Don't overlook the 30A strip fuse, failure of which will cause the blower not to work. It's located in its own small, plastic, lidded enclosure somewhere around the top of the left strut tower (going from memory here). Mine failed and the failure was basically invisible until I started to remove the fuse, then the break in the metal strip showed up. I soldered mine until I could get a replacement, which caused a bit of a ruckus on the board.
http://www.peachparts.com/shopforum/diesel-discussion/306490-30a-strip-fuse-blower.html
Rgds,
Chris W.
'95 E300D, 363K