Electronic climate control

[bobbyfresh]

Can someone help whith a diagram or info on how the climate control works -I have fitted new switches -however none of the stepper motors work except the interior fan,the aircon does switch on , if i earth the board i do get them to work, there is a computer type harness connected to the controls where does this harness go? is it controlled through the ecu? Please help im desperate and in South Africa (which is desperation in itself)