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E-fan settings

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Old 07-19-2008 | 11:24 AM
  #11  
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From: bridgwater, nj
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Originally Posted by v8
what temp is your thermostat??

if its 160 then you will set the low to come on at 185 and off at 175, high to come on at 190 and off at 183

your truck should run going down the highway at 178-180 temps if you have the 160 themo

you can mess with it as you want to get the best results, good luck.
i have the stock thermostat - don't know what that is?

took my truck to work for the past 2 weeks and usually runs right around 195. gets to 210 then the lows come on. doesn't overheat in 95+ degrees so I think its working pretty good
Old 07-19-2008 | 12:31 PM
  #12  
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I have a gauge for that
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From: Huntsville, AL
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Stock thermostat is 195

here is the diagram I used to make my harness, it is exactly like the factory harness:



I believe the 99-02 PCMs can only control the on/off setting, you need a 03-07 pcm that has outputs for both low and high. Unless you wired it into the ac to go high then, in which case that would work fine.
Old 07-19-2008 | 02:27 PM
  #13  
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From: San Diego, CA
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Originally Posted by Atomic

I believe the 99-02 PCMs can only control the on/off setting, you need a 03-07 pcm that has outputs for both low and high. Unless you wired it into the ac to go high then, in which case that would work fine.

99-02 can control both. They just have a wire for auto recirculation connected to pin 33 from the factory. Remove that wire, reconfigure the tune to have pin 33 control fans instead of auto recirc.
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