It sounds like (no pun)you have a bad horn which is drawing too much current and loading down that circuit-> blown fuse. Disconnect the horns at the horn one at a time to find the bad one. Horns are a real current sink.

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Jeff L
1987 300e
1989 300e
1987 BMW 325

[This message has been edited by jeffsr (edited 05-08-2000).]