PWM for fans, will this work?

[Larry R]

Originally Posted by Jr

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

To the best of my knowledge, they are identical. I avoided the "Corvette tax" by purchasing my Ford Fusion units new off eBay, so my motive in getting the Ford modules was cost.

That said, when I hooked mine up today, including the 40 amp breaker, as soon as I connected the ground wire to the PWM, the fans came on. This is with the cold engine not running and the key off. I cannot yet say it is the fault of the PWM module or a wiring error, more research is necessary.

I hope Andrewb70 will step in here. Larry

[Larry R]

UPDATE!!! It works! After I fixed the wires I had inadvertently crossed, it works as advertised. My schematic is good. The fans came on as I had set them up in the input/output section of the ECU. I ran the A/C and it still maintained the prescribed temperature. My thanks to all who offered help and encouragement to me in this project. I will take it our for a freeway cruise soon to give it a real test.

[carbuff]

For anyone that may want to do this in the future, do you have the part number for the controller you used?

[Larry R]

Originally Posted by carbuff

For anyone that may want to do this in the future, do you have the part number for the controller you used?

The part number for the PWM controller I used is: FOMOCO 6E53-8C609-AA

the Corvette P/N that I have for the controller is: 10377609

These two controllers look identical except for the printing on them.

I suggest reading through this series of posts, there is a wealth of info there. It is a bit long but in my opinion worth it. There is info there for the connector and related items.

https://lateral-g.net/forums/showthread.php4?t=40215

[Ketzer]

I read through quite a bit of the other thread but didn't see this asked...

Is this method of controlling the fans better than using a fan module from one of the wiring or radiator companies?

Jeff-

[Larry R]

Originally Posted by Ketzer

I read through quite a bit of the other thread but didn't see this asked...

Is this method of controlling the fans better than using a fan module from one of the wiring or radiator companies?

Jeff-

I really cannot say whether it is better than an aftermarket controller. Better is subjective; this method requires an ECU, whereas most aftermarket controllers are stand alone. PWM or pulse width modulation, has the advantage of being able to run the cooling fan(s) only as much as they are needed and that can be programmed, as I did in my Holley HP ECU. I do believe there are some aftermarket PWM controllers out there. Many, if not most, new cars use PWM controllers because It is more fuel efficient as well as extending the life of the fan(s), not to mention quieter than having a fan roaring at high speed when it is not needed. Hopefully others will chime in as I am far from an expert. Larry

[andrewb70]

Originally Posted by Larry R

I really cannot say whether it is better than an aftermarket controller. Better is subjective; this method requires an ECU, whereas most aftermarket controllers are stand alone. PWM or pulse width modulation, has the advantage of being able to run the cooling fan(s) only as much as they are needed and that can be programmed, as I did in my Holley HP ECU. I do believe there are some aftermarket PWM controllers out there. Many, if not most, new cars use PWM controllers because It is more fuel efficient as well as extending the life of the fan(s), not to mention quieter than having a fan roaring at high speed when it is not needed. Hopefully others will chime in as I am far from an expert. Larry

That basically covers it.

Andrew