Just bought 2001 2500 Cummins. The a/c clutch fuse blown replaced a/c ran 3-5 min blew fuse. Check wiring at compressor appeared to be frayed so I by-passed connector and hard wired. Replaced fuse and blew again. I cut the wires replaced fuse and it did not blow but of course a/c clutch not engaging. Could the clutch coil be causing this and how hard is that to replace. Does not seem to be much room to work so would I have to discharge system. Are these parts available. Thanks for help!!!!!!!!!!!!!!!!!!!!!