A 2005 Sprinter---- Old Control Head Communicates - Switch Turns On & Off Compressor - Compressor Pressures Perfect -Switch Turns On & Off Recirculate- But Temp Control Broken Spins Freely - The red Led Lights on Recirculate and Compressor Work -Blower Speeds Work Fine-And It Communicates With scanner And PCM --------New Control Head -Compressor Switch Does Not Turn On Compressor Or Light Up - Same With Recirculate Switch - No Red Led Lights Work-Blower Speed Works Fine- Will Not Communicate With Scanner Or PCM - This IS A New Part Supplied By Dodge Confirmed Correct Part Number And I Had Them Replace IT Twice Because IT Should Be Plug And Play Any Suggestions Would Be Appreciated