[MDPotter]

For me, I don't care about idle control since it's worked just fine on my dad's truck. I just want fan control. It would be cool to have the PCM control the fans as it relates to AC, but it seems like a lot of work compared to the diagram we came up with. The only wrinkle with the diodes/resistors route is putting switched power to the fans so that in case the trinary goes bad in the closed position it doesn't run down the battery.

It's not wasted effort! I think we'll probably run with that setup at this point.