Allen's wiring harness for GM efans

[moregrip]

What are the options for activation again? I forget.........thanks

[farmtruc]

I think you're asking what activates them, the clutch fan wire and the pcm once is grounds pin 42.

hope that helps,


allen

[moregrip]

Originally posted by farmtruc@Mar 24 2005, 09:02 PM
I think you're asking what activates them, the clutch fan wire and the pcm once is grounds pin 42.

hope that helps,


allen

what turn on configurations are there?

1 fan, 2 fans, speeds, at what times?

thanks

[moregrip]

anyone? is there only 1 harness?

[farmtruc]

Originally posted by moregrip@Mar 25 2005, 11:35 PM
anyone? is there only 1 harness?

Here you go, it works something like this:

The pcm is programmed to ground pin 42 when it reaches a turn on value and off when it reaches a turn off value. When it does ground the pin, it will activate both fans and turn them on low speed.
When the a/c is turned on, the green wire has 12volts applied; both fans will turn on high, as long as the pcm has reached its turn on value.
If the engine hasn’t reached its turn on value and the a/c is turned on, one fan will turn on high. This will keep the a/c cool.


thanks, hope that helps out,

allen

[moregrip]

Originally posted by farmtruc+Mar 25 2005, 10:41 PM--><div class='quotetop'>QUOTE(farmtruc &#064; Mar 25 2005, 10:41 PM)</div>

<!--QuoteBegin-moregrip

@Mar 25 2005, 11:35 PM
anyone? is there only 1 harness?

Here you go, it works something like this:

The pcm is programmed to ground pin 42 when it reaches a turn on value and off when it reaches a turn off value. When it does ground the pin, it will activate both fans and turn them on low speed.
When the a/c is turned on, the green wire has 12volts applied; both fans will turn on high, as long as the pcm has reached its turn on value.
If the engine hasn’t reached its turn on value and the a/c is turned on, one fan will turn on high. This will keep the a/c cool.


thanks, hope that helps out,

allen [/b]

do you program the PCM for turn on and off values (temps) or is it simply a default you turn on?

[rosscob]

The PCM has to be programmed for the turn on - off values.

[moregrip]

Originally posted by rosscob@Mar 26 2005, 08:58 AM
The PCM has to be programmed for the turn on - off values.

I&#39;ll look in my HPTuners today

[badbowtie]

Did you get it to work? I am having problems with the PCM activation myself. Let me know if you get it to work.

[kirkrhughes]

Is there a how to with pics for installing the harness around some where?