adding an on/off toggle switch for cooling fan? - Chevy Impala SS Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 26 (permalink) Old 03-16-2015, 09:08 PM Thread Starter
Senior Member
 
95DoubleBubble's Avatar
 
Join Date: Jul 2011
Location: brooklyn, MD
Posts: 677
 
adding an on/off toggle switch for cooling fan?

Has anyone ever done this? I use my 95 caprice for work, making deliveries so I am constantly sitting at traffic signals or idling outside of delivery locations. I don't like the high temp setting that these cars come programmed before the fan kicks in, I have heard of having the computer reflashed but this is my only car and I can have it down more then a day. I'm looking for any insight on how I can wire in a toggle switch so I can flip the fan on when in traffic or when at the delivery. I appreciate any help that can be offered.
Phil

Big Phil, certified lowrider-aholic

http://s55.photobucket.com/albums/g134/lowriderphil/
95DoubleBubble is offline  
Sponsored Links
Advertisement
 
post #2 of 26 (permalink) Old 03-16-2015, 10:17 PM
Senior Member
 
1slow96's Avatar
 
Join Date: Jun 2011
Location: Dayton , Ohio
Posts: 6,725
 
Garage
adding an on/off toggle switch for cooling fan?

There's a bunch of ways to accomplish this with one,or both fans. Manually grounding the fan(s) relay will cause the fan(s) to come on. The schematic of the underhood fuse center might be helpful,though one should be able to identify the circuit(s) without one...

Winner 2001 Road Course (prep. class) Detroit,MI
Winner 2006 Drag race (SS class) Indianapolis,IN
Quickest event reaction time .013sec. (final-round)
Class Winner 2014 Charlotte,NC. 2016 NOLA car shows
Winner 2019 Road Course (prep.class) Pittsbugh,PA
1slow96 is offline  
post #3 of 26 (permalink) Old 03-16-2015, 11:41 PM
Senior Member
 
Join Date: Jul 2005
Location: Los Angeles
Posts: 3,506
 
Re-flash your PCM for lower temps. There is no need to have your car "down" or to send your PCM anywhere. It's OBD 1. Forget the switch idea.

Jim B.

'95 9c1, pcmperformance.com 93 tune, Dynomax Ultraflo catback, K & N box filter, LT4 KM, 160 stat, 3.08 Posi.
fbi9c1 is offline  
 
post #4 of 26 (permalink) Old 03-16-2015, 11:43 PM Thread Starter
Senior Member
 
95DoubleBubble's Avatar
 
Join Date: Jul 2011
Location: brooklyn, MD
Posts: 677
 
Quote:
Originally Posted by fbi9c1 View Post
Re-flash your PCM for lower temps. There is no need to have your car "down" or to send your PCM anywhere. It's OBD 1. Forget the switch idea.
how do i reflash it? I was under the impression it had to be sent out to a specialty company

Big Phil, certified lowrider-aholic

http://s55.photobucket.com/albums/g134/lowriderphil/
95DoubleBubble is offline  
post #5 of 26 (permalink) Old 03-17-2015, 12:43 PM
Senior Member
 
Bugman's Avatar
 
Join Date: Nov 2004
Location: Evansville, WI
Posts: 3,642
 
The problem with a switch is that you will eventually forget to turn it off. If your AC system is in working order, the fans should kick on when you turn on the AC.

Disclaimer: Any hokey-assness on my personal vehicles does not reflect the quality of my work done while I'm on the clock
Bugman is offline  
post #6 of 26 (permalink) Old 03-17-2015, 02:34 PM
Member
 
2 Sweet's Avatar
 
Join Date: Sep 2014
Location: Hilliard, OH
Posts: 37
 
Quote:
Originally Posted by Bugman View Post
The problem with a switch is that you will eventually forget to turn it off.
Are there any drawbacks to this?

I've let people borrow my car before for hours or even days at a time, and I just leave the switch on before they take possession. Easier then telling people to watch the temp gauge and hoping they remember. It's been rigged with a manual switch for over 10 years and never an issue. I would rather have it run cool than worry about letting it overheat

DGGM 1995 Chevrolet Caprice 9C1 LT1

Last edited by 2 Sweet; 03-17-2015 at 03:06 PM.
2 Sweet is offline  
post #7 of 26 (permalink) Old 03-17-2015, 02:51 PM
Senior Member
 
1slow96's Avatar
 
Join Date: Jun 2011
Location: Dayton , Ohio
Posts: 6,725
 
Garage
adding an on/off toggle switch for cooling fan?

Aside from wearing out the fans really quick? Just because they still spin,doesn't mean they're still moving the amount of air they're supposed to. Generally,it's a bad idea to run the fans all the time (unless it's an emergency),but loaning out one's car to others is an even worse idea in my experience. The load the fans place on the electrical system when running constantly is substantial,and likely to overheat wiring,connectors,relays,etc,etc...

Winner 2001 Road Course (prep. class) Detroit,MI
Winner 2006 Drag race (SS class) Indianapolis,IN
Quickest event reaction time .013sec. (final-round)
Class Winner 2014 Charlotte,NC. 2016 NOLA car shows
Winner 2019 Road Course (prep.class) Pittsbugh,PA
1slow96 is offline  
post #8 of 26 (permalink) Old 03-17-2015, 03:31 PM
Member
 
2 Sweet's Avatar
 
Join Date: Sep 2014
Location: Hilliard, OH
Posts: 37
 
Quote:
Originally Posted by 1slow96 View Post
Aside from wearing out the fans really quick? Just because they still spin,doesn't mean they're still moving the amount of air they're supposed to. Generally,it's a bad idea to run the fans all the time (unless it's an emergency),but loaning out one's car to others is an even worse idea in my experience. The load the fans place on the electrical system when running constantly is substantial,and likely to overheat wiring,connectors,relays,etc,etc...
Valid points. I still wouldn't worry about it. Like I said, I've never had a problem. Maybe I'm just lucky? I think as long as you pay attention to your gauges you won't forget to turn it on/off. That being said, a reflash is the best option simply for peace of mind, if nothing else.

DGGM 1995 Chevrolet Caprice 9C1 LT1
2 Sweet is offline  
post #9 of 26 (permalink) Old 03-18-2015, 01:22 PM Thread Starter
Senior Member
 
95DoubleBubble's Avatar
 
Join Date: Jul 2011
Location: brooklyn, MD
Posts: 677
 
So how do I go about reprograming?

Big Phil, certified lowrider-aholic

http://s55.photobucket.com/albums/g134/lowriderphil/
95DoubleBubble is offline  
post #10 of 26 (permalink) Old 03-18-2015, 01:29 PM
350
Senior Member
 
350's Avatar
 
Join Date: Aug 2005
Location: Willow Grove, PA
Posts: 6,949
 
Send a message via AIM to 350
My car has a switch, no clue how it's wired though because it was there when I bought the car. It doesn't override the PCM, it just allows you to turn the fans on manually at any time, ie staging lanes for drag racing. Still a good idea to have the PCM retuned for fans and a bunch of other things. Pick your mail order tune of choice or maybe hit up Nab (Blue Wail) if you're near him in MD.


95 DGGM SS. Cam and headers, boring stuff, classic tags, garaged
15 Durango R/T AWD, Fiat with a Hemi and 8 gears
15 Charger SXT AWD
350 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy Impala SS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome