BMW 525i Air Conditioner Compressor

The Ac Compressor Clutch Doesn't Seem To Engage When The Ac Switch Is Turned On. The Fuses Related To The Ac Circuit Are Ok. I Have No Idea...

Recently I Had A Melt-down In My Wire Harness. After A $2300 Repair Job I Still Have No Ac. All The Fuses Are Good, The Mech Has Replaced...