Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

fan wont turn on!

Thread Tools
 
Search this Thread
 
Old Sep 27, 2009 | 05:09 PM
  #1  
1BAD_LS1's Avatar
Thread Starter
Restricted User
iTrader: (36)
 
Joined: Sep 2008
Posts: 1,268
Likes: 0
From: Alliance Nebraska
Default fan wont turn on!

Well i am finishing up my FM t70 project and started it up filing antifreeze, ect....

the temp get to 220* and the fans didn't kick on so i checked the tune and they were set to come on at 165* .....so i opened the scanner and checked the DTC's in the scanner. Well it brings up the relay falure for the fans!

I did cut and reverse the wires on the pigtails for both fans to run them backwards... but that shouldn't cause the problem! should it?


thanks for the help guys!


anyone have any ideas???????
Reply
Old Sep 27, 2009 | 05:36 PM
  #2  
1BAD_LS1's Avatar
Thread Starter
Restricted User
iTrader: (36)
 
Joined: Sep 2008
Posts: 1,268
Likes: 0
From: Alliance Nebraska
Default

I checked all the pins under the relay and NONE of them have power! is there another fuse somewhere??? Maybee another wire?

I did a motor swap on this project also so the harness came out....what wires whould i check?
Reply
Old Sep 27, 2009 | 05:50 PM
  #3  
Dewey's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Dec 2008
Posts: 1,356
Likes: 0
From: Huntsville, AL
Default

just a thought. try turning the a/c on, that should make the fans engage if the problem is in the tune or the thermostat. other than that i've got no clue
Reply
Old Sep 27, 2009 | 05:58 PM
  #4  
1BAD_LS1's Avatar
Thread Starter
Restricted User
iTrader: (36)
 
Joined: Sep 2008
Posts: 1,268
Likes: 0
From: Alliance Nebraska
Default

Originally Posted by honeycutt.dewey
just a thought. try turning the a/c on, that should make the fans engage if the problem is in the tune or the thermostat. other than that i've got no clue

ok ill try that.... im willing to try anything! I dont really want to wire them up to a switch.
Reply
Old Sep 27, 2009 | 06:06 PM
  #5  
Dewey's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Dec 2008
Posts: 1,356
Likes: 0
From: Huntsville, AL
Default

yeah that would not be fun. is this a dd or a track car?
Reply
Old Sep 27, 2009 | 06:12 PM
  #6  
1BAD_LS1's Avatar
Thread Starter
Restricted User
iTrader: (36)
 
Joined: Sep 2008
Posts: 1,268
Likes: 0
From: Alliance Nebraska
Default

ac trick didn't work... they worked fine befor i did the motor swap.

thermostat is opening, tune is good for fans (i have hp tuners), BUT when i check the pins for the fan relays they have no power!

All i did was swap the wires around so the fans would run backwards... everything else is working except the fans!

Anyone have a wiring harness diagram or an idea of a wire to check???
Reply
Old Sep 27, 2009 | 06:13 PM
  #7  
1BAD_LS1's Avatar
Thread Starter
Restricted User
iTrader: (36)
 
Joined: Sep 2008
Posts: 1,268
Likes: 0
From: Alliance Nebraska
Default

Originally Posted by honeycutt.dewey
yeah that would not be fun. is this a dd or a track car?
its not my DD just a weekend warrior... drive it 2-3 times a week.
Reply
Old Sep 27, 2009 | 06:34 PM
  #8  
1BAD_LS1's Avatar
Thread Starter
Restricted User
iTrader: (36)
 
Joined: Sep 2008
Posts: 1,268
Likes: 0
From: Alliance Nebraska
Default

i cut out the 02 sensors from the harness... could this cause it?
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Sep 27, 2009 | 07:40 PM
  #9  
1BAD_LS1's Avatar
Thread Starter
Restricted User
iTrader: (36)
 
Joined: Sep 2008
Posts: 1,268
Likes: 0
From: Alliance Nebraska
Default

I also removed the AC wires....

So the AC wires and O2 sensor wires were removed.... could this cause it?
Reply
Old Sep 27, 2009 | 09:24 PM
  #10  
1BAD_LS1's Avatar
Thread Starter
Restricted User
iTrader: (36)
 
Joined: Sep 2008
Posts: 1,268
Likes: 0
From: Alliance Nebraska
Default

got it guys... had a wire grounding out!
Reply




All times are GMT -5. The time now is 05:13 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE