Well it finally happened to me. This morning I went out to start the truck and it would not start. I tried to cycle the glow plugs. I even have a timer I use set for 1 minute I use typically. But nothing would work this morning.
I hooked up my AE and ICP is 1700-2000psi while cranking, EOT reads 43*, AIT reads 40*. Then I tested the glow plug relay and it would click but not have any power on the intermittent side. I tried tapping on it and still nothing on the intermittent side. So I picked up a new relay from Kragen(Borg Warner) and it fired right up. I know Kragen is not the best relay but I will get one from Ford to carry with me. Power was working correctly when tested as well.
Thank you everyone who has posted about this problem so we can search the site for the info when needed.