Taurus eFan wiring diagram help please

ZR2 MIKE · 05-08-2008, 06:38 PM

I looked at many wiring diagrams for the Ford Taurus Dual Speed eFan and really want to do the most cost effective and simple solution with out having to use manual switches or expensive controllers.

I took what I liked from different diagrams and made up my own. I'm not an electrical engineer though, so I need some input from those who know their stuff if my diagram is up to snuff. And if not, what should I do to improve it. Thanks

ZR2 MIKE · 05-08-2008, 07:47 PM

Looks like I need to put a Diode on the AC line. Forgot about that.

ZR2 MIKE · 05-09-2008, 07:30 PM

No one ? ? ?

ZR2 MIKE · 05-09-2008, 07:31 PM

Here's a revised version . . .
-

Blazin_Jason · 05-09-2008, 08:18 PM

Looks like it will work. I will be doing something similar when I finish mine.

ssz28man · 05-12-2008, 06:20 PM

the way you have it set up, when your manual switch or a/c is on the fan will still only come on when the temp prob tells it to. some where in the 4.3 section is a thread that has a similar diagram but works exactly how you were trying to make this one work, don't remember which thread it was though

ssz28man · 05-13-2008, 10:46 AM

see what you think of this, I changed your diagram so that when the truck isn't hot enough to turn the fan on the a/c will still turn it on and get enough air flow to work

ZR2 MIKE · 05-15-2008, 03:03 AM

Quote: Originally Posted by ssz28man

see what you think of this, I changed your diagram so that when the truck isn't hot enough to turn the fan on the a/c will still turn it on and get enough air flow to work

I see what you are saying. Thanks man!

ZR2 MIKE · 05-15-2008, 01:58 PM

How's this look? I took your advice with the diagram mods you showed ssz28man. I like what you did. I also made a few other mods as per some suggestions on another forum. I would like to think is my diagram's final version.

I do have the AC wire on the low side on purpose. I want the AC to run the fan on high only when the radiator gets hotter. The low speed should be more than enough to provide air flow through the ac condenser. And when temps climb, the high speed will automatically kick in. I know it involves a 2nd heat probe but I already have 1 so won't be a big deal to pick up a second one. You will notice optional override switches I included specifically for the 4x4 guys hitting the trails.

Mikz86TA · 05-15-2008, 03:07 PM

Yeah. basically you need the fan on while the AC is on....even if the operating temp is not high enough yet. Air needs to be drawn across the condenser.
I have mine setup a bit differently. I use a relay to the hispeed side which is triggered off of the adjustable temperature probe and also is ignition-based. I use a seperate relay to the lowspeed side which is triggered off of the AC wire. Still used a diode for safety.

ssz28man · 05-15-2008, 04:21 PM

that looks like it'll work, might want to put an off override switch in too for the 4x4s so they can keep the fan off completely if their going through mud. don't wanna suck the fan into the rad

ZR2 MIKE · 05-15-2008, 04:40 PM

Quote: Originally Posted by ssz28man

that looks like it'll work, might want to put an off override switch in too for the 4x4s so they can keep the fan off completely if their going through mud. don't wanna suck the fan into the rad

Thanks. I think it will work good for my needs. And I did include a fan off switch like you suggested, see the right side of the last diagram on the diagram ground circuit, there is a "Optional Override Switch Fan Off" switch

. This switch would interrupt the ground circuit for both relays, forcing the power off to the fan's low and high all together. If you follow the current path, it will dead end at 87a on relay 2.

nolowis2low · 05-15-2008, 04:47 PM

just make it simple and wire regular fans into a relay and manual switch or to run all the time, i have 2 10in and they cool just fine and have no problems with the amp draw.

ZR2 MIKE · 05-15-2008, 05:30 PM

Quote: Originally Posted by nolowis2low

just make it simple and wire regular fans into a relay and manual switch or to run all the time, i have 2 10in and they cool just fine and have no problems with the amp draw.

