I went to www.oilburners.net and posted my problem in the 7.3
Powerstroke board.  First response from and admin. the by name of
95_stroker was on the money.  The Under Valve Cover harness had
apparently shorted and burned the pin on the rear plug.  Believer45
from www.freeautoadvice.com had also replied the same thing on their
board where I had also posted.  He sent me a couple of files on
changing the glow plugs and recommended checking/replacing them at the
same time.  Since I know that at least some of the glow plugs aren't
functioning, I'll probably follow that advice as far as I am able on
that side.  Thanks Everyone for the replies and help.
I come here and read most of the posts and ALL the posts on the
diesels and have appreciated every bit I've learned these past years.
Ya'll keep up the good work.

Chas