Join Date: May 2001
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Re: electric fans...how to wire them up
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.
'83 CJ-7 nothing original but the tub and axle tubes