While chasing down the elusive Feddback Potentiometer problem on my 87 190D 2.5 N/A, I think I have a A/C compressor clutch INOP. Chased everything from the PBU forward and it seems OK...finally, I jumped BAT power to the blue wire on top of the Compressor and got nothing.....anyone done one of these? Any idea on the getting puller the FSM shows? Thanks in advance....Clip BTW Who sells them?