PWM cooling fan(s) control using ECM

[Z06vette]

After reading thru this entire 35 pages, I have a question on the fan controller. Right now im running an LS2 w e38. The e38 was from an 08 2500 6.0 truck w clutch fan. I am NOT looking to run the fans in PWM, as my harness is wired to run them on/off. I have a guy that tunes for me w efi live. We eventually got the ecm to work the fans, but they pulse the when running. He can command both fans and they run full speed with no pulse. I believe I am missing the "discrete" setting..., and it is still in PWM mode. This is my first e38 after many 411's in numerous swaps. Also, I am running a trinary switch for the AC. Is there any ecm settings that need to be altered to make all this work together?
Great thread, and thanks for the help.
Scott