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1992 Chevy Lumina 6 cylinder radiator fans not coming on



 
 
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  #1  
Old August 5th 06, 11:53 PM posted to rec.autos.tech
Roscoe[_1_]
external usenet poster
 
Posts: 11
Default 1992 Chevy Lumina 6 cylinder radiator fans not coming on

Hi Everyone,

I'd like to thank everyone ahead of time for all the help. I have a
1992 Chevy Lumina, 6 cylinder, I think 3.1. I have ran my car with the
air conditioning on and the 2 Radiator fans I have in my car do not
come on, ever. When I turn the air conditioner on should at least one
fan start immediately or not? Where do I need to look or what do I need
to do to fix this? I've checked the fan motors and they work fine.
I've got my repair manual and I think it's some kind of thermostat
or temperature control, which is why I'm asking you guys.

Thanks for the help
Roscoe

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  #2  
Old August 6th 06, 02:11 AM posted to rec.autos.tech
Shep
external usenet poster
 
Posts: 146
Default 1992 Chevy Lumina 6 cylinder radiator fans not coming on

They come on at 222 dgerees, so a scanner is required to see the temps and
check if they work, check if there is 12v to them , the pcm grounds the
relay based on ac pressure and/or engine temps.
"Roscoe" > wrote in message
ups.com...
> Hi Everyone,
>
> I'd like to thank everyone ahead of time for all the help. I have a
> 1992 Chevy Lumina, 6 cylinder, I think 3.1. I have ran my car with the
> air conditioning on and the 2 Radiator fans I have in my car do not
> come on, ever. When I turn the air conditioner on should at least one
> fan start immediately or not? Where do I need to look or what do I need
> to do to fix this? I've checked the fan motors and they work fine.
> I've got my repair manual and I think it's some kind of thermostat
> or temperature control, which is why I'm asking you guys.
>
> Thanks for the help
> Roscoe
>




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  #3  
Old August 6th 06, 05:36 AM posted to rec.autos.tech
Scott Buchanan
external usenet poster
 
Posts: 78
Default 1992 Chevy Lumina 6 cylinder radiator fans not coming on

Relay

"Roscoe" > wrote in message
ups.com...
> Hi Everyone,
>
> I'd like to thank everyone ahead of time for all the help. I have a
> 1992 Chevy Lumina, 6 cylinder, I think 3.1. I have ran my car with the
> air conditioning on and the 2 Radiator fans I have in my car do not
> come on, ever. When I turn the air conditioner on should at least one
> fan start immediately or not? Where do I need to look or what do I need
> to do to fix this? I've checked the fan motors and they work fine.
> I've got my repair manual and I think it's some kind of thermostat
> or temperature control, which is why I'm asking you guys.
>
> Thanks for the help
> Roscoe
>



  #4  
Old August 6th 06, 12:50 PM posted to rec.autos.tech
Roscoe[_1_]
external usenet poster
 
Posts: 11
Default 1992 Chevy Lumina 6 cylinder radiator fans not coming on


Yea Scott I think it's a relay to. You know I took it to a shop and
they said it worked fine, this was a couple of years ago. Could it be
that the relay was working off and on and now it's gone all the way
out. Yea, I'll put a meter on it today but I've pulled the motors and
check them,that was easy. I don't have a meter, got to borrow one, but
I'm going to change the relay if it needs it or not. I've ran the car
with the air on in 90 degree heat for an hour and still no fans either
one. Thanks , I'll let you know how it goes.

Roscoe

  #5  
Old August 6th 06, 07:24 PM posted to rec.autos.tech
Scott Buchanan
external usenet poster
 
Posts: 78
Default 1992 Chevy Lumina 6 cylinder radiator fans not coming on

Try this: Ground the diagnosis terminal. Looking at the scan tool connector
under the steering wheel, connect the two terminals top row to the right.
Just bend a short piece of wire and plug it into the two connectors. Turn
the key to on. The fans should come on.

If they do not turn on, check fuses and replace relay with known good one.

Report results.

"Roscoe" > wrote in message
oups.com...
>
> Yea Scott I think it's a relay to. You know I took it to a shop and
> they said it worked fine, this was a couple of years ago. Could it be
> that the relay was working off and on and now it's gone all the way
> out. Yea, I'll put a meter on it today but I've pulled the motors and
> check them,that was easy. I don't have a meter, got to borrow one, but
> I'm going to change the relay if it needs it or not. I've ran the car
> with the air on in 90 degree heat for an hour and still no fans either
> one. Thanks , I'll let you know how it goes.
>
> Roscoe
>



  #6  
Old August 6th 06, 07:47 PM posted to rec.autos.tech
Scott Buchanan
external usenet poster
 
Posts: 78
Default 1992 Chevy Lumina 6 cylinder radiator fans not coming on

Just noticed that both fans use the same ground location. Check that too.


"Scott Buchanan" > wrote in message
...
> Try this: Ground the diagnosis terminal. Looking at the scan tool

connector
> under the steering wheel, connect the two terminals top row to the right.
> Just bend a short piece of wire and plug it into the two connectors. Turn
> the key to on. The fans should come on.
>
> If they do not turn on, check fuses and replace relay with known good one.
>
> Report results.
>
> "Roscoe" > wrote in message
> oups.com...
> >
> > Yea Scott I think it's a relay to. You know I took it to a shop and
> > they said it worked fine, this was a couple of years ago. Could it be
> > that the relay was working off and on and now it's gone all the way
> > out. Yea, I'll put a meter on it today but I've pulled the motors and
> > check them,that was easy. I don't have a meter, got to borrow one, but
> > I'm going to change the relay if it needs it or not. I've ran the car
> > with the air on in 90 degree heat for an hour and still no fans either
> > one. Thanks , I'll let you know how it goes.
> >
> > Roscoe
> >

>
>



  #7  
Old August 7th 06, 02:58 PM posted to rec.autos.tech
Roscoe[_1_]
external usenet poster
 
Posts: 11
Default 1992 Chevy Lumina 6 cylinder radiator fans not coming on


Thanks for all your help Scott,

I called it a day on Sunday, I'll report back and let you know
again thanks, this is
driving me out of my mind.

  #8  
Old August 13th 06, 07:08 AM posted to rec.autos.tech
Scott Buchanan
external usenet poster
 
Posts: 78
Default 1992 Chevy Lumina 6 cylinder radiator fans not coming on

It seems extremely unlikely that both relays would go bad at the same time.
You can swap with a known good relay and redo the test. If still no go, I'd
check the grounds. Easiest way is to remove the fan connector and use a
multimeter to check for continuity to ground. If this checks good I can give
instructions on how to probe the relay socket to see if the computer is
sending voltage.


"Roscoe" > wrote in message
ps.com...
>
> Hi Shep & Scott,
>
> I live paycheck to paycheck and get paid next Friday. I tried
> the wire and the
> fans did not come on. Will replace the relays and let you
> know.
> Thanks
> Roscoe
>



 




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