Thanks, but I have a 5.7 conversion and it runs hot. Thats a completely different situation that what you are running to keep a 2.8 cool. I just installed a Corvette radiator in the forward position (where the ac condenser normally goes) and installed the Ford Taurus fan in the normal puller configuration. Previously I was running dual 12" pushers and they were not cutting it in the summer when the ac was running in traffic. I upgraded to the AD244 HO alternator as well to handle the efan current draw. I don't want manual switches to HAVE to turn the fans on and off, I want it to work automatically as much as possible like it was factory. Running the efans on all the time is kinda crude and is a lot more wear and tear on the fan motors. You don't need fans to run if your thermostat has not opened yet (unless your AC on on). Or when cruising at 75mph on the interstate. I currently have the Taurus efan running on low speed through a temp probe controller and a 30A relay. It is working flawlessly right now. But it isn't summer and AC time yet. On low, the Taurus efan is moving more air than my 12" dual efans ever did. I can put my hand near the grille and feel the air draw nicely.

ssz28man · 05-15-2008, 08:20 PM

Quote: Originally Posted by ZR2 MIKE

Thanks. I think it will work good for my needs. And I did include a fan off switch like you suggested, see the right side of the last diagram on the diagram ground circuit, there is a "Optional Override Switch Fan Off" switch . This switch would interrupt the ground circuit for both relays, forcing the power off to the fan's low and high all together. If you follow the current path, it will dead end at 87a on relay 2.

oh ok I didn't see the ground switch, every thing looks good to me then

nolowis2low · 05-15-2008, 11:23 PM

Quote: Originally Posted by ZR2 MIKE

Thanks, but I have a 5.7 conversion and it runs hot. Thats a completely different situation that what you are running to keep a 2.8 cool. I just installed a Corvette radiator in the forward position (where the ac condenser normally goes) and installed the Ford Taurus fan in the normal puller configuration. Previously I was running dual 12" pushers and they were not cutting it in the summer when the ac was running in traffic. I upgraded to the AD244 HO alternator as well to handle the efan current draw. I don't want manual switches to HAVE to turn the fans on and off, I want it to work automatically as much as possible like it was factory. Running the efans on all the time is kinda crude and is a lot more wear and tear on the fan motors. You don't need fans to run if your thermostat has not opened yet (unless your AC on on). Or when cruising at 75mph on the interstate. I currently have the Taurus efan running on low speed through a temp probe controller and a 30A relay. It is working flawlessly right now. But it isn't summer and AC time yet. On low, the Taurus efan is moving more air than my 12" dual efans ever did. I can put my hand near the grille and feel the air draw nicely.

well that makes a lot of since now that i know this, and the manual switch isnt to bad if its cold enough i jsut wont turn it on untill it gets warm, and i dont use my AC. I also didnt want to spend the extra 60 bucks for the automatic switch. Also good info to know cause i know some one that is wantin my fans to use on a 5.0 swap and i dotn know if they would even be good enough. but them 2 fans are way more than enough for my lil POS 2.8

But other than that i know a lil bit about wiring and it looks good the way you got em drawn up.

ZR2 MIKE · 05-15-2008, 11:50 PM

Cool. Thanks Man!

I'm very warm blooded and I would melt with my AC. Truth.

For any V8 swap, I'd recommend doing the Taurus eFan/Corvette Radiator mod first. That way you don't have issues later down the road. My experience and 2 cents advice

ZR2 MIKE · 05-16-2008, 02:10 AM

melt with out my AC (I meant to say)

Yogi · 05-16-2008, 12:33 PM

Nice work, Mike!

nolowis2low · 05-16-2008, 04:45 PM

yea i dont know how much room you have but this guy i know has almost no room to put any kind of fan on the inside, thats why hes wanntin to use mine as pushers.

Yogi · 05-16-2008, 06:05 PM

Quote: Originally Posted by nolowis2low

yea i dont know how much room you have but this guy i know has almost no room to put any kind of fan on the inside, thats why hes wanntin to use mine as pushers.

