cooling fan mod?
TECH Addict
Joined: Dec 2001
Posts: 2,340
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From: Fort Worth,TX
Re: cooling fan mod? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 01ws6ramair:
<strong>i just did it and only one fan comes on i have 3 fans is that right? 2001 ta.thanks! <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">You have 2 fans to my knowledge and whatever you did change it back and see if it turns them both on.
<strong>i just did it and only one fan comes on i have 3 fans is that right? 2001 ta.thanks! <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">You have 2 fans to my knowledge and whatever you did change it back and see if it turns them both on.
Launching!
Joined: Nov 2001
Posts: 246
Likes: 0
From: Plano, TX
Re: cooling fan mod? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 01ws6ramair:
<strong>i just did it and only one fan comes on i have 3 fans is that right? 2001 ta.thanks! <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">As Alonzo said, there are only 2 fans. There are however 3 fan relays used to turn on the fans. These 3 relays are controlled by 2 wires from the PCM. Without any sort of switch installed, the PCM will ground one wire (don't remember the color, but could look it up) This runs both fans in series (low speed). The PCM will ground both wires to run both fans on high speed (fans are run in parallel). The PCM never grounds the second wire without the first. Doing so will run 1 fan on high if I remember right.
I don't know if you bought a kit or just bought parts from Radio Shack. I have a 3 way toggle switch I bought as Radio shack. I wired mine up (after studying the Helms manual circuit) so that if push the switch left, the fans run on low, if I push the switch right, the fans run on high, if I leave it in the middle, the PCM controls everything like normal.
If you bought a kit, double check the instructions and make sure you have connected everthing to the right colored wire.
If it is a home built one, I could provide more help if I knew your exact setup: 2-way or 3-way toggle switch? are you trying to manually run both fans on low, high, or both?
Good luck, email me if you need more help.
<strong>i just did it and only one fan comes on i have 3 fans is that right? 2001 ta.thanks! <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">As Alonzo said, there are only 2 fans. There are however 3 fan relays used to turn on the fans. These 3 relays are controlled by 2 wires from the PCM. Without any sort of switch installed, the PCM will ground one wire (don't remember the color, but could look it up) This runs both fans in series (low speed). The PCM will ground both wires to run both fans on high speed (fans are run in parallel). The PCM never grounds the second wire without the first. Doing so will run 1 fan on high if I remember right.
I don't know if you bought a kit or just bought parts from Radio Shack. I have a 3 way toggle switch I bought as Radio shack. I wired mine up (after studying the Helms manual circuit) so that if push the switch left, the fans run on low, if I push the switch right, the fans run on high, if I leave it in the middle, the PCM controls everything like normal.
If you bought a kit, double check the instructions and make sure you have connected everthing to the right colored wire.
If it is a home built one, I could provide more help if I knew your exact setup: 2-way or 3-way toggle switch? are you trying to manually run both fans on low, high, or both?
Good luck, email me if you need more help.
TECH Enthusiast
Joined: Nov 2001
Posts: 712
Likes: 1
From: Dallas,Texas
Re: cooling fan mod? 2001 I took pin 42 from blue connector
ref:http://www.ls1info.com/article.php?sid=80
tapped into wire and put it though a switch to
ground.. works great for low speed fans..
here is another method of doing it.
http://www.ls1info.com/article.php?sid=171
ref:http://www.ls1info.com/article.php?sid=80
tapped into wire and put it though a switch to
ground.. works great for low speed fans..
here is another method of doing it.
http://www.ls1info.com/article.php?sid=171
Teching In
Joined: Dec 2001
Posts: 10
Likes: 0
From: Montgomery, Alabama
Re: cooling fan mod? I would really like to find a thermostatic switch to do this mod. Anyone know where one could be bought that would be appropriate for a 160 thermostat? By running the ground circuit for the relays through this switch the fans could be turned on automatically without the expense of a pcm flash. By tying the toggle switch mentioned by Red2000SS to the ground connection of the thermostat we could have 3 modes of operation based on a minimum temperature.
