Western Members CA, AZ, NV, UT, CO, NM, HI

Help Fans arent turning on..

Thread Tools
 
Search this Thread
 
Old Feb 16, 2008 | 01:22 PM
  #1  
eddielb's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2006
Posts: 522
Likes: 1
Default Help Fans arent turning on..

I tried to ground the blue/green wire on the PCM right on the passenger side, and the fans still dont turn on, fuse 10 on the fuse box doesnt have power it says "COOL FAN"

I don't have my mitchell program.... left it at work, any ideas? Thanks all!]

How do i test if the fans are bad? Car is overheating if im not moving.... and they arent on when the car is off... thanks
Reply
Old Feb 16, 2008 | 01:28 PM
  #2  
ae13291's Avatar
Banned
iTrader: (8)
 
Joined: Jun 2007
Posts: 3,093
Likes: 1
From: san fernando valley, california
Default

ok its 99% your relay!! check fans 1 and 2 relays! or u may have a break in the wire, or the fan motors! but its most likely the relays
Reply
Old Feb 16, 2008 | 08:12 PM
  #3  
transambandit's Avatar
TECH Fanatic
iTrader: (6)
 
Joined: May 2004
Posts: 1,892
Likes: 0
Default

wire up a fan switch, thats what i did.
Reply
Old Feb 17, 2008 | 10:42 AM
  #4  
eddielb's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2006
Posts: 522
Likes: 1
Default

Found out the 40 amp fuse was blown, only checked one side and saw 12 volts didnt check other, and the little 10 amper got voltage now, was driving around everything worked fine then all of a sudden the 40 amp fuse blew again, should i just replace the relays? Their an autozone part right? Is there anyway to check the relays w/ a meter?
Reply
Old Feb 17, 2008 | 04:39 PM
  #5  
Chevy_Man_510's Avatar
Staging Lane
iTrader: (3)
 
Joined: Nov 2007
Posts: 96
Likes: 0
From: The Bay
Default

In these situations dude just say F*** it and buy a new car... j/k... Hope u get it fixed soon cuz ur car is too damn clean to be having strange **** goin on with it... good luck dude...
Reply
Old Feb 17, 2008 | 07:33 PM
  #6  
eddielb's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2006
Posts: 522
Likes: 1
Default

Originally Posted by Chevy_Man_510
In these situations dude just say F*** it and buy a new car... j/k... Hope u get it fixed soon cuz ur car is too damn clean to be having strange **** goin on with it... good luck dude...
thanks >< i replaced the relays, and the fuse, it started working, then all of a sudden it blew th fuse again... so obviously there is a short somewhere... Now I gotta find it :-/
Reply
Old Feb 17, 2008 | 08:42 PM
  #7  
eddielb's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2006
Posts: 522
Likes: 1
Default

the 40 amp fuse cool fan keeps blowing, I replaced the relays, things seem to be good for a while then the fuse blows and car starts to overheat if im not moving,

There is no visible shorts on the green and blue wire by the passenger side fender, nor by the fuse block, I replaced the relays already... the ones I replaced the original ones with are very similar to the foglight relays in that they are not as big as the fan relay, does that matter? Could that be the problem? Code my SES is throwing is P0480 and P0481
Those codes:
P0480: Fan Relay 1 malfunction
P0481: Fan Relay 2 malfunction

THanks!

What else can I try?
Reply
Old Feb 17, 2008 | 11:12 PM
  #8  
ae13291's Avatar
Banned
iTrader: (8)
 
Joined: Jun 2007
Posts: 3,093
Likes: 1
From: san fernando valley, california
Default

have u tried grounding the green or blue wire on the passenger side to the frame?? if it still does not work! then its something to do with the relay maybe?? or it could also be a short! trace the wires down carefully!!
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

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

 Verdad Gallardo
story-4

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

 Pouria Savadkouei
story-5

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

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

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

 Verdad Gallardo
Old Feb 17, 2008 | 11:17 PM
  #9  
camarojunky74's Avatar
11 Second Club
iTrader: (14)
 
Joined: Apr 2006
Posts: 568
Likes: 0
From: corona
Default

i find most shorts occur at the back of the box, check there thoroughly first, then move to checking the wires for resistance, too much resistance means short to power or ground, easier done then explained i hope you have an idea of what im talking about, if not ill see if i can get some time and you can cruise up and ill get it done for ya
Reply
Old Feb 18, 2008 | 09:10 AM
  #10  
eddielb's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2006
Posts: 522
Likes: 1
Default

Ok here is what I found out


ok im not 100% positive but,

When I ground the blue wire by the passenger side fender the 40 amp fuse blows, fan doesn't spin.

