On a 1999 ford f-250 jumped the A/C clutch dierct and fully charged the system with freon but still the A/C clutch won't engage.

Kelly,Trouble shooting forum links below, the 3rd video show which contacts to cross to get AC clutch to engage.
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Honda Odyssey not working
Compressor Clutch won engage Honda Tech
Troubleshooting AC unit Honda Odyssey 2003

Thats pretty high if the system is not running. Average pressure on the low and high side should be near outside air temp.
Normal low side is 30-40 psi and high side is 200-250 psi when the system is running and the freon charge is full.

There is a low pressure switch on or near the drier that can be jumped, it is also a common problem with them.

Check your a/c fuse first you want to make sure you have power going to the a/c system If your a/c button light is on when you engage it you most likely have power. Second if your a/c system coolant is low of the recomended freon then so the compressor will NOT engage.This is a start!

Has the Freon been checked with a gauge to see if there is enough Freon to allow the system to work. Low or no Freon will not allow the compressor to engage. The low pressure switch is most likely activated due to low freon, and will cause this condition.

If the ac compressor clutch turns on and off constantly, it could be low in freon,make sure it has freon,you can purchase freon cans already set up with a hose and a guage to read your freon pressure
if the freon pressure is normal, check the switch at the accumulator a long cylinder with a switch and a molex with two wires attached to it, with your ac running on high, move your molex it could be making a
bad connection, if the molex is okay, jump out the molex, if the clutch engages and stays running, just
replace the low pressure switch. good luck!

USUALLY WHEN CLUTCH WONT ENGAGE MEANS LOW FREON.

The low pressure switch is located near the rear. If you locate the accumulator assy, it is on that line that goes to the firewall to the evaporator, it has two wire to it, if you unplug it and jump the two terminals at the connector the a/c clutch should engage...you can do when car is running, if it does then either you lost your charge or the switch is no good, switches are very rare, if it does not engage, then you either have bad wiring to the a/c clutch or the coil inside the clutch assy is no good and must be replaced...jump the switch and let me know where you stand at that point and i can offer more support

Jay

not swich on
burnt fuse
faulty relay
faulty relay swith
faulty clutch coil
empty or low freon

the only other thing in the circuit is the pressure switch...unplug/ jump across the connector of the switch to verify circuit integrity and go from there...sometimes this is neccessary to charge freon fully so compressor will stay running to draw freon in the low side.