I know the batts are good, though you were on the right track.
The retaining nut for the primary batt terminal to the starter was loose. When I went to remove it to have the autoparts store test it, I couldn't get reverse torque on my socket to click the advance. Pulled the wrench, and sure...
Well, I've completed the manual glow, seems to work. Replaced all but 1.5 glow plugs -- I have replaced #4, but can't reach the terminal to plut it back in, and #6 seems to require that I take the exhaust downpipe off the turbo to reach the same point as #4 (replaced, but not plugged in)...
13v at the leads when I jump the GP relay (batt charger on it), and complete wide open when checking resistence at the GPs. Tested 1st & 2nd cylinder on driver's side. Didn't see much point in going further.
So, after replacing all the GPs, how do I avoid blowing them up again? Or will...
Many thanks to you folks for the excellent information. I've only read a few threads (like the manual glow mod), and read the entire thread here:
http://www.thetruckstop.us/forum/showthread.php?26262-94-2500-6.5-turbo-won-t-start/page11&highlight=manual
Unfortunately I bought a non-runner...