Just reverse the polarity and you can use any fan as a pusher. The blade design might be more efficient as a puller, but it will work as a pusher too.

nolowis2low · 05-17-2008, 08:27 AM

Quote: Originally Posted by Yogi

Just reverse the polarity and you can use any fan as a pusher. The blade design might be more efficient as a puller, but it will work as a pusher too.

yea we know how to get it to push, iam just wonderin if he is having space issues like we are?

Dr.Fiero · 05-17-2008, 01:18 PM

Two suggestions:
1) Put some caps across the relay contacts to lower the pitting/burning.
2) Swap the wiring around a touch so you have power to the relays, and your thermal probe grounds (vs. sending power) the relays. It all works the same way in the end, but then you have much shorter runs of live wires laying around. It's a safety thing. I work with high voltage stuff (generators) and look for that kind of thing every day.

Yogi · 05-17-2008, 03:37 PM

What size caps?

Dr.Fiero · 05-18-2008, 02:02 AM

Not really critical - anything you've got laying around - maybe a 1uf or so mylar. It's really optional - might just make the relays live a bit longer that's all.

ZR2 MIKE · 05-18-2008, 12:08 PM

Thanks for the suggestions. I think I'll be alright without the caps but it is a good idea.

I see what you are saying about switching the wiring around. Would be more close grounds and then run one hot wire to a switch in the dash for the "kill switch" and then to a switched 12V source in the cab? Would have to re-route the AC wire. I don't know. Not really complicated the way it is and easy for a layman to follow it. I'll sit down with it and look at it some more. But you're right, it'll work the same the way it is.

ZR2 MIKE · 05-18-2008, 12:14 PM

Question for you guys -
On another forum a guy suggested I also put diodes in between each temp probe and the relays to prevent AC line voltage and the optional fan high override voltage from blowing fuses. I told him it was not necessary because the current flows from positive to ground, not back into positive (itself). I don't see how that would be an issue with DC current. Just making sure my thinking is not off here now. Not necessary, correct?

05-08-2008, 06:38 PM	#1
ZR2 MIKE Registered User Age: 40 Join Date: Jan 2007 Posts: 49 Location: Belleville, IL User is: OffLine	Taurus eFan wiring diagram help please I looked at many wiring diagrams for the Ford Taurus Dual Speed eFan and really want to do the most cost effective and simple solution with out having to use manual switches or expensive controllers. I took what I liked from different diagrams and made up my own. I'm not an electrical engineer though, so I need some input from those who know their stuff if my diagram is up to snuff. And if not, what should I do to improve it. Thanks
	[Reply w/Quote]

05-08-2008, 07:47 PM	#2
ZR2 MIKE Registered User Age: 40 Join Date: Jan 2007 Posts: 49 Location: Belleville, IL User is: OffLine	Re: Taurus eFan wiring diagram help please Looks like I need to put a Diode on the AC line. Forgot about that.
	[Reply w/Quote]

05-09-2008, 07:30 PM	#3
ZR2 MIKE Registered User Age: 40 Join Date: Jan 2007 Posts: 49 Location: Belleville, IL User is: OffLine	Re: Taurus eFan wiring diagram help please No one ? ? ?
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05-09-2008, 07:31 PM	#4
ZR2 MIKE Registered User Age: 40 Join Date: Jan 2007 Posts: 49 Location: Belleville, IL User is: OffLine	Re: Taurus eFan wiring diagram help please Here's a revised version . . . -
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05-09-2008, 08:18 PM	#5
Blazin_Jason Registered User Age: 26 Join Date: Mar 2007 Posts: 495 Location: BC, Canada User is: OffLine	Re: Taurus eFan wiring diagram help please Looks like it will work. I will be doing something similar when I finish mine.
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05-12-2008, 06:20 PM	#6
ssz28man Registered User Age: 28 Join Date: Feb 2008 Posts: 266 Location: durham, nc User is: OffLine	Re: Taurus eFan wiring diagram help please the way you have it set up, when your manual switch or a/c is on the fan will still only come on when the temp prob tells it to. some where in the 4.3 section is a thread that has a similar diagram but works exactly how you were trying to make this one work, don't remember which thread it was though
	[Reply w/Quote]

