Took the car to check freon level. Empty...So I had them refill it but the CCU was not hooked up so they could not test if the ac came on. Hooked it back up and no ac. Try to jump 5 and 7 and still no ac as before. But I noticed that the CCU was cutting on and off by itself. Can you replace the harness for the CCU? Brian....what clutch? Fan clutch? The car has been getting hot while idle also. Should the fan run all the time? Where do the leads go to on the clutch?
A

__________________
1987 300SDL
187,000 miles