PWM radiator fan controller

[1989GTA]

I would recommend going with the C6 setup if you haven't bought anything yet,as long as you have a computer capable of controlling it.

I like the Derale, but I am not happy how much lack of room there is to wire it, and to get to the adjustment, it is impossible to adjust when the car is running.

I do have the E38 ECM and it is pwm capable I have the 2011 Corvette program already loaded into it. I will look hard at the C6 PWM setup. I have HP tuners so the tuning aspect is not a problem. I was already thinking of a 70 amp relay if I went with the Derale setup. You just confirmed that would work. So let me look into what parts I will need for the C6 route. The only tricky part would be the "trinary" switch. I have an "Old Air" setup on the car now so I would have to come up with a solution to that little problem.