1975 280C question - Mercedes-Benz Forum

 
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post #1 of 4 (permalink) Old 02-28-2010, 05:09 PM Thread Starter
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Date registered: Feb 2010
Vehicle: 1975 280C
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1975 280C question

Hello, I forgot to ask this in the previous post. The horn and wipers on on the same fuse but when I changed it, it blew out immediatly. What could be the problem? A short somewhere? Where would I look to fix this?

Also, does anyone have a diagram of everything under the hood? Or even just a vacuum diagram?

BTW, I posted earlier today with questions about my seatbelts and some other things. I put several pics in there too...just incase you wanted to check that out and help me.

Thanks,
Kayla
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post #2 of 4 (permalink) Old 03-02-2010, 06:46 AM
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If your new fuse blows instantly, than there is a short somewhere. You can test it by disconnecting all wire from the fuse and connecting them one by one. Than you know which causes the problem. If you have a multimeter you can test it too.

Most likely it is the horn, but it could be in the wipers too.
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post #3 of 4 (permalink) Old 03-09-2010, 10:22 AM
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You can try to detecting the short connection one by one. The easy way is disconnect the wiper rotor cable. If your fuse is not bow up, then just there some short connection. If still blewn up, then try to disconnect the horn wire and try the previous step, so you can make sure one or both between horn or/and wiper that has short connection.

Hope helpfully

W123 280 1979
W115 200 1976
W124 300E 1991
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post #4 of 4 (permalink) Old 03-09-2010, 11:02 AM
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The most likely culprit is the horn. I had the same issue, and it was a quick fix (I would later buy new horns from eBay).
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