Kerry: The solenoid is attached to the IP. It's under a "cover" on the top of the pump. You could use a screwdriver or stethoscope touching the cover to listen for clicking.
Test light to B+ means one end of your test light is connected to the battery positive lead. When you touch the glow plug electrical connection point you're looking for a path to ground.
While these suggestions are all designed to help troubleshoot, I also believe you'll be needing a pump. Diesel911's information helps you test the pump instead of diagnosing by elimination. Here's a page with more information than the typical service manual:
» Stanadyne DB2 Fuel Injection Pump » Motor Mayhem
I have a 5/8" 5 point crow's foot here which is a great help when disconnecting fuel lines from the IP.