You are only triggering the fan from the sensor in the radiator? Not from an output from the engine ECU?
No, only from the radiator sensor. It works well, and is fairly simple. I’ve also wired in a bypass, both ways. I can turn it on full blast/full time, or turn it off.
It is certainly possible to do it from the ECU on the Hemi - I’ve just never taken the time to figure it out. To me, it’s also a bit easier to troubleshoot if something goes wrong.
Ya know, simple mind and all…