I currently have a 3-relay wiring on me e-fans-
PCM on = both fans slow - (wired in series)
AC on = 1 fan high
PCM & AC = 2 fans high

Is there a way were I can set the pcm to turn both fans on low at a certain temp and then both fans on high at a diffrent temp , like the 05 trucks have two temp setting for the fans,
Can I do this and how?
Thanks

 

What year truck are you doing this on?

 

Its is a 99 model but has an 02 PCM.

 

You can only do that type of operation with a 03+ PCM.

refer to this thread.
link

 

Thanks for the help!

 

Sure and sorry.

 

You Could buy another fan controler. That way you have two different settings for the engine...
I have mine come on both low at 170 with the aftermarket controler, then with pin 44 when the coolent gets to 195 both on high.

 

Thanks, that is will i will end up doing