FIRST OFF.... I know its bad to buy a part because someone said that may be it. However, the truck is in the boonies and the nearest part store was 60 miles away. Taking a $59 chance was worth it. Especially considering that the relay is known to cause issues. If nothing else, I would have had a spare for the future.
As far as the oil pump is concerned. I checked the oil in the resvoir and it was at the normal level. Also, like I said, the truck was putting out a lot of white smoke. That would tell you the HPOP was working, or the injectors would not be operating.
So anyway, to sum it up... the glow plug relay was bad, I took the cover off of the hot side and the plastic on the solenoid was melted... I put the new one on, hooked my batteries back up, and she fired right up.
I did figure out how to test it finally, just used a multimeter. One side is hot, the other is not. When you turn the key on, both sides are hot.
All in all, here is what it cost me to diagnose and fix:
Chilton Super Duty book - $19.99
Digital multimeter - $19.99
Cam sensor - $34.00 (Didn't actually need this, but I have a spare now)
Glow plug relay - $59.99
Total - $133.97