I have a 2.2 and I want to install a manual switch inside the car for the cooling fan. I read every forum on fan switchs but I just can't figure it out. Im just wondering how to hook up a switch to the relay to turn on the low speed fan manually. Here's a picture from a forum on here. Not sure if this is right but even if it is I just need help on why and how to hook up another relay between the switch and the fan relay.


Here's a better close up

 

My friend is an electrical engineering student I'll have him look at this. You could always just turn your A/C on... fan goes on automatically when the air is running.

 

You dont understand how or why to hook up a manual switch but you want to? Interesting.

These schematics provide all you need to perform this mod. If you cant interpret whats detailed here you probably dont have the skills to do this safely.

$.02

 

you could reach down by your fan, take off the wire loom holding 3 wires.
ones ground, i believe white?
and this leaves you with 2 others one for high speed one for low speed. bam there you go

 

I know fairly about wiring. I'm just wandering if you need to put in this extra relay?
Can you just run a hot from the switch to the relay?
Or just run a hot straight to the fans low speed motor?

 

the relay is cause once you hit the dash switch the fans powered directly through the relay. try it without the relay if you want but i'm pretty sure you'll burn your car down.

 

you know about wiring and want to know if you can just run a hot wire straight to the motor????.........


If you do that how exactly would you control it?

Nah, thats what they make 12gauge wire for. But the question remains why on earth would you NOT want a relay unless you dont understand how they work/how to install.

 

he wants a manual switch to turn it on when ever he wants. thats what im getting out of this... I wanted to do this as well but i couldnt figure out how to make it so that i could manually control the fan either.

 

I HAVE MINE MANUALLY RAN TO A SWITCH. hahah
i can turn mine on and off whenever i please.

do you guys want this? i have mine set to the high fan speed.

 

The schematic shows HOW TO DO IT........................... /thread. WTF

 

I would like low speed, thanks

 

that schematic doesn't tell you how to do it. it just points to two wires on either side of the relay. doenst tell you if you have to intercept the signals, or tap the signals or leave connected to the relay, or disconnect from the relay. doenst tell you ****.

it's easier buying a twin 8 inch after market electric fan and wiring it up and running a switch, why, because there are instructions step by step that any monkey can follow.

This schematic isnt "sailor proof" in other words it doenst have a step by step that holds your hand for you to make sure you cant f--- something up.

 

okay tommorow morning i will post what wire is high speed, low speed and ground.

 

you should make a how to for it.

 

Thanks Preston. I think a switch for low speed and then a separate switch for high speed would be nice. I know the schematic seems to show this but I like seeing actual pictures along with step by step directions.
I'm surprised there isn't already a how-to on this. I live in TX so it's pretty warm here. It was 103 today and I still drive around with my windows down.

 

Unwrap the wire loom(coming off the fan.)
three wires
Purple is low fan speed.
Blue is High fan speed
White is ground.

then just wire is to a switch and your set.

 

Easiest way to do this is buy a DashHawk and manually turn the fans on through the DashHawk, I do it all the time in my SS/TC and I did do it in my LS

 

This is also the cheapest way ^ hah

granted i do not know how much dashHawks are..but this cost me like 5 dollars tops.

 

any one local wanna do this for me?

 

I dont wanna do it, but i will for a fee.

 

and how much would that be? lol

and would doing this really have any positive effects?

cause i mean 189 static temp with it going a bit higher when not moving doesn't seem to bad.

 

that is a normal temp. I am runnign it to a switch because currently i have no heat exchanger and i am supercharged..so i just run it to a switch til my heat exchanger gets here

 

Hey you guys are all doing something thats good and bad and heres my reasoning:

alrighty I went through that diagram - (I am a computer engineering student myself) - and heres what I came up with...the PCM controls the fan by either closing the ground on either relay, therefore allowing the relay to transfer juice to the fan. The problem I see with what yall are proposing is that simply splicing in another relay or going in before the relay is wayyy too difficult. The easy way is just to look at it simply.

The power is always supplied and there is always a ground for the fan, the only thing that keeps it from going is just the PCM giving the relay a ground, and if your going to start chopping into wires that go directly to your PCM...your a braver man than I....

The easy way would be to run a fused automotive switch and a potentiometer on your dashboard....this would allow you to protect your wiring but give you total control over the fanspeed. and it'd be super simple:

the way the system would run is simply this -
Batt+ to 30A fused Switch(for on/off) to potentiometer(to control fan speed) to Fan Wire
OR
Batt+ to Potentiometer with an off setting to Fan wire

Since the fan is already grounded to the its no worries about having to cut into that wire. All the wiriing can run around the edges of your car under the carpet and as long as you do it right, you won't have to worry about a thing. I've hard wired a garage opener, an dc-ac power inverter, and a set of underbody lights directly to the battery with no problems thus far....

(BY THE WAY IF ANYONE WANTS TO KNOW HOW TO COMPLETELY DITCH THE CLUTCH DEPRESS SWITCH LET ME KNOW - I PULLED MINE OUT SO I COULD JUST SIT DOWN AND START THE CAR WITHOUT HAVING TO PRESS THE CLUTCH IN) - ALSO MAKES FOR AN ADDED SECURITY BONUS IF YOU MAKE IT EASILY UNPLUGGABLE - EVEN IF SOMEONE DOES FIGURE OUT HOW TO START YOUR CAR WITHOUT THE RIGHT KEY IF THE SWITCH ISN'T PRESSED IN THE CAR THINKS THE CLUTCH ISN'T PUSHED IN AND THEREFORE WON'T START THE CAR ANYWAYS...

 

DashHawk!!!!!

LOL, sorry I suck at wiring so I would never try this.

My gf's car is rigged in such a way that she turns on the fan manually.
Her Jeep is a POS and the fan is not a feature it's an issue.

 

thanks for the info avenger, I'm going to go look up what a potentiometer is...