Electric fan on/off temp - JeepForum.com

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post #1 of 19 Old 07-04-2013, 09:04 AM Thread Starter
jvg
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Electric fan on/off temp

So i got a junkyard Taurus fan to convert to electric fan. I just put a new radiator water pump and thermostat in. The clutch fan i didn't replace and i don't think its working properly. Looks off centered and "wobbly". I'm looking for a controller to control the on/off of the electric fan. I don't want to just run it on a manual switch.

Question is what temp should i turn the fan on and then off at? I have a 195 thermostat. And i have the 4.0.

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post #2 of 19 Old 07-04-2013, 09:14 AM
Louie4
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I run the Hayden probe kit that I got from O'Reilly's for $20. I have it set to cut on around 210 degrees F. You want the 4.0L to run a little warmer since it's fuel injected.

http://www.amazon.com/Hayden-Automot.../dp/B000C39C6I

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post #3 of 19 Old 07-04-2013, 09:30 AM
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http://www.jeepforum.com/forum/f12/f...cheap-1325896/

It's a huge thread now, but contained inside are more ways to do it than you'll ever want to know about. I use a Porsche temp switch located in the top radiator hose with a housing made from a piece of exhaust tubing and a spindle nut for a mazda 5. The switch goes to a volvo 2 spped fan controller relay. I know that what I just said doesn't make any sense, but it will after you start reading.

Put simply, I'm getting true 2 speed fan functionality that comes on (and goes off) when it's supposed to primarily from junkyard parts.

“The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed.” ― Robert M. Pirsig, Zen And The Art Of Motorcycle Maintenance: An Inquiry Into Values
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post #4 of 19 Old 07-04-2013, 09:50 AM
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Mine goes on at 205 or 210 and off at 195. At 220 the high speed circuit kicks in.
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post #5 of 19 Old 07-04-2013, 09:58 AM Thread Starter
jvg
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Quote:
Originally Posted by Louie4 View Post
I run the Hayden probe kit that I got from O'Reilly's for $20. I have it set to cut on around 210 degrees F. You want the 4.0L to run a little warmer since it's fuel injected.

http://www.amazon.com/Hayden-Automot.../dp/B000C39C6I
I don't think that will work with a Taurus fan. That says it has a 30 amp relay and my understanding is that on start up the Taurus fan pulls around 50-60 amps.
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post #6 of 19 Old 07-04-2013, 10:06 AM Thread Starter
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Originally Posted by jeepster93 View Post
Mine goes on at 205 or 210 and off at 195. At 220 the high speed circuit kicks in.
What kind of controller do you have?
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post #7 of 19 Old 07-04-2013, 10:12 AM
GrantYJ
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Quote:
Originally Posted by jvg View Post

I don't think that will work with a Taurus fan. That says it has a 30 amp relay and my understanding is that on start up the Taurus fan pulls around 50-60 amps.
Louie's set up will work fine with the low speed side of the Taurus fan (as I understand it, that set-up only operates on/off, not on-low/on-high/off). My two speed set-up is running on a 40 amp fuse and relay for the ignition tripped power to the Volvo fan relays. Since it always has the low speed fan on before tripping the high speed fan, you don't have the big inrush.

The low speed fan has a much lower inrush.

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post #8 of 19 Old 07-04-2013, 10:34 AM Thread Starter
jvg
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Originally Posted by GrantYJ View Post
Louie's set up will work fine with the low speed side of the Taurus fan (as I understand it, that set-up only operates on/off, not on-low/on-high/off). My two speed set-up is running on a 40 amp fuse and relay for the ignition tripped power to the Volvo fan relays. Since it always has the low speed fan on before tripping the high speed fan, you don't have the big inrush.

The low speed fan has a much lower inrush.
Ok. Maybe a dumb question but do i need to use both low and high speeds? or will the low speed cool enough?
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post #9 of 19 Old 07-04-2013, 10:57 AM
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Quote:
Originally Posted by jvg View Post

Ok. Maybe a dumb question but do i need to use both low and high speeds? or will the low speed cool enough?
I've only had mine in since spring and my cooling system works very well, but I've never had my high speed fan kick on. I tested all the components individually, so I know it works, but it's never needed more than the low speed fan for my 4 banger.

“The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed.” ― Robert M. Pirsig, Zen And The Art Of Motorcycle Maintenance: An Inquiry Into Values
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post #10 of 19 Old 07-04-2013, 11:17 AM
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I am using a DCC. ( http://www.dccontrol.com/relay_controllers.htm ) The 2SP2 controller is what I have.
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post #11 of 19 Old 07-04-2013, 11:48 AM Thread Starter
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Originally Posted by jeepster93 View Post
I am using a DCC. ( http://www.dccontrol.com/relay_controllers.htm ) The 2SP2 controller is what I have.
Yeah i was checking that one out yesterday. Installation pretty straight forward? I've read that the guy that makes then is horrible at responding and it takes forever to get it after ordering it.

I was reading on the instructions for the controller that its adjustable by turning the screws. But it doesn't say which screw if for which fan speed. I'm assuming S1 is for low speed and S2 is for high speed? Is that correct?

http://www.dccontrol.com/2sp2.pdf
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post #12 of 19 Old 07-04-2013, 11:57 AM Thread Starter
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And whats the purpose of the L102 indicator on his site? I read the description but i don't understand what it does. Sounds like it switches from low to high speed, but i thought that the 2sp controller already did that?
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post #13 of 19 Old 07-04-2013, 01:08 PM Thread Starter
jvg
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Ok now even more confusion. I just hooked up the 94 Taurus fan I pulled my self out of the car at pull a part. It's a pusher fan. Now this makes no since to me because I see everyone installing them engine side. Which means the fan would be pushing against the incoming air when driving? Did I grab a wrong fan? it's a stock fan from a 94 Taurus. I thought 90-95 werethe ones to get. it does have the two speeds. that worked well. it was just pushing not pulling.
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post #14 of 19 Old 07-04-2013, 01:19 PM
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which side of the radiator did you get the fan from? How did you hook up your wires? Some motors will run backwards when you reverse the poles, but since you have three wires on the fan and only one of them is black (the ground) it seems pretty simple.
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post #15 of 19 Old 07-04-2013, 01:27 PM Thread Starter
jvg
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that's the confusing part. the fan was motor side like it was a pull not a push fan. with three wires, one ground, one low speed and one high how could you reverse the polarity? it's not possible right?
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