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Radiator Fan not Turning On

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Old Mar 10, 2023 | 08:16 PM
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Radiator Fan not Turning On

Just finished installing a subwoofer in my 92 Trans Am and now the radiator fan will not turn on and it is causing the car to overheat. Any ideas what could have happened?

I’m assuming the subs are drawing too much power so the fan can’t get enough but don’t know how to fix it.
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Old Mar 11, 2023 | 10:51 AM
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Car: 1984 T/A
Engine: LQ4
Transmission: T56
Axle/Gears: Ford 8.8 4.10 gears
Re: Radiator Fan not Turning On

Have you checked the fan switch to see that it is still connected? The fan switch is located on the passenger head between 6 and 8. When you turn the hvac controls to AC does the fan come on?
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Old Mar 11, 2023 | 10:56 AM
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Re: Radiator Fan not Turning On

Sorry. New to cars. What do you mean by “passenger head between 6 and 8”?
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Old Mar 11, 2023 | 05:15 PM
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Car: Resto-Mod 1987 IROC-Z Clone
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Re: Radiator Fan not Turning On

Where are you Connecting the Amplifier 12v Positive and Negative Cables?

How did you connect them?
And are you using a Fuse?
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Old Mar 25, 2023 | 12:15 PM
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Re: Radiator Fan not Turning On

@punkmaster98 , the fan does come on when I switch on the AC. But if that is switched off, the radiator fan does not come on.

@vorteciroc , power is running to the battery positive and the negative is grounded. Yes, I’m using the fuse that came with the amplifier. The remote wire is wrapped around the 20amp fuse for the fan in the fuse box. That 20amp fuse is still good. Even switched it to a new one just to be safe. Also took the remote wire off of the fuse and still no fan.
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Old Mar 26, 2023 | 05:40 PM
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Re: Radiator Fan not Turning On



So, I got the car lifted today and looked underneath for any possible disconnects. I’m not sure what I’m looking for but I took a picture. It didn’t look like anything was disconnected.
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Old Mar 26, 2023 | 05:59 PM
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Re: Radiator Fan not Turning On

What’s with the new electrical tape on the fan wire ?
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Old Mar 26, 2023 | 06:05 PM
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Re: Radiator Fan not Turning On

Not sure. Was that way when we bought it. Haven’t done anything to that wire.
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Old Mar 26, 2023 | 06:19 PM
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Re: Radiator Fan not Turning On

Have you commanded on and wiggled that connection or tested for power or ground loss ?
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Old Mar 26, 2023 | 07:02 PM
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Re: Radiator Fan not Turning On

It comes on if I turn on the AC. So I know I have power.
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Old Mar 26, 2023 | 07:06 PM
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Re: Radiator Fan not Turning On

What about primary fan with jumping the aldl A to B ?
btw 3.1l, tpi or tbi dual or single fan ?

Last edited by Tuned Performance; Mar 26, 2023 at 07:19 PM.
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Old Mar 26, 2023 | 07:22 PM
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Re: Radiator Fan not Turning On

3.0 305L, single fan
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Old Mar 26, 2023 | 07:24 PM
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Re: Radiator Fan not Turning On

Originally Posted by kaleleric
3.0 305L, single fan
3.0 ? I guess tbi 305 ? Try turning key on and grounding the cylinder temp switch in your picture. Between cylinder 6 & 8 if fan comes on might want to replace with wells sw555 .
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