Hello

does anyone have a wiring sketch for the compressor circuit on a 2003 a4 1.8t?

It appears to have 4 wires at the compressor, 2 in front and 2 in back. is the one in back of the compressor a low pressure switch? I assume the ones in the front are for the clutch.
My ac guy thinks that this compressor is a variable compressor, i think it is only on and off.
would i be able to run it by applying 12vdc to the compressor?

thanks in advance.

 

i know there is a clutch circuit but is there a magnetic control valve circuit and if so what voltage can i apply to it..