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Dual Fans

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Old Jul 12, 2012 | 12:14 AM
  #1  
DiabloWS6's Avatar
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From: San Fernando valley-Lancaster,CA
Car: '86 TRANS-AM WS6
Engine: 1989 355 TPI L98
Transmission: TH700R-4
Axle/Gears: BorgWarner 9 bolt/ 3.27
Dual Fans

I'm having a problem with the dual fans not turning on the fuse was blown the one next to the battery now when I start the car the primary fan turns for a couple seconds then turns off the car will reach almost to overheating and none of the both fans turns on after I turn it off I think I hear the fan relay tick but not sure I tried some steps I read on other threads but I may be overlooking the problem open to suggestions
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Old Jul 16, 2012 | 01:57 PM
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DiabloWS6's Avatar
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From: San Fernando valley-Lancaster,CA
Car: '86 TRANS-AM WS6
Engine: 1989 355 TPI L98
Transmission: TH700R-4
Axle/Gears: BorgWarner 9 bolt/ 3.27
Re: Dual Fans

i been reading other post similar to the problem im having with the fans not turning on and could possibly be the fan relay by the firewall on the the driver side
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Old Jul 17, 2012 | 08:32 PM
  #3  
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From: Desert
Car: 1991 Z28 Vert
Engine: 383 single plane efi
Transmission: T-56
Axle/Gears: 8.8 with 3.73s
Re: Dual Fans

Originally Posted by DiabloWS6
i been reading other post similar to the problem im having with the fans not turning on and could possibly be the fan relay by the firewall on the the driver side
If you can, run the fan(s) with the relay disconnected and jumper the power terminals(use a 10 gauge wire) If the fans turn on and stay on it is either a relay or the ground switch/wire. If the fan runs but the wires get really hot it could be a fan motor going bad.

Last edited by Tibo; Jul 17, 2012 at 08:37 PM.
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Old Jul 17, 2012 | 11:38 PM
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DiabloWS6's Avatar
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From: San Fernando valley-Lancaster,CA
Car: '86 TRANS-AM WS6
Engine: 1989 355 TPI L98
Transmission: TH700R-4
Axle/Gears: BorgWarner 9 bolt/ 3.27
Re: Dual Fans

I tried doing something similar except I just hooked up both fans parallel with speaker wire while everything still conected and I think it was to much power and the wire began to get hot and kinda getting melted on the positive terminal it was a bad way to hook up the wires but they both ran
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Old Jul 20, 2012 | 03:03 PM
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DiabloWS6's Avatar
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From: San Fernando valley-Lancaster,CA
Car: '86 TRANS-AM WS6
Engine: 1989 355 TPI L98
Transmission: TH700R-4
Axle/Gears: BorgWarner 9 bolt/ 3.27
Re: Dual Fans

i used a test light and with the KOEO the red/black wire on both fans dont light up the test light i also check both relay fans on the passenger side and checked if they clicked and they did also the primary fan runs for a couple of seconds when the car is started then just stops
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Old Jul 22, 2012 | 09:17 AM
  #6  
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From: Sarasota, FL
Car: 1988 GTA
Engine: 400 CI
Transmission: 700R4
Re: Dual Fans

Originally Posted by DiabloWS6
i used a test light and with the KOEO the red/black wire on both fans dont light up the test light i also check both relay fans on the passenger side and checked if they clicked and they did also the primary fan runs for a couple of seconds when the car is started then just stops
Try grounding the green/white wire from the relay directly. It is low voltage so you don't need a big wire. If the fan turns on then the relay and fan are fine, and your problem lies in the temp switch or temp switch connector or engine ground, assuming you have the same relays as me.
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