I replace the fuse (again)
Then
When I ground the dark green wire, the driver side fan spins real fast.

DO I have ashort or is the passenger side fan dead causing 40 amp fuse to blow? How do I change it? Looks like a pain in the ***....

I don't have myt wiring diagrams, is there a way to take out fuse box in order to look at all wires ont he bottom? Which wire is the power wire to the passenger side fan?
Reply
Old Feb 18, 2008 | 09:22 AM
  #11  
orangefun's Avatar
11 Second Club
iTrader: (5)
 
Joined: Sep 2005
Posts: 752
Likes: 0
From: visalia california
Default

Sounds Like The Fan Motors Are Out. When Fans Start Going Out They Draw Lots Of Amps Causing Relays, Fuses, And Resitors To Blow...just An Idea
Reply
Old Feb 18, 2008 | 09:29 AM
  #12  
eddielb's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2006
Posts: 522
Likes: 1
Default

Originally Posted by orangefun
Sounds Like The Fan Motors Are Out. When Fans Start Going Out They Draw Lots Of Amps Causing Relays, Fuses, And Resitors To Blow...just An Idea
thats what I thought, are the passenger/driver side fans seperate? Like can I takeout just the passenger side one? THat is the one causing the short, anyone got instructions? Thanks

Once out of the car ill test it to the batter directly see if it spins
Reply
Old Feb 18, 2008 | 09:31 AM
  #13  
orangefun's Avatar
11 Second Club
iTrader: (5)
 
Joined: Sep 2005
Posts: 752
Likes: 0
From: visalia california
Default

Do You Have A Way To Test Draw??
Reply
Old Feb 18, 2008 | 09:44 AM
  #14  
eddielb's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2006
Posts: 522
Likes: 1
Default

i have a meter, how exactly do I test the draw?
Reply
Old Feb 18, 2008 | 10:54 AM
  #15  
camarojunky74's Avatar
11 Second Club
iTrader: (14)
 
Joined: Apr 2006
Posts: 568
Likes: 0
From: corona
Default

you have to have an amp clamp, that you hang over those wires and ground your black lead, then make the fans spin manually, it will give you an amperage reading, problem is i dont know where to find the specs for this measurement from gm
Reply
Old Feb 18, 2008 | 11:32 AM
  #16  
eddielb's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2006
Posts: 522
Likes: 1
Default

How to I take the frans out? Ill just plug them into power and see if the spin, im almost positive the passenger side fan is either out or spinning slow... is the motor easily replaced? thanks guys

I see the motor at kragen for 50 bucks, or whole fan assembly for 100 at autozone
Reply
Old Feb 18, 2008 | 11:41 AM
  #17  
camarojunky74's Avatar
11 Second Club
iTrader: (14)
 
Joined: Apr 2006
Posts: 568
Likes: 0
From: corona
Default

take the whole shroud out by lifting it up off the 4 clips on each edge from the radiator
Reply
Old Feb 18, 2008 | 02:20 PM
  #18  
eddielb's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2006
Posts: 522
Likes: 1
Default

got it out, ended up being the fan motor, went to kragen, got a universal GM fan motor 25$ later car works fine, check engine light is off, and returned the 32$ worth of relays back to autozone.... WOot
Reply
Old Feb 18, 2008 | 02:26 PM
  #19  
m6ttop's Avatar
TECH Regular
iTrader: (18)
 
Joined: Nov 2007
Posts: 469
Likes: 0
From: anaheim, ca
Default

woohooo!! I hate electrical problems
Reply
Old Feb 18, 2008 | 03:35 PM
  #20  
camarojunky74's Avatar
11 Second Club
iTrader: (14)
 
Joined: Apr 2006
Posts: 568
Likes: 0
From: corona
Default

nice good call whoever called bad motor
Reply



All times are GMT -5. The time now is 10:30 AM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
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-4
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-5
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-6
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-7
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-8
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-9
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