I was lucky, just had to spray a little "gunk remover" for switch to work. Don't know what blew the fuse then, but replaced and all is well. Hope this helps before buying a switch.

Wiper failure-Combination Switch?

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Nello Tare

1982 300D (266,001 mi.) looking and running great

Previously owned:
1976 450 SLC
1983 300D
1976 300D
also
1982 Jaguar XJ6 (loved, but gone)