E fan PCM outs
Mar 5, 2005 | 08:44 PM
#1
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From: Chatsworth, CA
E fan PCM outs
I am installing the fans tonight, and I know the blue plug uses PIN# 42....but there is a pin on the red plug that will control the low speed side of the fans.....anyone know what pin it is?
Mar 5, 2005 | 08:49 PM
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Originally Posted by BlownChevy
I am installing the fans tonight, and I know the blue plug uses PIN# 42....but there is a pin on the red plug that will control the low speed side of the fans.....anyone know what pin it is?
Mar 5, 2005 | 08:52 PM
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From: Chatsworth, CA
Originally Posted by XLR8NSS
This is the first time I've heard that. I thought the second fan control pin was used for something else on the trucks?
I was reading about it at work in the GM book, and I forgot the book
Mar 5, 2005 | 09:03 PM
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Originally Posted by BlownChevy
I was reading about it at work in the GM book, and I forgot the book
Pin 42(BLU connector) on the Fbody is the Fan relay 1 control
Pin 33(RED connector) on the Fbody is the Fan 2 and 3 relay control
Pin 42(BLU connector) on the trucks is listed as not used. We use it though to control the fans just like the Fbody does.
Pin 33(RED connector) on the trucks is the HVAC recirculation door control
Mar 5, 2005 | 09:06 PM
#5
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From: Chatsworth, CA
Originally Posted by XLR8NSS
I have a Fbody and Truck PCM pinout in front of me right now.
Pin 42(BLU connector) on the Fbody is the Fan relay 1 control
Pin 33(RED connector) on the Fbody is the Fan 2 and 3 relay control
Pin 42(BLU connector) on the trucks is listed as not used. We use it though to control the fans just like the Fbody does.
Pin 33(RED connector) on the trucks is the HVAC recirculation door control
Pin 42(BLU connector) on the Fbody is the Fan relay 1 control
Pin 33(RED connector) on the Fbody is the Fan 2 and 3 relay control
Pin 42(BLU connector) on the trucks is listed as not used. We use it though to control the fans just like the Fbody does.
Pin 33(RED connector) on the trucks is the HVAC recirculation door control
Mar 5, 2005 | 09:14 PM
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Originally Posted by BlownChevy
There you have it.....I will let you know what happens.
There a bunch of "not used" pins on the truck connectors. Which one might control a second fan setting I don't know.
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Mar 5, 2005 | 09:15 PM
#8
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From: Chatsworth, CA
Originally Posted by XLR8NSS
What Harness are you using or is it a homemade one?
There a bunch of "not used" pins on the truck connectors. Which one might control a second fan setting I don't know.
There a bunch of "not used" pins on the truck connectors. Which one might control a second fan setting I don't know.
I have my own PCM pins.....making the harness myself....not using the crappy controller that comes with the flex-a-lites.
Mar 5, 2005 | 09:17 PM
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From: Deep in the seedy underworld of Koonerville
Originally Posted by BlownChevy
From what I have read/seen it is the pin 33