C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

manual override fan switch for c5 ?

Thread Tools
 
Search this Thread
 
Old Jul 19, 2013 | 10:52 PM
  #1  
6spdg37s's Avatar
6spdg37s
Thread Starter
Drifting
10 Year Member
 
Joined: Oct 2008
Posts: 1,793
Likes: 63
From: Staten Island/NJ NY/NJ
Default manual override fan switch for c5 ?

I know they made one for the c6 and I found one for the 93-02 camaro/firebird.

http://marylandspeed.com/slp-fancont...011-p-175.html

or if you've made one and have directions for it I am definitely interested.
Reply
Old Jul 19, 2013 | 11:28 PM
  #2  
6spdg37s's Avatar
6spdg37s
Thread Starter
Drifting
10 Year Member
 
Joined: Oct 2008
Posts: 1,793
Likes: 63
From: Staten Island/NJ NY/NJ
Default

Originally Posted by 8VETTE7
Check out this product from Forum supporting vendor:

http://www.saccitycorvette.com/COOLITv2.html

I have one installed in my C5 and it is absolutely great.
I saw that IM not crazy that it is a remote control I would prefer having a hardwired switch and mounting it in the ash-tray or something but I guess if that is one of the only options I will seriously consider it...

I just want it for when I am at the track in the staging lanes
Reply
Old Jul 20, 2013 | 07:22 AM
  #3  
dcandel's Avatar
dcandel
Pro
20 Year Member
Liked
Loved
 
Joined: Jan 2005
Posts: 705
Likes: 6
From: Endicott New York
Oldtimer
Default

Originally Posted by 6spdg37s
I saw that IM not crazy that it is a remote control I would prefer having a hardwired switch and mounting it in the ash-tray or something but I guess if that is one of the only options I will seriously consider it...

I just want it for when I am at the track in the staging lanes
This product works great and the installation is simple and fast (it only takes a few minutes). As far as the remote (it comes with 2 fob's) just do what I did, attach a piece of Velcro to the back of the remote and attach it to your dash board. The other remote is a spare and I keep it in the glove compartment.
Reply
Old Jul 20, 2013 | 11:41 AM
  #4  
dadaroo's Avatar
dadaroo
Le Mans Master
 
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Default

If you want to do this modification I would listen to 8VETTE7 (Chuck). He is the Forum guru on the C5 fans and operation design, not to mention many other aspects of the car.

Mr. Sam has spoken.
Reply
Old Jul 20, 2013 | 12:30 PM
  #5  
lionelhutz's Avatar
lionelhutz
Race Director
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2007
Posts: 11,152
Likes: 890
From: South Western Ontario
Default

A double pole, single throw toggle switch will allow high speed fans to be selected. Hook to the DK GRN and DK BLU wires from the PCM and use one pole for each wire. Connect the other 2 terminals to ground.

You could also get fancy and use a double pole, double throw toggle switch. The middle would be off, one direction low and the other direction high. Ground the middle terminals. Hook the low wire to both outside terminals of one pole and hook the high wire to one outside terminal.
Reply
Old Jul 20, 2013 | 12:31 PM
  #6  
lionelhutz's Avatar
lionelhutz
Race Director
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2007
Posts: 11,152
Likes: 890
From: South Western Ontario
Default

A double pole, single throw toggle switch will allow high speed fans to be selected. Hook to the DK GRN and DK BLU wires from the PCM and use one pole for each wire. Connect the other 2 terminals to ground.

You could also get fancy and use a double pole, double throw toggle switch. The middle would be off, one direction low and the other direction high. Ground the middle terminals. Hook the low wire to both outside terminals of one pole and hook the high wire to one outside terminal of the other pole.
Reply
Old Jul 20, 2013 | 12:37 PM
  #7  
_zebra's Avatar
_zebra
Le Mans Master
10 Year Member
Veteran: Air Force
 
Joined: Oct 2010
Posts: 7,373
Likes: 1,128
From: cold & windy
Default

and if you want to really be simple (though it don't look quite as pretty at the fuse box), you can just insert a jumper wire on the fan relay in the under-hood fuse box. install a switch in the jumper & route it to the cabin.

i just used a piece of speaker wire & put the toggle switch in the center console.
Reply
Old Jul 20, 2013 | 02:05 PM
  #8  
Quicksilver Vert 01's Avatar
Quicksilver Vert 01
Tech Contributor
10 Year Member
 
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
Default

Originally Posted by lionelhutz
A double pole, single throw toggle switch will allow high speed fans to be selected. Hook to the DK GRN and DK BLU wires from the PCM and use one pole for each wire. Connect the other 2 terminals to ground.

