Following Brian's instructions I tried to test like this:

Tested battery got a 12.5v reading.

Then while in #2 key position placed black to ground and red to
the glow plug (touching the exposed plug right below the head)

I got no reading at all.

My test meter instructions say use black for the -pole so I did
it that way (taking from the +/- discussion that it doesn't matter).

Did I do it right?

I didn't test the old ones for resistance because I'm not sure
how to do that. I know I can find the instructions via the search
function so I'm doing that now.

other question:
Manifold was removed but not the injector lines. It was
incorrectly reattached and 3 lines are bent significantly and
one is pushed out of place so that the clip won't reattach. None
of them are broken though.

__________________
k. darkman
1987 300D Turbo 200k