PWM cooling fan(s) control using ECM

[dontlifttoshift]

Yep, transducer goes in the high side and becomes an input.

The wire that runs from your AC controls to the compressor also becomes an input.

Then a wire runs from the ECU to the compressor, that is an output. Also need an output from the ECU to the C6 pwm fan controller.

The output to the compressor will not run unless it sees 12v in from AC controls _and_ pressure is between 30 and 400 psi, matching Vintage Air's cutoff on their trinary.

The fan control side has been covered in this thread already.

The problem you may have with the HP is limited number of I/O available.