So I installed my reman AC Delco compressor and tried everything I could to get the clutch wire on the truck to give the compressor 12V. At no point will it do that. I even put 2 cans into the system...clutch won't engage. AC light on controller just flashes. What a headache. Is there a way to force it other than to jump the clutch from the battery? Last time it needed refrigerant the clutch engaged after a can entered the system. What could be causing no voltage at the clutch wires?