OK, I picked up a glow relay for $5 at the pull a part. Turns out that wasn't the problem. When I was doing my previous diagnosing, I somehow goofed up. I thought I didn't have any power at the fuse block. When I checked again today, I DO have 12V at the entrance to the fuse block. I also have 12V at the exit from the fuse block and at the first glow plug in line. However, I have 0 volts at any of the other three plugs. Does that mean my first glow plug (#4 cyl) is bad?

Also, any tips on removing the plugs?

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-Scott J
1978 240D