Re: ahooga horn
As some mentioned it might be a ground issue. However, the simplest thing to check and I have found this problem a good amount of the time. You said you cleaned and oiled it. Specifically what did you clean and what oil did you use?
In order to get the horn to work at its best the armature must be cleaned & polished. Back off on the adjusting screw so the armature will spin freely when the button is pushed, then take some crocus cloth or very fine sand paper and lightly hold it on the armature commutator while pushing the button (move the cloth back and forth to polish the whole commutator). When the commutator is shinny stop, then clean out the grooves with a tooth pick. When you oil the horn use a very light oil such as WD 40. Each spring I have cleaned and oiled all my A's horn such as this for the past 50 years and they all have worked 100% fine never a problem with sound.
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