- Horn.jpg (108.28 KiB) Viewed 2185 times
Anyone ever fixed one of these?
Dead horn...
Dead horn...
I just picked up a really nice looking chrome centred Bosch horn that looks like it's never been used:
Problem is it doesn't work. No spark when I connect a battery and no sound whatsoever. I thought these things were a simple coil and therefore pretty foolproof, but I was clearly wrong. There's no way of opening the thing up and I've already played about with the screw (turned it in and out) to no effect.
Anyone ever fixed one of these?
Problem is it doesn't work. No spark when I connect a battery and no sound whatsoever. I thought these things were a simple coil and therefore pretty foolproof, but I was clearly wrong. There's no way of opening the thing up and I've already played about with the screw (turned it in and out) to no effect.
Anyone ever fixed one of these?
"Never argue with a fool, onlookers might not be able to tell the difference." Samuel Clemens
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Kurt in S.A.
- Posts: 1657
- Joined: Tue Aug 03, 2010 12:08 pm
Re: Dead horn...
What does the other side look like? Horns should work one of a couple of ways...power in one terminal, out another terminal to ground; or power in to one terminal and the mounting point becomes the ground path back to the battery.
Kurt in S.A.
Kurt in S.A.
Re: Dead horn...
Here's the back view:
There was a blob of sealant over the screw head that I removed...
- DSCN0706.JPG (63.52 KiB) Viewed 2162 times
"Never argue with a fool, onlookers might not be able to tell the difference." Samuel Clemens
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George Ryals
- Posts: 510
- Joined: Tue Aug 03, 2010 10:22 am
- Location: Stone Mountain, GA
Re: Dead horn...
Give it a whack with a broomstick. Maybe the points are stuck.
Smile it's contagious!
'74 R90S, '67 /2 Conv w/sc, '66 R50/2
'74 Harley FXE, '72 Harley FLH w/HD sc
'69 BSA 441 Victor Special, '74 R90/6 Basket case
'85 R80RT wreck for parts
'74 R90S, '67 /2 Conv w/sc, '66 R50/2
'74 Harley FXE, '72 Harley FLH w/HD sc
'69 BSA 441 Victor Special, '74 R90/6 Basket case
'85 R80RT wreck for parts
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Rob Frankham
- Posts: 1224
- Joined: Thu Aug 26, 2010 2:11 pm
- Location: Scotland UK, 20 miles from civilisation up a dead end road!
- Contact:
Re: Dead horn...
Put a multimeter across the terminals on the Ohms range. Should show a low resistance. If not try winding the screw in and out to see if it makes any difference. If you don't get any chage afert winding the screw in and out (fully) six or seven ti8mes, it's bound for the bin.
Rob
Rob
Re: Dead horn...
Big thanks to George and Rob!
Ran a multimeter across it to start and it read 1.00 which was bad. Then I hit it hard (not a broomstick, but the back of a wire brush) and turned the screw in and out six times and now the multimeter reads 0.01 which is good! After a bit of adjustment with the screw the horn is now sounding fine and ready to go on my restored '74 bike.
Whether it was the "percussive maintenance" or the screw or both I'll never know, but I am indebted to you for your help.
Ran a multimeter across it to start and it read 1.00 which was bad. Then I hit it hard (not a broomstick, but the back of a wire brush) and turned the screw in and out six times and now the multimeter reads 0.01 which is good! After a bit of adjustment with the screw the horn is now sounding fine and ready to go on my restored '74 bike.
Whether it was the "percussive maintenance" or the screw or both I'll never know, but I am indebted to you for your help.
"Never argue with a fool, onlookers might not be able to tell the difference." Samuel Clemens
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moonbeamerll
- Posts: 147
- Joined: Tue Aug 03, 2010 7:43 am
Re: Dead horn...
"percussive maintenance"
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Deleted User 62
Re: Dead horn...
Or yes, you can!ME 109 wrote:Yep, yer can't beat it!DanielMc wrote:"percussive maintenance"
Re: Dead horn...
One of the many charms of wood is that it can be used to beat recalcitrant metal things into behaving properly. 
I've spent most of my money on women, motorcycles, and beer.
The rest of it I just wasted.
The rest of it I just wasted.