PWM for fans, will this work?

[Larry R]

I am wanting to power and control my two Spal fans from my Holley HP ECU via a PWM controller (the Ford Fusion version) and have come up with a plan. I know this has been discussed at length in another post bout I would like to get some opinions as to whether or not this will work. Pictured below is a schematic I have hand drawn and a photo of what I have set up in the input/output of the ECU.

[andrewb70]

I don't see why not. If I had AC I would use CTS and AC pressure as well.

Andrew

[Larry R]

Originally Posted by andrewb70

I don't see why not. If I had AC I would use CTS and AC pressure as well.

Andrew

Thank you. Larry

[andrewb70]

Larry,

I just looked at the schematic again, and I would add a 40amp breaker between the battery 12v+ and the fan controller.

Andrew

[Larry R]

Originally Posted by andrewb70

Larry,

I just looked at the schematic again, and I would add a 40amp breaker between the battery 12v+ and the fan controller.

Andrew

Ok, I will. Thanks for your help. Larry

[waynieZ]

Great time for this question, thanks for posting.

[Jr]

Originally Posted by Larry R

Ok, I will. Thanks for your help. Larry

Why do you prefer the ford pwm over the Chevy? Is one that much better than the other?