Topic: wiring electric fan

[cletz97]

i wanna wire my fan so it will turn on and off with the switch, but also have an adjustable thermostat.
does anyone know the right wire to go into?
also any wiring diagrams for this set up?

[Jeffy]

Add the thermostat and switch to the +12 Key source off the relay.

[Bounty Hunter]

Yes, switch goes inline to the power to the thermostat.  DcControl makes a great variable fan controller if you're interested.

[cletz97]

where is the wire relative to the fuse box and the battery?
and do u know the color?

[Bounty Hunter]

So you already have an electric fan?

[cletz97]

im picking it up today, and wanted to do it this weekend cause its gonna be high 60s around me
thats if i finish installing new injectors, throttle body and intake
im getting the ford tourus (cant spell) fan

[Bounty Hunter]

where is the wire relative to the fuse box and the battery?
and do u know the color?

You need to run your own wiring if you're replacing a mechanical fan with an electric fan.

[chardrc]

You need to run your own wiring if you're replacing a mechanical fan with an electric fan.

i think he was more asking where/ what wire from the power box you can tap out of for the fan.

[jfrabat]

I ran mine directly to the postive battery terminal.  And the way I wired it is that I have 40A relay (with a 40A fuse next to the battery) connected to the slow speed of the fan and the DCC controller connected to the high speed.  I used a 3 position switch and connected the bottom position to the DCC controller (auto) and the top postition to the relay (override on) and left the center position as off (for river crossings and such) and ran the low current wires to the relays under the hood (I dont like to have high currents inside the dash; fire risk!).  Just make sure you use the correct gauge of wires for everything (it will change based on length).  And by the way, I also recommend the DCC controller Bounty mentioned...

[cletz97]

yea i like that idea of the controller box i just ran out of money for my jeep so i have to wire myself
so your fan is on a switch? and does it only come one when it is needed to be on?
i was gonna run the wires so it would only get power when the ignition was on, then only run when the engine needs to be cooled
i didn't really wanna deal with switches cause i don't plan many water crossings and i don't wanna leave it on and kill my battery
cause i already run lights and a sound system so i figured the battery will die easy with all that.
and chardrc that is what i was looking to do so the fan wouldn't run with out the engine on
also where can i pick up a thermostat? my fan didn't come with one

[jfrabat]

so your fan is on a switch?

Yes and no; the switch decides if the DCC controller or the relay control the fan.

and does it only come one when it is needed to be on?

Only when the DCC controller is chosen to control the fan; if the relay is used, the fan stays on as long as the ignition is on.

i was gonna run the wires so it would only get power when the ignition was on, then only run when the engine needs to be cooled
i didn't really wanna deal with switches cause i don't plan many water crossings and i don't wanna leave it on and kill my battery
cause i already run lights and a sound system so i figured the battery will die easy with all that.

My switch is powered from an ignition source, which means with the key off, there is no juice going to the wire, which means no juice gets to th relay, so the fan cannot run if the ignition is off.

[redjeep303]

all i did with mine was ran one wire to the a ground and the positive wire thru the fire wall and plugged it into the ingition fuse under the stering wheel

[Bounty Hunter]

You have to be aware of the amperage draw of the fan vs. the size wire you use, and the location of the power source.  You also need the appropriate inline fuse.

[cletz97]

the wires are not going to far but i planned on using a 10 gauge with the 40a fuse, and a 40a relay. and i'm gonna wire it out of an ignition source once i find out where that wire is. still need a thermostat tho, and that should be located between the power source and the positive part of the electric fan right?

[Bounty Hunter]

The thermostat is generally low amperage and should be inline with the low amp switched power feed to the relay, not the high amp side to the relay that in turn goes to the fan.