I have 2 2007 Dodge 3500's and everyone I've known with the 2007.s has had similar experience. I can't remember how many A/C compressors ive put in these trucks wit none lasting much over a year. I even let tne Dodge house put one in with a 2 year supposed warranty. got about 18 months. I've never gotten more than 7 volt feed to the clutch. I think that it lets the clutch slip. would it help to add a relay to feed the clutch and feed it with the clutch signal??