As I stated earlier the 80A fuse was fine.

I purchased the glow plug relay yesterday and replaced it this morning before work - took about 20 mins (the screw that holds it to the fender on the right side is tough to reach with all the stiff wires from the headlights in the way).

I tried to start it and SUCCESS!!!

I noticed that the glow plug relay I pulled out was stamped '05/84' which indicates that this is the original one. The fact that it lasted ~18 years is pretty incredible.

The piece of diagnostic work that I did that I think is probably the most reliable (and easiest) was the fact that the voltage across the battery did not droop at all when the glow plug relay was _supposed_ to be energizing the plugs. That method is only useful if you are really confident that your plugs are in fine shape (mine were less than a year old, and this car has never failed to start even in the coldest weather).

Chris