Page 1 of 1
After market electric fan wiring
Posted: Wed Mar 08, 2006 9:18 pm
by waldo320
Right now I am wrining in a new electric fan in place of the big one on the drivers side. Trying to do the electrical I want the new fan on all the time how do I do that?, Next on the fan I have black wire and a red one, so doing some testing I can get it to work with the ac on red wire on fan to green wire on harness and it workds, but nothing happens when i conect the red wire on the fan to the red wire on the harness, due the car not being hot and the switch not being on. So how can i over ride the red wire posbibly and make the big fan go all the the time?
Posted: Wed Mar 08, 2006 10:03 pm
by vrg3
Hmm. I'm having trouble parsing your sentences. Are you saying that when you hook the black wires together, and the green wire on the car to the red one on the fan, the fan works when the A/C is on?
And that there's a red wire on your car as well, and connecting it to the red wire on the fan makes the fan work like stock?
What year is your car? My 92 wiring diagram doesn't have those wire colors -- it says that the three wires at the main fan are black, yellow-with-red-stripe, and lightgreen-with-black-stripe.
In any case...
I think you should just not use the stock radiator fan wiring.
Connect the black wire of the new fan to ground.
Connect the red wire to the positive battery terminal through the contacts of a relay, and with a fuse right by the battery terminal. Ground one side of the relay's coil, and connect the other side of the relay's coil to any ignition-switched +12v source.
If you really want to use the factory wiring, let me take another look at the diagrams when I get home.
Posted: Thu Mar 09, 2006 4:03 am
by waldo320
Thanks that worked great and wow a 1,500 cfm fan really makes a diffrence!
Posted: Thu Mar 09, 2006 7:57 pm
by BAC5.2
Which fan did you get that flows 1500cfm?
Won't running it constantly cause some problems with long life?
Posted: Thu Mar 09, 2006 9:39 pm
by waldo320
It is a 14" summit electric fan flows 1500 cfm fits pretty good, but my main want is for the track I want a fan that I can turn on anytime and not wait for the ecu to tell it to turn on. Long life = waranty .
Posted: Thu Mar 09, 2006 10:20 pm
by Subtle
Wow---with that flow you sure want to have the polarity right.
Otherwise would drop your top speed by 5mph, at least.
