Tried to figure out why my air horn had reduced in noise and would screech in damp or wet weather?
There was some rust on the connections which i cleaned up and that helped a bit, but it still wasn't quite right.
But for some unknown reason i'd bought another one, 7 years ago, and i hadn't even unwrapped the jiffy bag?
No idea why i bought it, but it was an exact replica of the Stebel Nautilus Compact air horn, made by Ring, and was half the price.
So i tried that out and it sounded much more efficient and was more responsive on the horn button so i just did a direct swap and now all is good.
I since found an article saying that the compressor part on the Stebel horn may just need a few drops of oil to get it functioning correctly so i might have a look in a bit, plus the 2 main wires that power it are very easily accessible on my bike to test it out again.