2006 didge mega cab 5.9 diesel..A/C clutch will not engage...Dealership dianosed a bad a/c compressor coil..I did not let dealership do the 1635.00 job...I purchased NEW replacement parts and had a local shop do the install...the a/c clutch still does not kick in...matter of fact, the mechanic could pit juice to the old a/c compressor and the clutch would engage....now I am out 800.00 and still no working a/c.....HELP please !!

Twstn79, Try checking the fuse and relay located in the power distribution box in the engine compartment. There is a legend on the inside of the cover to tell you which fuse and relay to check. For the relay, just switch it with the horn relay and try the horn to test this. Check the plug at the low pressure switch to see if there is power there. It is the low pressure switch that sends power to the clutch to engage it. If the fuse and relay test good and you have no power at the low pressure switch plug then the problem could be in the wiring and will have to traced. If there is power at this plug then check the switch itself. The switch can be checked with a DVOM meter. Check the switch, with the engine off, for continuity. If you get no reading then the switch will have to be replaced. Another possibility is the switch in the dash panel and/or any associated wiring. Good luck with this.