Hello, I've come across an odd problem. The car is a Renault Scenic RX4 ,'01 model. The compressor clutch doesn't engage unless I provide power directly from the battery. When I do, the ac does blow cold air in the cabin as is set. Fuses, both in the cabin box and engine compartment seem to be fine. Any ideas on how I could fix this? Is there a wiring diagram for the AC unit? Thanks!