05-15-2008, 03:03 AM	#8
ZR2 MIKE Registered User Age: 40 Join Date: Jan 2007 Posts: 49 Location: Belleville, IL User is: OffLine	Re: Taurus eFan wiring diagram help please Quote: Originally Posted by ssz28man see what you think of this, I changed your diagram so that when the truck isn't hot enough to turn the fan on the a/c will still turn it on and get enough air flow to work I see what you are saying. Thanks man!
	[Reply w/Quote]

05-15-2008, 01:58 PM	#9
ZR2 MIKE Registered User Age: 40 Join Date: Jan 2007 Posts: 49 Location: Belleville, IL User is: OffLine	Re: Taurus eFan wiring diagram help please How's this look? I took your advice with the diagram mods you showed ssz28man. I like what you did. I also made a few other mods as per some suggestions on another forum. I would like to think is my diagram's final version. I do have the AC wire on the low side on purpose. I want the AC to run the fan on high only when the radiator gets hotter. The low speed should be more than enough to provide air flow through the ac condenser. And when temps climb, the high speed will automatically kick in. I know it involves a 2nd heat probe but I already have 1 so won't be a big deal to pick up a second one. You will notice optional override switches I included specifically for the 4x4 guys hitting the trails. Last edited by ZR2 MIKE : 05-15-2008 at 02:00 PM.
	[Reply w/Quote]

05-15-2008, 03:07 PM	#10
Mikz86TA Registered User Age: 34 Join Date: Jan 2007 Posts: 803 Location: Tallahassee, Florida User is: OffLine	Re: Taurus eFan wiring diagram help please Yeah. basically you need the fan on while the AC is on....even if the operating temp is not high enough yet. Air needs to be drawn across the condenser. I have mine setup a bit differently. I use a relay to the hispeed side which is triggered off of the adjustable temperature probe and also is ignition-based. I use a seperate relay to the lowspeed side which is triggered off of the AC wire. Still used a diode for safety.
	[Reply w/Quote]

05-15-2008, 04:21 PM	#11
ssz28man Registered User Age: 28 Join Date: Feb 2008 Posts: 266 Location: durham, nc User is: OffLine	Re: Taurus eFan wiring diagram help please that looks like it'll work, might want to put an off override switch in too for the 4x4s so they can keep the fan off completely if their going through mud. don't wanna suck the fan into the rad
	[Reply w/Quote]

05-15-2008, 04:40 PM	#12
ZR2 MIKE Registered User Age: 40 Join Date: Jan 2007 Posts: 49 Location: Belleville, IL User is: OffLine	Re: Taurus eFan wiring diagram help please Quote: Originally Posted by ssz28man that looks like it'll work, might want to put an off override switch in too for the 4x4s so they can keep the fan off completely if their going through mud. don't wanna suck the fan into the rad Thanks. I think it will work good for my needs. And I did include a fan off switch like you suggested, see the right side of the last diagram on the diagram ground circuit, there is a "Optional Override Switch Fan Off" switch . This switch would interrupt the ground circuit for both relays, forcing the power off to the fan's low and high all together. If you follow the current path, it will dead end at 87a on relay 2. Last edited by ZR2 MIKE : 05-15-2008 at 04:44 PM.
	[Reply w/Quote]

05-15-2008, 04:47 PM	#13
nolowis2low Registered User Join Date: Apr 2008 Posts: 504 Location: Shreveport User is: OffLine	Re: Taurus eFan wiring diagram help please just make it simple and wire regular fans into a relay and manual switch or to run all the time, i have 2 10in and they cool just fine and have no problems with the amp draw.
	[Reply w/Quote]

