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Old 09-30-2009, 09:50 PM
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2 speed cooling fan

I just bought a Walker CCI-1770 fan/shroud combination. the fan has 3 wires and they say to connect the two positive wires together the brown one and the grey one, then black to ground. run power thru a 70 amp relay. my question is can I run just one hot leg for low speed and then connect the other hot leg when high is needed? both together produce high speed and either grey or brown individualy produce low speed.

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Old 10-01-2009, 06:43 AM
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You most certainly can, but it will require a relay for low and another for high.

Vince
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Old 10-01-2009, 12:46 PM
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Quote:
Originally Posted by 71corvette
I just bought a Walker CCI-1770 fan/shroud combination. the fan has 3 wires and they say to connect the two positive wires together the brown one and the grey one, then black to ground. run power thru a 70 amp relay. my question is can I run just one hot leg for low speed and then connect the other hot leg when high is needed? both together produce high speed and either grey or brown individualy produce low speed.
My question would be "why"? The whole point of an electric fan is to be able to turn it off when you don't need it. Why aren't the two speeds simply "off" and "on"?
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Old 10-01-2009, 12:56 PM
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Because of the noise fans
make on high. I have a 4 core aluminum radiator and with the 5.3 low speed will handle it 90 percent of the time
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Old 10-01-2009, 09:40 PM
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Mine stays on high, And the only time it goes off is when the key is off.
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Old 10-01-2009, 10:22 PM
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Mine stays on high, And the only time it goes off is when the key is off.
that would not work on my fuel injected 5.3. it would never reach operating temps for the computer to work properly. they like to run in the 200-220 degree range. I have seen many very nice cars drive up and the first thing you hear is the electric fan running. maybe I am just wierd but i dont want to hear the fan running, I would rather listen to it lope with the big cam.
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Old 10-01-2009, 10:46 PM
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i dont want to hear the fan running, I would rather listen to it lope with the big cam.

Never had that problem with any of my cars..
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Old 10-05-2009, 03:38 PM
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same situation

I got the same situation as you 71corvette, and I don't understand how to wire it to a temp sensor to get the fan to come at low and then later on high as the temp dictated. Do you need 2 temp sensors? Temp sensors, from what I can figure out, are just variable resistore. They don't seem to come in varing temp settings like a thermostat. So how do you wire it so the 2 speeds will come on at different temps? Can it be done with one sensor?
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Old 10-07-2009, 05:13 AM
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Originally Posted by daoldbuick
I got the same situation as you 71corvette, and I don't understand how to wire it to a temp sensor to get the fan to come at low and then later on high as the temp dictated. Do you need 2 temp sensors? Temp sensors, from what I can figure out, are just variable resistore. They don't seem to come in varing temp settings like a thermostat. So how do you wire it so the 2 speeds will come on at different temps? Can it be done with one sensor?
you will need 2 two temp sensors or an electronic controller, hey make temp sensors that have a turn on and turn off temp. I am using my factory engine control computer, it has high and low speed controls built in. two temp sensors would be easy to do also. try summit or jegs for the sensors
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Old 10-07-2009, 07:44 AM
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Why not call Walker at 1-800-821-1970 and ask them about connecting the motor leads for high and low operation.
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Old 10-07-2009, 10:45 AM
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Variable Speed Control

This is what I use, works very good. More Info in the Pdf.
http://www.flex-a-lite.com/auto/html...cessories.html
http://www.flex-a-lite.com/auto/31165-99943.pdf
Got it cheap on Evilbay.
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Old 10-07-2009, 07:06 PM
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Originally Posted by jaguarxk120
Why not call Walker at 1-800-821-1970 and ask them about connecting the motor leads for high and low operation.
thanks for the number, nothing came with the fan except to say use a 70 amp relay
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