Thirdbird-- thats an interesting idea. Are you suggesting I put in a 12 oz can and see if the pressure is sufficient to engage the clutch?

This is on a 2000 Jaguar that has been in storage for 10 years. A/C was working when it was mothballed. Low side pressre is 15 PSI and high side is 25. Just guessing, but most likely the pressure switch won't allow the clutch to operate at such a low pressure. How can i charge it up with the compres...

My 1993 jeep has strange connectors. high pressure is a bayonet type and the low pressure is just a female hose type, How do I connect my guages to these?