not that. Also had the switch apart and its clean as a whistle.

Initially the horn was working but very quietly, I tried swapping it for a new horn which had the same problem. Therefore, As the horn itself works, the switch is clean and the fuse is till ok, I'm hoping its a case of a wire having rubbed against the frame.

[catso]

Is there just one wire? if so the earth connection might be bad - corrosion between horn body and frame?

[dern]

phillvr6 said:

Cheers for the advice but already been through that lot. The fuse for the horn also look safter the rear light. The rear light still works so its not that. Also had the switch apart and its clean as a whistle.

Initially the horn was working but very quietly, I tried swapping it for a new horn which had the same problem. Therefore, As the horn itself works, the switch is clean and the fuse is till ok, I'm hoping its a case of a wire having rubbed against the frame.

I would have thought that if the positive feed to the switch had rubbed through and earthed the fuse would go as soon as you connect the battery and if the circuit after the switch was earthed the fuse would go when you pressed the horn switch. If it's not blowing at all I would have thought that either you have a dodgy connection (which I imagine you've checked) or some part of the wire in that circuit has broken down. I suspect that you might be able to trace which bit by measuring the resistance of the wire between the switch and the battery and between the switch and the horn. Then you could splice in a replacement bit of wire.

Going back to your original post it looks like you're looking for someone to do this for you - sorry for not reading it properly and I'm afraid I don't know anyone.

[rich_vw]

Handy tips, cheers, discovered over the weekend its my beeper blowing the fuse every oportunity it gets, trying to reframe from using the dam thing now!

[phillvr6]

catso said:

Is there just one wire? if so the earth connection might be bad - corrosion between horn body and frame?

Nope, two wires.

[phillvr6]

dern said:

or some part of the wire in that circuit has broken down. I suspect that you might be able to trace which bit by measuring the resistance of the wire between the switch and the battery and between the switch and the horn. Then you could splice in a replacement bit of wire.

Going back to your original post it looks like you're looking for someone to do this for you - sorry for not reading it properly and I'm afraid I don't know anyone.

I think your spot on, however I'm struggling for time this week and it needs MOTing by Saturday so was hoping to find someone local to do it.