05-15-2008, 05:30 PM	#14
ZR2 MIKE Registered User Age: 40 Join Date: Jan 2007 Posts: 49 Location: Belleville, IL User is: OffLine	Re: Taurus eFan wiring diagram help please Quote: Originally Posted by nolowis2low just make it simple and wire regular fans into a relay and manual switch or to run all the time, i have 2 10in and they cool just fine and have no problems with the amp draw. Thanks, but I have a 5.7 conversion and it runs hot. Thats a completely different situation that what you are running to keep a 2.8 cool. I just installed a Corvette radiator in the forward position (where the ac condenser normally goes) and installed the Ford Taurus fan in the normal puller configuration. Previously I was running dual 12" pushers and they were not cutting it in the summer when the ac was running in traffic. I upgraded to the AD244 HO alternator as well to handle the efan current draw. I don't want manual switches to HAVE to turn the fans on and off, I want it to work automatically as much as possible like it was factory. Running the efans on all the time is kinda crude and is a lot more wear and tear on the fan motors. You don't need fans to run if your thermostat has not opened yet (unless your AC on on). Or when cruising at 75mph on the interstate. I currently have the Taurus efan running on low speed through a temp probe controller and a 30A relay. It is working flawlessly right now. But it isn't summer and AC time yet. On low, the Taurus efan is moving more air than my 12" dual efans ever did. I can put my hand near the grille and feel the air draw nicely. Last edited by ZR2 MIKE : 05-15-2008 at 06:00 PM.
	[Reply w/Quote]

05-15-2008, 08:20 PM	#15
ssz28man Registered User Age: 28 Join Date: Feb 2008 Posts: 266 Location: durham, nc User is: OffLine	Re: Taurus eFan wiring diagram help please Quote: Originally Posted by ZR2 MIKE Thanks. I think it will work good for my needs. And I did include a fan off switch like you suggested, see the right side of the last diagram on the diagram ground circuit, there is a "Optional Override Switch Fan Off" switch . This switch would interrupt the ground circuit for both relays, forcing the power off to the fan's low and high all together. If you follow the current path, it will dead end at 87a on relay 2. oh ok I didn't see the ground switch, every thing looks good to me then
	[Reply w/Quote]

05-15-2008, 11:23 PM	#16
nolowis2low Registered User Join Date: Apr 2008 Posts: 504 Location: Shreveport User is: OffLine	Re: Taurus eFan wiring diagram help please Quote: Originally Posted by ZR2 MIKE Thanks, but I have a 5.7 conversion and it runs hot. Thats a completely different situation that what you are running to keep a 2.8 cool. I just installed a Corvette radiator in the forward position (where the ac condenser normally goes) and installed the Ford Taurus fan in the normal puller configuration. Previously I was running dual 12" pushers and they were not cutting it in the summer when the ac was running in traffic. I upgraded to the AD244 HO alternator as well to handle the efan current draw. I don't want manual switches to HAVE to turn the fans on and off, I want it to work automatically as much as possible like it was factory. Running the efans on all the time is kinda crude and is a lot more wear and tear on the fan motors. You don't need fans to run if your thermostat has not opened yet (unless your AC on on). Or when cruising at 75mph on the interstate. I currently have the Taurus efan running on low speed through a temp probe controller and a 30A relay. It is working flawlessly right now. But it isn't summer and AC time yet. On low, the Taurus efan is moving more air than my 12" dual efans ever did. I can put my hand near the grille and feel the air draw nicely. well that makes a lot of since now that i know this, and the manual switch isnt to bad if its cold enough i jsut wont turn it on untill it gets warm, and i dont use my AC. I also didnt want to spend the extra 60 bucks for the automatic switch. Also good info to know cause i know some one that is wantin my fans to use on a 5.0 swap and i dotn know if they would even be good enough. but them 2 fans are way more than enough for my lil POS 2.8 But other than that i know a lil bit about wiring and it looks good the way you got em drawn up.
	[Reply w/Quote]

