Fan operation?
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From: Creswell, Oregon
Fan operation? Before you scream at me, I've searched high and low and found a ton of different conflicting answers.
How are the stock fans in a 01 Z28 supposed to operate?
Currently mine has the passenger side fan comes on around 225, and shuts off at 21x. Thats all i've experienced with it. I have deleted the underhood A/C components. Today, I replaced the stock fans with 2 derale pushers using the stock fan controls to trigger the relays to the 2 fans. But still, only the passenger fan comes on at what i assume is high speed at 225ish.
How are the stock fans in a 01 Z28 supposed to operate?
Currently mine has the passenger side fan comes on around 225, and shuts off at 21x. Thats all i've experienced with it. I have deleted the underhood A/C components. Today, I replaced the stock fans with 2 derale pushers using the stock fan controls to trigger the relays to the 2 fans. But still, only the passenger fan comes on at what i assume is high speed at 225ish.
Last edited by Fat Jesus 808; Oct 20, 2014 at 07:59 PM.
LS1 F-body fan operation:
At low speed, the relays connect the fans in series which puts 1/2 voltage to both fans causing them to both run at 1/2 speed.
At high speed, the relays connect the fans in parallel which puts full voltage to both fans causing them both to run at full speed.
LT1 F-body fan operation:
At low speed one fan runs at full voltage causing it to run at full speed.
At high speed, both fans run at full voltage causing both to run at full speed.
At low speed, the relays connect the fans in series which puts 1/2 voltage to both fans causing them to both run at 1/2 speed.
At high speed, the relays connect the fans in parallel which puts full voltage to both fans causing them both to run at full speed.
LT1 F-body fan operation:
At low speed one fan runs at full voltage causing it to run at full speed.
At high speed, both fans run at full voltage causing both to run at full speed.
Either you have the wiring or the relays wrong.
Your opening post first says passenger fan works then you say the left fan works.
At any time, do both fans come on full speed?
Your opening post first says passenger fan works then you say the left fan works.
At any time, do both fans come on full speed?
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Thread Starter
TECH Apprentice
iTrader: (5)
Joined: Feb 2014
Posts: 330
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From: Creswell, Oregon
So I unplugged the passenger side fan and at 235ish the drivers fan came on, I then plugged in the passenger side fan, both were running until it dropped back to 225, then only the passenger side was running until it dropped to 215. I'm gonna say they work fine and I'm just a dummy.
Thanks for the suggestions and insight on how they opperate.
Thanks for the suggestions and insight on how they opperate.
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It sounds like they're running LT1 style.
When these fans run, they're at full speed?
The PCM just sends out two grounds. The LT1 setup has two relays, the LS1 setup has three. It's the wiring harness that says how the fans operate.
When these fans run, they're at full speed?
The PCM just sends out two grounds. The LT1 setup has two relays, the LS1 setup has three. It's the wiring harness that says how the fans operate.