I think I'm on the right track!
OK, I got the ol meter out and did a simple test. Removed the six prong connector to the GP relay and started checking the GP's through the wires using the ohm meter.
VIOLA
All checked out with no resistance except #3. It measured .9 ohms.
This must be the bad glow plug or wire.
Now the problem with the 603 engine is getting to the plug. Can't get my hands in there.
Anybody out there done this before without removing the intake manifold?
