Notices
V6 S197 General Discussion This section is for technical discussions pertaining specifically to the V6 variation of the 2005 and newer Ford Mustang.

is cooling fan "on" temp adjustable?

Old 03-22-2019, 08:34 PM
  #1  
650mark
Thread Starter
 
Join Date: Feb 2019
Location: az
Posts: 3
Default is cooling fan "on" temp adjustable?

2005 v6, automatic. all stock. is it possible to adjust the temp at which the cooling fan comes on? i'd like mine to come on sooner. if so, where can i find this procedure.
i'm in phoenix arizona and this car will need all the help it can get to make it safely through our summer temps. thanks
650mark is offline  
Old 03-23-2019, 02:07 AM
  #2  
08'MustangDude
5th Gear Member
 
Join Date: Jan 2018
Location: Pennsylvania
Posts: 2,264
Default

Tuning, it is, but not normally. My tuner has an option to change when it comes on
in increments up or down, but I can't enter a value, just turn it up or down.

Doesn't matter WHERE you are, if the coolant system is healthy, then you don't
have to worry about anything. If that were the case, then they'd sell cars in that
area with a lower on setting for the fan(s). Mine only has one fan, and I have an '08.

Also, it does not matter, the thermostat sets the bottom line as to when it opens,
so if you REALLY want to run cooler you need to sway it out for a 10 degree lower
one. With this is mine, that does not set the CEILING for the temps, you can still
climb to over 200 degrees.
08'MustangDude is offline  
Old 03-23-2019, 08:27 AM
  #3  
650mark
Thread Starter
 
Join Date: Feb 2019
Location: az
Posts: 3
Default

is it possible to install a manual switch into the fan circuit so that i can turn the fan on whenever i want to?
650mark is offline  
Old 03-23-2019, 03:24 PM
  #4  
08'MustangDude
5th Gear Member
 
Join Date: Jan 2018
Location: Pennsylvania
Posts: 2,264
Default

Originally Posted by 650mark View Post
is it possible to install a manual switch into the fan circuit so that i can turn the fan on whenever i want to?
You bet:

I made this, but never used it... Can use it for line-lock, fog lights, or another
relay to put the cooling fan on.

08'MustangDude is offline  
Old 03-24-2019, 08:26 PM
  #5  
imp
3rd Gear Member
 
imp's Avatar
 
Join Date: Jul 2017
Location: AZ
Posts: 550
Default

Originally Posted by 650mark View Post
is it possible to install a manual switch into the fan circuit so that i can turn the fan on whenever i want to?
If you install a manual switch and do not use a separate relay to turn on the fan, as 08 suggests, and turn on the stock relay, this will likely tell the PCM that the fan is failing to turn off, and throw a trouble code & CEL.
imp is offline  
Old 03-25-2019, 02:25 AM
  #6  
08'MustangDude
5th Gear Member
 
Join Date: Jan 2018
Location: Pennsylvania
Posts: 2,264
Default

You can use the switch to latch the factory relay, no problem WHAT SO EVER. The SJB won't know
that its already on when it turns the fan on. The SJB provides a ground to the coil when the ECU needs
the fan on. You're doing it manually, so it's already ON when the ECU commands it, so it will STILL sees
it as on. The COIL side is not what provides the power to the fan, the coil turns the relay on, and
voltage passes through on completely separate terminals.

The only way you cause a failure, is if you loop the factory coil supply though the switch, so that when
the switch is off, the relay won't latch because you have the switch off. NO, no, that's not how we are
doing it! You are providing a separate ground for the coil, to trigger the factory relay when you see
fit. So, when the switch is off, it will NOT interfere with the normal operation. When the switch is on,
it still won't interfere, because IF the circuit is monitored, it already being on, when the ECU commands
it on, won't make a bit of difference.


08'MustangDude is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
aode08
5.0L (1979-1995) Mustang
6
07-31-2008 06:04 PM
wolverine8490
4.6L (1996-2004 Modular) Mustang
5
06-17-2008 08:30 AM
pnicholson
2005-2014 Mustangs
0
02-28-2008 02:53 PM
9COILEDSERPENT6
SVT Forums
1
09-01-2006 03:13 AM
DILO2001GT
4.6L (1996-2004 Modular) Mustang
1
03-21-2005 09:08 PM


Thread Tools
Search this Thread
Quick Reply: is cooling fan "on" temp adjustable?


Advertising
Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.