Wiring my fans. I'm a n00b

[4g63tcrazy]

Yeah I've searched for a few days on and off and cant really grasp this concept. I feel like I am just having a brain ****. I can rewire my whole engine harness but I can't wire up my fans..

Basically I will be running 2 fans. 1 pusher and 1 puller. I would like to wire them both to come on at the same time by a switch inside the car, with a relay that I will control. Can someone just give me a quick paint drawing of where the wires need to go off the relay? Or do I not even need a relay?

I've read other ways of using the a/c relay but I got rid of that fuse box and I don't like how late my car turns the fans on right now. I also plan on having link turn the check engine light on once temps start climbing so I can't ever forget.

I have another idea. Couldn't I leave the fans wired up to the stock plug but tap into the power wire with the switch so the car will still have control over it, but whenever I feel the need to I could go ahead and turn them on?

[LingLing]

I think you can just tap the power from either a switched or constant power source then run a basic switch between both the power and ground wires.

I would definitely double and triple check my advice, but that's how I wired up my fans on my Integra when the relay stopped kicking them on automatically.

[4g63tcrazy]

That would work if I did not have to use a relay. Just run a power wire to the fans and run a switch into that wire. Just curious if I would need a relay or not. Or if I could leave it hooked up like stock and still run a switch for whenever I felt I wanted to turn them on.

[blackrosenova400]

If you run a switch and no thermostatic switch you would be ok. If you run the thermostatic switch you need to run a relay as the thermostatic switch cannot take the load.

[4g63tcrazy]

Ok so if I wanted to tap into the stock wiring and run a switch to it I would need to use a relay?

Here are some paint drawings I came up with.

Switch only:
http://i224.photobucket.com/albums/dd75/nashmkna/switchonly.jpg

Tapping into stock wiring:
http://i224.photobucket.com/albums/dd75/nashmkna/switchstockplug.jpg

Can someone add how I would run a relay into the second one?

[Alpha D]

You beat me to the drawing. Mine basically is the same idea. Adding the relay makes it complicated i think. Since you will be using the small current to control the large one. I think battery power and a ground should work just fine. With like a inline safety fuse or something.

[Alpha D]

I remember when i was talking to swifty he mentioned wiring his own fans shoot him a pm. Im sure he will help.

[123abc]

All I've ever done is run a wire from the + to the switch, then from the switch to the + on the fan wiring and of course grounding out the fan. I would wire the fans in parallel since you're doing two though.

[blackrosenova400]

Here ya go with a thermo switch

http://www.dsmstyle.com/photopost/data/500/dual_fan.png

[Alpha D]

^^ Now that brings back BAD MEMORY'S (electrical class) Very simple to understand. Thank you very much nova. My question, your gonna have battery voltage magnetizing the coil to pull the armature shut? So then only when the thermistor gets warm enough closing the contact points and then allowing the current to find a way to ground switching the fans on?