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post #1 of (permalink) Old 12-07-2001, 01:53 AM
Wrangler88
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electric fans...how to wire them up

my buddie gave me an electric fan out of a dodge daytona, its the perfect width for my YJ's radiator, the question is, do i just wire it in so it runs all the time? and have a switch to turn off if i go threw water? or how do i make it so it turns on at a certain temperature? also do i have to watch out for anything when i take my clutch fan off? thanks guys!

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post #2 of (permalink) Old 12-07-2001, 02:10 AM
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Re: electric fans...how to wire them up

Ive got mine on when the key comes on. I also have a switch to turn it off. You can also buy a thermostat from Napa to make it come on at a certain temp. My .02cents
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post #3 of (permalink) Old 12-07-2001, 02:21 AM
 
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Re: electric fans...how to wire them up

Wrangler,

A couple of notes here:

1) if you are running a 4 cyl, then another GREAT swap is from a late model Nissan Maxima with a V6. It fits perfectly has two fans, and one is even a dual speed fan.

2) regardless of what you decide to do, use a relay for the fan. Then go from the relay to your switch.

3) The best situation I could see for this would be: go from a hot wire that is only on when the ignition is on and make that the "supply leg" on your switch. Take that to the relay from above and wire it appropriately. From the relay if you elect to use a thermostat, you can wire it in between the relay and the fans themselves.

With the setup above, you will be able to get the following behaviors:
A) only on when the key is on. if you turn off the key, the fans go off.
B) if the switch is on it will only come on if it is hot enough to turn the fan on (with the thermostat in the ckt).
C) if it is on and you elect to turn it off for say a water crossing, you can do it by turning off the switch.

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