I received my new relay and installed it. The problem is now fixed, but this relay works differently than the old in that this one must have the After Glow feature I remember reading about in some other threads.
The GPs light up for 30 seconds then shut off. Once I cycle the key to Start, the GPs come on again and stay on for another 3 minutes, at which point they shut off and stay off. I guess this is the way this particulat Bosch relay is supposed to work, but my old relay (when it was working correctly) never stayed on once the car was started.
I feel I got a good deal on the relay (Sorry Phil, but I had to go with the best deal) Bosch relay and 4 Bosch glow plugs for $98.43 at ******** AZ part # 0250201953 And free shipping