When I turn on ac switch to # 1, I can hear mazda ac compressor running and RPM increases but the blower is not running. My blower works only # 3 & 4 where compressor is not running no more even the a/c switch light on the panel goes off.

I tried to connect compressor direct to a (+) battery terminal, the a/c runs fine but RPM goes very low, it seems like its about to stall.

Whats wrong?