I can't get my A/C compressor to kick on for some reason. When I put it in storage a year ago it was working fine. I suspect that I had a slow leak & I have lost pressure in the system, however I am not able to get the compressor to kick on when using a jump lead & bypassing the low pressure switch. It's not locked up. I have checked the fuse & relay under the hood.

Any ideas, suggestions?

Maybe I am not jumping it correctly?

Adam.