You could also get fancy and use a double pole, double throw toggle switch. The middle would be off, one direction low and the other direction high. Ground the middle terminals. Hook the low wire to both outside terminals of one pole and hook the high wire to one outside terminal.
Perfect! Total cost is less than ten dollars.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old Jul 20, 2013 | 05:02 PM
  #9  
6spdg37s's Avatar
6spdg37s
Thread Starter
Drifting
10 Year Member
 
Joined: Oct 2008
Posts: 1,793
Likes: 63
From: Staten Island/NJ NY/NJ
Default

great info thanks guys !
Reply
Old Jul 21, 2013 | 01:00 PM
  #10  
6spdg37s's Avatar
6spdg37s
Thread Starter
Drifting
10 Year Member
 
Joined: Oct 2008
Posts: 1,793
Likes: 63
From: Staten Island/NJ NY/NJ
Default

Originally Posted by lionelhutz
A double pole, single throw toggle switch will allow high speed fans to be selected. Hook to the DK GRN and DK BLU wires from the PCM and use one pole for each wire. Connect the other 2 terminals to ground.

You could also get fancy and use a double pole, double throw toggle switch. The middle would be off, one direction low and the other direction high. Ground the middle terminals. Hook the low wire to both outside terminals of one pole and hook the high wire to one outside terminal.
Originally Posted by lionelhutz
A double pole, single throw toggle switch will allow high speed fans to be selected. Hook to the DK GRN and DK BLU wires from the PCM and use one pole for each wire. Connect the other 2 terminals to ground.

You could also get fancy and use a double pole, double throw toggle switch. The middle would be off, one direction low and the other direction high. Ground the middle terminals. Hook the low wire to both outside terminals of one pole and hook the high wire to one outside terminal of the other pole.

where am I grabbing the PCM wires from ??
Reply
Old Jul 21, 2013 | 01:12 PM
  #11  
Z0_RICK's Avatar
Z0_RICK
Heel & Toe
 
Joined: Jul 2010
Posts: 23
Likes: 0
Default

This all looks like really good info.

If my car heats up a little more than 240 when it is 110 out should not the fans kick on automatically to bring the heat down ? It will run at 207 on the freeway and around town but it hates to idle for long periods.

Would this switch mod help me out in my situation ?
Reply
Old Jul 21, 2013 | 05:09 PM
  #12  
Quicksilver Vert 01's Avatar
Quicksilver Vert 01
Tech Contributor
10 Year Member
 
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
Default

Originally Posted by 6spdg37s
where am I grabbing the PCM wires from ??
They can be accessed at fan control relay sockets.
Reply
Old Jul 21, 2013 | 06:19 PM
  #13  
lionelhutz's Avatar
lionelhutz
Race Director
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2007
Posts: 11,152
Likes: 890
From: South Western Ontario
Default

Originally Posted by 6spdg37s
where am I grabbing the PCM wires from ??
Those wires will run from the under hood fuse box to the PCM which is under the battery. You'd have to find them at one end or track the harness and open it up to get to them somewhere in the middle. Others have posted you can unbolt and turn the fuse box over to access the wiring under it.
Reply
Old Aug 27, 2013 | 01:20 PM
  #14  
jrprich's Avatar
jrprich
Le Mans Master
15 Year Member
 
Joined: May 2006
Posts: 5,747
Likes: 224
From: Hillsboro Oregon
Default

Originally Posted by lionelhutz
A double pole, single throw toggle switch will allow high speed fans to be selected. Hook to the DK GRN and DK BLU wires from the PCM and use one pole for each wire. Connect the other 2 terminals to ground.

