question Horn help

[gazzaw]

Hi

 

Got an old jeep horn that had the terminals loose and I took off the front cover to replace posts and refasten inner wiring etc. Replaced everything and put current through it, but although the solenoid/electro magnetic coil buzzing, it is not 'honking' the way it should. Is there a way to adjust the diaphragm travel (seem to remember big nut in middle rear of casing -does this affect travel or spacing between magnet and diaphragm)

 

Anything else I should be looking at -the horn on vehicle before was working ok (but more modern) so circuit to horn has power and no fault there.

 

Any more internal adjustments I should be checking out?:blush:

 

Thanks

[Bodge Deep]

percussive maintenance again... whack it with a mallet... no really it works... they stick... if you thump it whilst its working it'll more than likely start working again... worked on several old horns i've had... ohh err!

[gazzaw]

thanks will whack at eariest opportunity, I think it has been decades since it was last used

 

Gary

[gazzaw]

gave it a strip down, all the electrics working fine but it buzzes only, noticed a threaded hole in backplate which goes to what looks as though it is used to adj tone but bolt missing -tiny BA sized thing with a fine thread. whacked it a few times whilst pressing a rod into the hole and it improved but was intermittant -so I guess it is still sticking and I need a small screw into the 'adj' hole. Or start looking for a new rear end

 

Other thing I'll need to look at is the contacts on the electromagnet/solenoid -looks like a set of points contacts

 

Gary

Edited April 22, 2010 by gazzaw

[panelvan]

i hope i right in saying this but is it earthed to bare metal properly. it wont work if it does not have a good earth.

[desperatedes]

most horn units i have come across do have an adjuster screw and locknut. operate horn turn screw to desired tone and do up locknut. beep beep!

[gazzaw]

Thanks Guys for the replies, will hook it up again next week and see if I can get a honk out of it

 

gry