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Old 08-02-2002, 02:43 PM
Keith Lucy
Posts: n/a
Honking horn blows a fuse

I was driving along yesterday and went to honk the horn. I got nothing.

I checked the other horn (the 560SEL has a button to select the horn to use) and again I got nothing.

When I checked the fuse, it was blown. I replaced it, and checked it with horn #2, and everything was fine. When I switched back to horn #1, it blew the fuse again.

I plan to disconnect horn #1, press the horn, and see if the fuse blows, if not I will replace the horn itself.

Now for my questions -

1. Where is the "American" horn? It's the one that get's used when the horn switch has the rear side of the rocker depressed.

2. What to I do next if disconnecting the horn and pressing the horn switch still blows the fuse?

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Old 08-02-2002, 03:16 PM
Join Date: Jul 2001
Location: Old Lyme, Connecticut
Posts: 3,596

I am not sure where your horns are mounted but on my 300E they are very close to the airconditioning heat exchanger in front of the radiator. The wires were touching the fins on the a/c unit and wore through the insulation giving the same result. I just repaired this morning and also bent the wires away from the sharp fins on the heat exchanger. Hope this helps, Jim
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)
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Old 08-03-2002, 02:27 AM
Registered User
Join Date: Jan 2001
Location: oregon
Posts: 2,013
most horns are a ground interupt circuits so would have to guess that the problem is in the horn itself as if you had a bad spot in the hot wire it would blow fuse as you put it in......
William Rogers......
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