My 1986 SL radiator fan doesn't work and I get cool "heat" at highway speed. My search of this board indicates to me that the culprit may be a faulty engine temp. sensor. Since it's only about $30, I don't mind buying one on spec and installing it.

The only problem - Where is it?

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1991 560SEL (254K miles)
1980 Lincoln Mark VI - Givenchy
1979 Lincoln Mark V Collector's Series
1979 Lincoln Town Car Collector's Series
1979 Ford "Effie" Pickup (in gradual transformation to a show/street truck)
1969 Lincoln Mark III (waiting for "Overhaulin" to call)
1989 Lincoln Towncar
2001 Lexus GS300 (spousal unit's daily driver)