Firebird Nation: fans not working - Firebird Nation

Jump to content

FirebirdNation.com is the premier Pontiac Firebird forum on the internet. Supporting Members do not see the above ads.
Page 1 of 1
  • You cannot start a new topic
  • You cannot reply to this topic

fans not working Rate Topic: -----

#1 User is offline   valen 

  • Pontiac Firebird Tire Changer
  • PipPip
  • Group: Full Member
  • Posts: 52
  • Joined: 04-November 10
  • Gender:Male
  • First Name:valen
  • City:zeltser
  • State or Province:NJ
  • Country:USA
  • Year: 1995
  • Make: pontiac
  • Model: trans am formula
  • Engine: 5.7 l lt1
  • Transmission: manual

Posted 03 June 2011 - 07:54 PM

Hey everyone! My fans arent working and its causing an over heating problem! I checked the relay fuses by putting them into the fog light spot. Every time i did so the fog lights worked. They worked with fan #1 relay and with fan # 2 relay and faan #3 relay. Did i check the Relays properly or is there something else i should know?
0

#2 User is offline   GaryDoug 

  • Ramblin' Wreck
  • PipPipPipPipPipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 3,671
  • Joined: 31-May 11
  • Gender:Male
  • First Name:Gary
  • City:Florida West Coast
  • State or Province:FL
  • Country:USA
  • Interests:EE from Ga Tech, but I can't fix your TV, so don't ask ;-)
  • Year: 1998
  • Make: Pontiac
  • Model: Trans Am
  • Engine: 5.7L LS1
  • Transmission: 4L60-E Auto

Posted 03 June 2011 - 08:24 PM

Sounds right to me if you are talking about the relays. Did you check the "cooling fan" fuse too?
Posted Image
1998 Trans Am - LS1/A4 - all stock and almost all original - one owner - driven daily
0

#3 User is offline   djfirebird93 

  • Firebird Master Tech.
  • View gallery
  • Group: FBNCC Member
  • Posts: 2,745
  • Joined: 06-January 11
  • Gender:Male
  • First Name:DJ
  • City:Jefferson City
  • State or Province:MO
  • Country:USA
  • Year: 1999
  • Make: Pontiac
  • Model: Firebird
  • Engine: 3800 Series II
  • Transmission: 4L60E Automatic

Posted 03 June 2011 - 09:59 PM

Definitely start with the Cooling fan fuse. And check the connections at each fan. Test the voltage at each connector. If there's no voltage at either connector, then it's a whole other issue.
My bird is a working progress. New Marshall engine-forged pistons, upgraded rockers and stronger rods/bearings. Rebuilt transmission. New LSD. I wish money grew on trees :)
0

#4 User is offline   valen 

  • Pontiac Firebird Tire Changer
  • PipPip
  • Group: Full Member
  • Posts: 52
  • Joined: 04-November 10
  • Gender:Male
  • First Name:valen
  • City:zeltser
  • State or Province:NJ
  • Country:USA
  • Year: 1995
  • Make: pontiac
  • Model: trans am formula
  • Engine: 5.7 l lt1
  • Transmission: manual

Posted 04 June 2011 - 08:09 PM

holy hell! i couldnt find the cooling fan fuse for my life. theres two fuse boxes right? where is that fuse? and what do i have to take apart to get to the connections of the fans?
0

#5 User is offline   GaryDoug 

  • Ramblin' Wreck
  • PipPipPipPipPipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 3,671
  • Joined: 31-May 11
  • Gender:Male
  • First Name:Gary
  • City:Florida West Coast
  • State or Province:FL
  • Country:USA
  • Interests:EE from Ga Tech, but I can't fix your TV, so don't ask ;-)
  • Year: 1998
  • Make: Pontiac
  • Model: Trans Am
  • Engine: 5.7L LS1
  • Transmission: 4L60-E Auto

Posted 04 June 2011 - 08:23 PM

Here's a photo of a 98. Might be similar to your car. Note the arrow pointing to the "COOL FAN" legend on the box cover. Not sure about the cables yet.


