Seems that contact with the top part of the "D" fuse was "sloppy". Top retainer contact with the hole in it was up too far, so I reamed the hole in it & bent it down & put a new 16amp fuse in. Cleaned,checked,& compared all fuse seatings for tightness,connected battery. Started car & let idle to operating temp. All seems well. Thank you all for direction,diagrams,& inputs. Investigation/testing of aux.fan & relays for AC & heat continuing.