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one fan spins the other don't

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Old Apr 3, 2011 | 11:09 PM
  #1  
formula forever's Avatar
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From: chicago IL
Car: 91 formula
Engine: 350 tuned port. bolt ons
Transmission: 700r4
Axle/Gears: 3.73
one fan spins the other don't

so my 89 gta with dual fan setup is having problems. when my temp reaches 220 and my fans kick on the driver side does not spin and the passanger side is working. anyone know what i should look for? is this common?
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Old Apr 3, 2011 | 11:38 PM
  #2  
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From: Central Texas
Car: GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Aussie 9-bolt/3.27 posi
Re: one fan spins the other don't

Test the one that won't spin by hot wiring it. If it doesn't spin even then? The motor is out. Cheep fix. Buy a new fan motor at Autozon/Carquest/NAPA/which ever you shop.
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Old Apr 3, 2011 | 11:42 PM
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90 camaro cj's Avatar
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From: Gilbert, AZ
Car: 1990 camaro RS
Engine: 305 TBI
Transmission: 700r4
Axle/Gears: 2.73
Re: one fan spins the other don't

isnt one fan for the AC when its on and one for when the car gets hot?
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Old Apr 3, 2011 | 11:44 PM
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From: Central Texas
Car: GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Aussie 9-bolt/3.27 posi
Re: one fan spins the other don't

Sorta.

One is for the AC, regardless of engine temp. But IIRC, both can be turned on by the ECM, regardless of AC or not.
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Old Apr 3, 2011 | 11:57 PM
  #5  
90 camaro cj's Avatar
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From: Gilbert, AZ
Car: 1990 camaro RS
Engine: 305 TBI
Transmission: 700r4
Axle/Gears: 2.73
Re: one fan spins the other don't

ahh ok i only have a single fan on my RS so i wasnt sure, but i figured id throw it out there
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Old Apr 4, 2011 | 12:06 AM
  #6  
formula forever's Avatar
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From: chicago IL
Car: 91 formula
Engine: 350 tuned port. bolt ons
Transmission: 700r4
Axle/Gears: 3.73
Re: one fan spins the other don't

Originally Posted by BlackenedBird
Test the one that won't spin by hot wiring it. If it doesn't spin even then? The motor is out. Cheep fix. Buy a new fan motor at Autozon/Carquest/NAPA/which ever you shop.
how should i go about hotwiring? can you please explain. thanks.
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Old Apr 4, 2011 | 02:58 PM
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From: Central California
Car: 92 Camaro RS
Engine: LO3
Transmission: T5
Axle/Gears: stock
Re: one fan spins the other don't

Normally the driver side goes on first, connected to power by the computer. The other one is either operated by the fan switch or the AC. Maybe the plugs are switched? What happens while the car is running when you turn on the AC?
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Old Apr 4, 2011 | 05:33 PM
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From: Central California
Car: 92 Camaro RS
Engine: LO3
Transmission: T5
Axle/Gears: stock
Re: one fan spins the other don't

To check fan, remove the connecting plug and note which side has the solid black wire going to it and which has the black with red or pink stripe going to it. Hook the pin the black one went to to ground and the other to 12 volts like off the battery with a jumper wire. Now it either works or not, but try turning on the AC first
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