Just finishing up getting all of the A/C components pulled together and installed on my LS but was wondering what others have done for the rad fan control when the A/C is running. I am running the original truck ECM and have the ECM controlling the dual fans at two different temps. My question is : Is there a pin on the ECM I can tie into that will turn the fan on while the compressor is engaged or is there a better way other than just using another relay feeding directly from the compressor to the fan relay