Ac not working plus other electrical problems

I have a 1998 Blazer LS Auto Transmisson and the A/C in it hasnt worked since i got it in March. I tryed jumping the switch on the dryer and on the back of the compressor. It has a full charge of freon (it wont take anymore) the clutch will kick in if I wire the clutch to the battery. The relay works when the switch is set to A/C. I also have a problem with the airbag light coming on and going off sparaticly and i have the same problem with the security light doing the same thing but some times i cant start the car for 10 minutes because of the problem with the security

Thanks for any HELP

Automatic or manual AC/heater controls?
What is the low and high side reading with compressor running at idle and at 2000 rpm?

On the anti theft you need to get the body codes and post back codes also same with SIR we need Air bag computer codes.
MT