PWM cooling fan(s) control using ECM

[LonnieJ]

Thanks Andrew for setting me straight! You have forgotten more on this subject than I'll probably ever know The 5V most be the a/c pressure sensor?

[dhutton]

The voltage swing of the active low PWM signal would be determined by the voltage the pull-up resistor etc is connected to. If you connect it to 12 volts you will get a 12 volt signal.

Don

[jmac]

Wow, what a great thread with a wealth of knowledge from multiple contributors!

I'm very intrigued by this.

From what I've read, can you use the Spal brushless fans alone with PWM control without having to use the controller from the C6 or Ford Fusion?

I'm referring to post #445 from Blake-B.

Is the controller built in to the fan motor?

Thanks!

[samckitt]

A few people have asked me if I had any more of the connector kits for the Corvette PWM module. In the past I had kits that is the connector body, 4 large high amp terminals & seals, a small terminal & seal for the signal, & some blank plugs for the open holes. I am trying to get all the parts for the other connector that is 2 high amp terminals & one small terminal so the fan assy can be easily removed if needed.

If I was to order more to make these kits, who would be interested in them and would you want all mentioned above, or just the connector for the module itself?

Not sure yet what price would be until I find out what they are charging me. In the past I sold them for $50 shipped for the module connector kit alone. I probably can do it for less if enough ordered.



Trying to find both sides of this connector too:

[eville]

Originally Posted by samckitt

Trying to find both sides of this connector too:

Sam, I think this is what you're looking for: https://www.amazon.com/replacement-C...teway&sr=8-130
https://www.amazon.com/Replacement-C...ateway&sr=8-49

[dontlifttoshift]

Here is a dumb thing, it is seemingly impossible to purchase a Spal brushless fan by itself anywhere on the internet. It seems they used to be everywhere and they have all ghosted.

Anyone have a source?

I'm sure DeWitts will sell me one, I was just surprised when I couldn't find it at Summit, Lane, or anywhere else where they had been listed before.

Semi related, I have the GM 600 watt fan in my hand. Part number 23376530 It is absolutely a Spal unit, their name is all over it. Not sure if that is common knowledge or not.

The fan blade measures 14 1/4"

The meat of the shroud is 23" wide and 13 1/2" tall. This would work really well on a 24 x 16 core.

[jmac]

Doesn't Holley sell Spal fans?

[andrewb70]

Originally Posted by dontlifttoshift

Here is a dumb thing, it is seemingly impossible to purchase a Spal brushless fan by itself anywhere on the internet. It seems they used to be everywhere and they have all ghosted.

Anyone have a source?

I'm sure DeWitts will sell me one, I was just surprised when I couldn't find it at Summit, Lane, or anywhere else where they had been listed before.

Semi related, I have the GM 600 watt fan in my hand. Part number 23376530 It is absolutely a Spal unit, their name is all over it. Not sure if that is common knowledge or not.

The fan blade measures 14 1/4"

The meat of the shroud is 23" wide and 13 1/2" tall. This would work really well on a 24 x 16 core.

Donny,

Do you know the OEM application for that fan?

The brushless fans are easy to spot because they have the heatsink on the motors and the big, round Yazaki connector with two big wires and a small wire for the PWM signal.

Andrew