You could also get fancy and use a double pole, double throw toggle switch. The middle would be off, one direction low and the other direction high. Ground the middle terminals. Hook the low wire to both outside terminals of one pole and hook the high wire to one outside terminal.
With either mod, would the system operate normally when the toggle switches were in the OFF position or does the install of a overide switch defeat the PCM fan controls?
Reply
Old Aug 27, 2013 | 01:38 PM
  #15  
jfernandez98's Avatar
jfernandez98
Pro
Supporting Member
15 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Apr 2011
Posts: 629
Likes: 20
From: Cinnamison NJ
Default SacCity

I have the remote controlled one on my Vette. I know that Saccity also makes a race version where you can run the fans with the car off for drags or autocross. They were also just asking if there might be a market for a hard wired switch. I had replied that I love mine but that if they were to market a hard wired switch I would also like a light to tell me when the high fans are running. They replied that the best thing would be to contact them and they would be able to set me up. I would give them a call it can't hurt to see what they have to say. I'll also add that it was the easiest part that I have installed to date and was well designed.
Reply
Old Aug 27, 2013 | 01:47 PM
  #16  
jrprich's Avatar
jrprich
Le Mans Master
15 Year Member
 
Joined: May 2006
Posts: 5,747
Likes: 224
From: Hillsboro Oregon
Default

Originally Posted by 8VETTE7
Should be easy to do.

Here is a schematic of the fans:



You simply need to ground connection point E2 on the diagram to turn the fans on in low speed mode or provide power from G2 to E3. I recall seeing a writeup years ago where they removed relay and used a paper clip in the socket for relay 45.
When looking at relay 45 in the fuse box, is E2 in the lower left corner of the relay? (lower being closest to the battery and firewall )
Reply
Old Aug 28, 2013 | 09:26 PM
  #17  
_zebra's Avatar
_zebra
Le Mans Master
10 Year Member
Veteran: Air Force
 
Joined: Oct 2010
Posts: 7,373
Likes: 1,128
From: cold & windy
Default

Originally Posted by jrprich
With either mod, would the system operate normally when the toggle switches were in the OFF position or does the install of a overide switch defeat the PCM fan controls?
if you do it the way i did, everything works like factory with the switch off & the fans run on high with the switch on. cost me all of $5, don't require any tapping/splicing of wires, and the only irreversible thing was drilling a hole in the console to hard-mount my switch because i wanted it inside the car instead of under the hood.
Reply

Get notified of new replies

To manual override fan switch for c5 ?

Old Sep 22, 2013 | 04:23 PM
  #18  
6spdg37s's Avatar
6spdg37s
Thread Starter
Drifting
10 Year Member
 
Joined: Oct 2008
Posts: 1,793
Likes: 63
From: Staten Island/NJ NY/NJ
Default

Originally Posted by lionelhutz
A double pole, single throw toggle switch will allow high speed fans to be selected. Hook to the DK GRN and DK BLU wires from the PCM and use one pole for each wire. Connect the other 2 terminals to ground.

You could also get fancy and use a double pole, double throw toggle switch. The middle would be off, one direction low and the other direction high. Ground the middle terminals. Hook the low wire to both outside terminals of one pole and hook the high wire to one outside terminal.
I want to do a duble pole double throw and have middle as off and one way low and one way on...

am I grabbing from relay 43 as well?

I definitely would like a little more info so I can work this out when I have some free time.

Originally Posted by 8VETTE7
Should be easy to do.

Here is a schematic of the fans:



You simply need to ground connection point E2 on the diagram to turn the fans on in low speed mode or provide power from G2 to E3. I recall seeing a writeup years ago where they removed relay and used a paper clip in the socket for relay 45.
I really appreciate any help also I jumped relay 45 as instructed in the ranger website and it ended up throwing a check engine code for fan control module 1 .

Hence why I would like to have something permanently hardwired/securely in place. thanks !
Reply
Old Sep 23, 2013 | 02:53 AM
  #19  
_zebra's Avatar
_zebra
Le Mans Master
10 Year Member
Veteran: Air Force
 
Joined: Oct 2010
Posts: 7,373
Likes: 1,128
From: cold & windy
Default

i know that sounds cool on paper, but what's the practicality of going through a bunch of extra work simply to run the fan on low? does it really benefit you in some way?
Reply
Old Sep 23, 2013 | 06:46 PM
  #20  
6spdg37s's Avatar
6spdg37s
Thread Starter
Drifting
10 Year Member
 
Joined: Oct 2008
Posts: 1,793
Likes: 63
From: Staten Island/NJ NY/NJ
Default

Originally Posted by _zebra
i know that sounds cool on paper, but what's the practicality of going through a bunch of extra work simply to run the fan on low? does it really benefit you in some way?
realistically it could only run on high and it wouldnt matter to me...

having it controlled by a switch in the cockpit, very practical for when I race at e-town (often) pre-staging the car culd be ice cold and by the time u get to the line you are at 220 degrees.
Reply



All times are GMT -4. The time now is 06:36 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 11:09:53


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE