Wiring Altima electric fans into an S14
By: matt4pl
I wanted stock functionality, where as most of the installs I’ve read about have the fans wired to turn on high with the car, which wastes power, shortens the life span of the fans, etc.
now I have a diagram to post up of exactly what I did.
Here’s the stock wiring diagram, taken from the FSM I believe (used the chiltons, its simpler, also, my diagram is based off the chiltons)
…and this is the modified one:
I tapped two 30A relays, one each into the stock relays, to control the power to the 2nd fan. I ran power from the terminal inside the fuse box in the engine bay to those relays, then out to the 2nd fan.
Then I ran the two new power wires out to the 2nd fan, made a notch in one of the covers for the stock harness, put the wires through there.
I ran the ground wires to the battery but it’s not neccessary, since you can ground them to the chassis anywhere or in my case, run them to one of the aftermarket ground wire connections on the motor.
1st fan gets plugged into the stock plug:
2nd fan gets wired to the two newly installed relays, the green wires are the power wires I believe:
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