Posted Image
1998 Trans Am - LS1/A4 - all stock and almost all original - one owner - driven daily
0

#6 User is offline   Injuneer 

  • Just Trying to Help
  • View gallery
  • Group: Administrator
  • Posts: 9,863
  • Joined: 22-November 05
  • Gender:Male
  • First Name:Fred
  • City:East Brunswick
  • State or Province:NJ
  • Country:USA
  • Interests:Card carrying member - NHRA and AARP! Licensed Professional Engineer (Mechanical)
  • Year: 1994
  • Make: Pontiac
  • Model: Firebird Formula
  • Engine: 381ci LT1 stroker
  • Transmission: TH400 + O/D

Posted 05 June 2011 - 05:57 AM

The fan motors are fed by a fusible link. The fan relay control voltage is protected by fuse #6 in the underhood box (which is different than the 98 and ups). Here's the diagram for your 95 (use "late production" - the switch from the "early" to "late" design was actually made in the 94 model year, not 95, but they must have forgot to change the wiring diagram).

http://shbox.com/1/1995_pcm6.jpg

Do the fans come on when your A/C is turned on? (Assumes your A/C is charged and working). What temp are you seeing on the dash gauge when you are expecting the fans to come on? Stock programming turns the fans on low speed at 226*F, and to high speed at 235*F.

For future reference, this is the 93-97 underhood box, in the lower right hand corner:

Attached File(s)


1994 FIREBIRD FORMULA

FRED

Posted Image

381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

NO PHOTOS - MY WEBSITE IS BEING MOVED TO ANOTHER SERVER - SORRY FOR ANY INCONVENIENCE
0

#7 User is offline   djfirebird93 

  • Firebird Master Tech.
  • View gallery
  • Group: FBNCC Member
  • Posts: 2,745
  • Joined: 06-January 11
  • Gender:Male
  • First Name:DJ
  • City:Jefferson City
  • State or Province:MO
  • Country:USA
  • Year: 1999
  • Make: Pontiac
  • Model: Firebird
  • Engine: 3800 Series II
  • Transmission: 4L60E Automatic

Posted 05 June 2011 - 08:57 AM

There should be connectors somewhere on the fans to provide power. I'm honestly not sure where the exact location is on your car, i'm not too familiar with the older models.
My bird is a working progress. New Marshall engine-forged pistons, upgraded rockers and stronger rods/bearings. Rebuilt transmission. New LSD. I wish money grew on trees :)
0

#8 User is offline   Gearhead223 

  • Pontiac Firebird Newbie
  • Pip
  • Group: New Member
  • Posts: 3
  • Joined: 25-July 11
  • Gender:Male
  • First Name:Matthew
  • City:Elkridge
  • State or Province:MD
  • Country:USA
  • Year: 2000
  • Make: Pontiac
  • Model: Firebird
  • Engine: 3.8L
  • Transmission: Auto 4L60E

Posted 26 July 2011 - 05:53 PM

Hey injuneer do you have that fan circuit diagram for a 2000 3.8L?

Dj the plugs for the fans are on the bottom of the fan motors.
0

#9 User is offline   Injuneer 

  • Just Trying to Help
  • View gallery
  • Group: Administrator
  • Posts: 9,863
  • Joined: 22-November 05
  • Gender:Male
  • First Name:Fred
  • City:East Brunswick
  • State or Province:NJ
  • Country:USA
  • Interests:Card carrying member - NHRA and AARP! Licensed Professional Engineer (Mechanical)
  • Year: 1994
  • Make: Pontiac
  • Model: Firebird Formula
  • Engine: 381ci LT1 stroker
  • Transmission: TH400 + O/D

Posted 27 July 2011 - 09:25 AM

GaryDoug posted a link to the 99 shop manuals, downloadable from online. That would probably be close to your 2000. Try a "search".
1994 FIREBIRD FORMULA

FRED

Posted Image

381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

NO PHOTOS - MY WEBSITE IS BEING MOVED TO ANOTHER SERVER - SORRY FOR ANY INCONVENIENCE
0

#10 User is offline   bgonzalez95 

  • Pontiac Firebird Tire Changer
  • PipPip
  • Group: Full Member
  • Posts: 71
  • Joined: 07-August 10
  • Gender:Male
  • First Name:Byron
  • City:Riverside
  • State or Province:CA
  • Country:USA
  • Interests:Cars,and cars,and T/A
  • Year: 1995
  • Make: PONTIAC
  • Model: Trans Am
  • Engine: 5.7 Lt1
  • Transmission: 4L60E

Posted 15 August 2011 - 11:20 PM

View Postvalen, on 03 June 2011 - 07:54 PM, said:

Hey everyone! My fans arent working and its causing an over heating problem! I checked the relay fuses by putting them into the fog light spot. Every time i did so the fog lights worked. They worked with fan #1 relay and with fan # 2 relay and faan #3 relay. Did i check the Relays properly or is there something else i should know?


hey did you ever find the problem?

Attached File(s)


0

Share this topic:


Page 1 of 1
  • You cannot start a new topic
  • You cannot reply to this topic

1 User(s) are reading this topic
0 members, 1 guests, 0 anonymous users