ok....seriously. i'll explain how you should go about this if you want to do it yourself. first off if there is no freon in the system the clutch WILL NOT engage period. that is a safty feature so you dont burn it up. the freon carries the oil around the system to lubricate the pump. take a mini screw driver and push in one of the ports. if nothing comes out you have a leak.....something probably needs to be repaired. go ahead and put the right amount of freon in. this is an important step. too much freon and your pressures will spike causing damage to the condensor, evaporator, etc. i do believe they sell freon with dye in it already. put in the freon and let the ac run for about 10-15 min. you really need to put the system into a vacuum to get all the moisture out, but you dont have the right equipment for that. next get a black light and look for dye anywhere where ac would run. all the lines, condenser, compressor, evaportor(watch the water drip hose for dye), etc. i'm really trying to help you when i say find a place that will fill and check for leaks for like 60 bucks. at the very least your ac will be cold for awhile and you'll know what to fix.