Ac compressor 89 190e 2.6
 

My ac was working fine until a few days ago now blows hot air only. Jumpered wires at the drier aux fans work compressor not engauging.
each time i start engine a loud sound comes from compressor.
Which wire at compessor carries voltage and how much?
How do i hot wire compressor to tell if working?

I'm not sure there's anything else that can serve as a better indicator of a possible bad compressor.