V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

Fan switch

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Old Jan 30, 2009 | 05:25 PM
  #1  
tchernobog's Avatar
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Joined: Sep 2007
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From: Charlotte/Wilmington, NC
Car: 1991 Z/28 1LE
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.42
Fan switch

Alright, so my radiator fan refuses to turn on. It's not my thermostat or coolant temp sensor, as those were both replaced, so next on my list is the fan switch.

From my understanding, it's on the engine block, near the exhaust manifold, passenger side. Is that correct? What's the best way to get to it? above the car, or underneath it?

And finally, why in gods name was it a good idea to make it such a pain to get to?
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Old Jan 30, 2009 | 08:40 PM
  #2  
Maverick H1L's Avatar
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From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: Fan switch

Rear pass side corner of the engine, right next to the lifting eye. Yes, it is a real pain to get to, I've replaced one before. The reason it's there is because both heads are the same casting and the same hole on the other head is used for the temp gauge sender/idiot light switch, right behind the power steering pump.

Also, there is a way you can test the fan system. If you have A/C, you can disconnect the switch that is in the line running down the passenger's side frame rail near the coolant bottle. If you turn the ignition on and the fan comes on, you might want to look at that fan switch (not the pressure switch you just disconnected for the test). If not, I'd check your fan motor ground and the motor itself. Or, you can just ground the connector coming off of the switch (by the way, squeeze and pull, don't just yank).
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Old Jan 30, 2009 | 08:50 PM
  #3  
tchernobog's Avatar
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Joined: Sep 2007
Posts: 253
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From: Charlotte/Wilmington, NC
Car: 1991 Z/28 1LE
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.42
Re: Fan switch

I have AC, but it's not connected (compressor is dead) Can I still test it that way, despite my AC not being hooked up?
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Old Jan 31, 2009 | 11:28 AM
  #4  
Maverick H1L's Avatar
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From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: Fan switch

Yes. Until I knew what that pressure switch did, my fan ran all the time when I nixed my A/C system.
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Old Feb 24, 2009 | 10:18 AM
  #5  
hachiroku_rs's Avatar
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Joined: Jan 2007
Posts: 31
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From: coral springs, fl.
Car: 92 Camaro RS
Engine: 3.1L V6
Transmission: 700R4
Axle/Gears: 3.23
Re: Fan switch

can you post a picture of the switch cause im having a good time locating it or finding a picture of it on the net, or my hanes manuel.
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Old Feb 24, 2009 | 11:30 AM
  #6  
RBob's Avatar
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: Fan switch

Originally Posted by hachiroku_rs
can you post a picture of the switch cause im having a good time locating it or finding a picture of it on the net, or my hanes manuel.
'92's don't have a fan temperature switch. It is ECM controlled from the CTS & A/C pressure switch. IIRC, the A/C pressure switch is on the pressure line, under hood, passenger side of vehicle.

RBob.
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