How to modify a radiator fan?

j wrote:
> What is an easy procedure to make the electric radiator fan run constantly
> when the ignition key is on? Thank you.
>
>
Wire it to the ignition circuit..

I forgot to mention that it is a 94 Chevy Corsica with a 6 cylinder engine.


"j" <[email protected]> wrote in message
news:p4qdk.23368$co7.2377@nlpi066.nbdc.sbc.com...
> What is an easy procedure to make the electric radiator fan run constantly
> when the ignition key is on? Thank you.
>

"j" <[email protected]> wrote in message
news:f5tdk.12003$cW3.892@nlpi064.nbdc.sbc.com...
>I forgot to mention that it is a 94 Chevy Corsica with a 6 cylinder engine.

One way is to find an ignition wire that is "hot" when the key is "on" and
wire it to the cooling fan relay, so that the relay is energized when the
ignition is on. If it's like the 1989 Corsica V6, the cooling fan relay is
controlled by the ECM (computer) which basically grounds the circuit to turn
it on. You'll need to remove the 2 control circuit wires (not the POWER
circuit wires) from the fan relay, run the ignition "hot" wire to one of the
terminals, and run a wire from ground to the other terminal.






>
> "j" <[email protected]> wrote in message
> news:p4qdk.23368$co7.2377@nlpi066.nbdc.sbc.com...
>> What is an easy procedure to make the electric radiator fan run
>> constantly when the ignition key is on? Thank you.
>>
>
>

Thanks very much for that information. You guys in this newsgroup have
helped me several times over the years and I appreciate it. Based on what
you said, it appears that the fan motor always has +12v but depends on the
relay to throw it a ground to turn on.
"SRN" <[email protected]> wrote in message
news:3Ludk.27381$i55.9895@newsfe22.lga...
>
> "j" <[email protected]> wrote in message
> news:f5tdk.12003$cW3.892@nlpi064.nbdc.sbc.com...
>>I forgot to mention that it is a 94 Chevy Corsica with a 6 cylinder
>>engine.
>
> One way is to find an ignition wire that is "hot" when the key is "on" and
> wire it to the cooling fan relay, so that the relay is energized when the
> ignition is on. If it's like the 1989 Corsica V6, the cooling fan relay is
> controlled by the ECM (computer) which basically grounds the circuit to
> turn it on. You'll need to remove the 2 control circuit wires (not the
> POWER circuit wires) from the fan relay, run the ignition "hot" wire to
> one of the terminals, and run a wire from ground to the other terminal.
>
>
>
>
>
>
>>
>> "j" <[email protected]> wrote in message
>> news:p4qdk.23368$co7.2377@nlpi066.nbdc.sbc.com...
>>> What is an easy procedure to make the electric radiator fan run
>>> constantly when the ignition key is on? Thank you.
>>>
>>
>>
>
>

On Jul 10, 4:59 pm, "SRN" <[email protected]> wrote:
> "j" <[email protected]> wrote in message
>
> news:f5tdk.12003$cW3.892@nlpi064.nbdc.sbc.com...
>
> >I forgot to mention that it is a 94 Chevy Corsica with a 6 cylinder engine.
>
>  One way is to find an ignition wire that is "hot" when the key is "on" and
> wire it to the cooling fan relay, so that the relay is energized when the
> ignition is on. If it's like the 1989 Corsica V6, the cooling fan relay is
> controlled by the ECM (computer) which basically grounds the circuit to turn
> it on. You'll need to remove the 2 control circuit wires (not the POWER
> circuit wires) from the fan relay, run the ignition "hot" wire to one of the
> terminals, and run a wire from ground to the other terminal.
>
>
>
>
>
> > "j" <[email protected]> wrote in message
> >news:p4qdk.23368$co7.2377@nlpi066.nbdc.sbc.com...
> >> What is an easy procedure to make the electric radiator fan run
> >> constantly when the ignition key is on? Thank you.- Hide quoted text -
>
> - Show quoted text -

maybe just switching the air conditioning on....

i think its not a good idea. I think you should hook it up the way it
was designed to work. If it runs constantly you are placing excessive
strain on your battery and altenator.

In article
<[email protected]>,
[email protected] wrote:

> i think its not a good idea. I think you should hook it up the way it
> was designed to work. If it runs constantly you are placing excessive
> strain on your battery and altenator.

Not to mention wasting fuel.

[email protected] wrote:
>
> i think its not a good idea. I think you should hook it up the way it
> was designed to work. If it runs constantly you are placing excessive
> strain on your battery and altenator.

And if the OP needs it to work this way, there is another problem that
needs to be diagnosed.

--
Paul Hovnanian mailto:[email protected]
------------------------------------------------------------------
I want to die quietly in my sleep, like my grandfather,
not screaming in terror, like his passengers.

Paul Hovnanian P.E. wrote:
> [email protected] wrote:
>> i think its not a good idea. I think you should hook it up the way it
>> was designed to work. If it runs constantly you are placing excessive
>> strain on your battery and altenator.
>
> And if the OP needs it to work this way, there is another problem that
> needs to be diagnosed.
>

the problem is he probably needs an ECM and on an old car like that it's
not worth the money.

A friend had an 86? Cavalier with the same thing - the ECM controlled
the fan and a replacement ECM would have doubled the value of the car,
so he just wired up a toggle switch for the fan and watched the temp
gauge. It was a beater, so that's an ok fix, but it's definitely not a
proper switch - wire it up wrong and leave it on = dead battery... leave
it on all the time = overcooling the motor, forget to turn it
on=overheat. That's why it's a hack.

Ray