Mea culpa - I just went out to drive my car and found that the oil pressure gauge is pegged all the time, even with the key off. That's what I get for remembering the issue at night. Is the same diagnosis appropriate or am I resigned to tracing wire at this point? Again, thanks for the help.

__________________
1987 300SDL 265,000 mi.
1982 300SD 325,000 mi. (and holding)
1956 Packard Clipper 150,000 mi.