The other day, my horn pooped out, so I went to the junkyard and got three for six bucks, one from a 240D (the other was inaccessible) and two from a Beemer.

The Beemer horns just moaned pitifully, so I soaked them overnight in WD-40 and then, with them moaning pitifully, turned the small adjustment screw. This with only minor fiddling, produced a respectable sound from each horn, one high and another lower.

The 240 D horn was a round drumshaped thing that did not require any fiddling at all. The Beemer horns were made by FIAMM in Italy and had a bell

My question is why doesn't it seem to make any difference which wire is connected to Ground and which to 12V?

My grandfather used to tell me that a flashlight would not work with the batteries in backwards because it was DC. But the horns are also DC.

I am sure there is a simple answer. I'm afraid my physics class did not get into "hardware issues", so please forgive me if this is a truly stupid question.

Will using a relay make the horns any louder? Are the numbers on relays (87, 87a, 30, 86) some sort of standardized code, by the way?

And Danke, Gracias, Merci, Thanks, Shi-shi

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Semibodacious Transmogrifications a Specialty

1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)

"Time flies like and arrow, yet fruit flies like a banana"
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