E-Fan problem (PCM pin related)

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Jun 24, 2008 | 12:48 PM

#21

jknox

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From: Chapmansboro, TN

Quote:

Originally Posted by xlcooplx

My A/C is cold as well. 03+ trucks do not use PIN33 as their A/C autorecirculate is already built into the HVAC module itself.

Plus dual fan support is already in the ecm - just plug in the wires, set the temps and go.

Jun 12, 2010 | 11:09 PM

#22

chevyridinhigh22

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From: Temple, Tx

Quote:

Originally Posted by s3gulit

so wire-33 is reciculation...not needed IMO. I asked a couple of guys and they said they just pulled the old pin out and put the new pin for the fans in....i've gotta call zippy and double check that he turned 33 tom. since i don't wanna bother him on a weekend.

After a **** load of searching I found someone else that had a wire in red pin 33... What exactly am I gonna lose with this green wire out? Will my truck not be able to recirculate air anymore???

Jun 12, 2010 | 11:37 PM

#23

dlt76028

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From: Crowley, TX

Quote:

Originally Posted by chevyridinhigh22

After a **** load of searching I found someone else that had a wire in red pin 33... What exactly am I gonna lose with this green wire out? Will my truck not be able to recirculate air anymore???

It's not a big deal, you turn off the auto recirculate in the tune, and switch it to control #2 fan.