With the truck running, I put the jumper in the relay socket and the clutch pulled in. There are only 4 pins being used on the relay, 2 for power and 2 for the relay that would close if everything was good. I checked the low pressure switch ( at least I think it was the right one ) , right next to the refridgerent service pipe, pulled the plug and jumped it, no dice.

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2000 XLT 4 Door Super Cab
4X4 with off road pkg. Harvest Gold
3.0/auto /4.10/ 8.8L/S / Full power everything mostly stock