Quote Originally Posted by edwardb View Post
Zooming in on your power supply, it's only rated at 5-7 amps. That's not a lot and very well might not be enough to start your fan. I have a similar one (same brand) but higher amperage. Mine typically buzzes and indicates over current. But maybe yours doesn't. A quick check of your fan on another source, like a car battery, could tell you if the fan is good or not. Agree the stock fans are on the noisy side and there are others that are quieter with sometimes more capacity. But I've used the kit supplied fans on all my builds with no issues. The fan is barely heard, if at all, when the car is running and driving. These cars are a bit noisy if you haven't heard that already.
Great call out Paul. It did cross my mind that without a relay there might not be enough oomph coming out of that unit as that's what it sounded like. At this time I am not inclined to change out the fan, just need to confirm it works. I am not sure about this but I also have a Power Probe which may suffice to test it. I'll probably research that a bit and see.

I had asked a standalone question on the forum before I ordered my kit re: PWM fan control with the Coyote. Sounds like it's fairly rare in this group but I intend to install one. Between the soft start, lower noise and variable speed it should eliminate fan noise concerns. But, like you said, fan noise is just a little more background music with these cars.