05-15-2008, 11:50 PM	#17
ZR2 MIKE Registered User Age: 40 Join Date: Jan 2007 Posts: 49 Location: Belleville, IL User is: OffLine	Re: Taurus eFan wiring diagram help please Cool. Thanks Man! I'm very warm blooded and I would melt with my AC. Truth. For any V8 swap, I'd recommend doing the Taurus eFan/Corvette Radiator mod first. That way you don't have issues later down the road. My experience and 2 cents advice
	[Reply w/Quote]

05-16-2008, 02:10 AM	#18
ZR2 MIKE Registered User Age: 40 Join Date: Jan 2007 Posts: 49 Location: Belleville, IL User is: OffLine	Re: Taurus eFan wiring diagram help please melt with out my AC (I meant to say)
	[Reply w/Quote]

05-16-2008, 12:33 PM	#19
Yogi Registered (Ab) User Join Date: Feb 2008 Posts: 4,093 Location: League City, TX (Houston) User is: OffLine	Re: Taurus eFan wiring diagram help please Nice work, Mike!
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05-16-2008, 04:45 PM	#20
nolowis2low Registered User Join Date: Apr 2008 Posts: 504 Location: Shreveport User is: OffLine	Re: Taurus eFan wiring diagram help please yea i dont know how much room you have but this guy i know has almost no room to put any kind of fan on the inside, thats why hes wanntin to use mine as pushers.
	[Reply w/Quote]

05-16-2008, 06:05 PM	#21
Yogi Registered (Ab) User Join Date: Feb 2008 Posts: 4,093 Location: League City, TX (Houston) User is: OffLine	Re: Taurus eFan wiring diagram help please Quote: Originally Posted by nolowis2low yea i dont know how much room you have but this guy i know has almost no room to put any kind of fan on the inside, thats why hes wanntin to use mine as pushers. Just reverse the polarity and you can use any fan as a pusher. The blade design might be more efficient as a puller, but it will work as a pusher too.
	[Reply w/Quote]

05-17-2008, 08:27 AM	#22
nolowis2low Registered User Join Date: Apr 2008 Posts: 504 Location: Shreveport User is: OffLine	Re: Taurus eFan wiring diagram help please Quote: Originally Posted by Yogi Just reverse the polarity and you can use any fan as a pusher. The blade design might be more efficient as a puller, but it will work as a pusher too. yea we know how to get it to push, iam just wonderin if he is having space issues like we are?
	[Reply w/Quote]

05-17-2008, 01:18 PM	#23
Dr.Fiero Registered User Age: 43 Join Date: Oct 2003 Posts: 429 Location: Delta, BC User is: OffLine	Re: Taurus eFan wiring diagram help please Two suggestions: 1) Put some caps across the relay contacts to lower the pitting/burning. 2) Swap the wiring around a touch so you have power to the relays, and your thermal probe grounds (vs. sending power) the relays. It all works the same way in the end, but then you have much shorter runs of live wires laying around. It's a safety thing. I work with high voltage stuff (generators) and look for that kind of thing every day.
	[Reply w/Quote]

05-17-2008, 03:37 PM	#24
Yogi Registered (Ab) User Join Date: Feb 2008 Posts: 4,093 Location: League City, TX (Houston) User is: OffLine	Re: Taurus eFan wiring diagram help please What size caps?
	[Reply w/Quote]

05-18-2008, 02:02 AM	#25
Dr.Fiero Registered User Age: 43 Join Date: Oct 2003 Posts: 429 Location: Delta, BC User is: OffLine	Re: Taurus eFan wiring diagram help please Not really critical - anything you've got laying around - maybe a 1uf or so mylar. It's really optional - might just make the relays live a bit longer that's all.
	[Reply w/Quote]

05-18-2008, 12:08 PM	#26
ZR2 MIKE Registered User Age: 40 Join Date: Jan 2007 Posts: 49 Location: Belleville, IL User is: OffLine	Re: Taurus eFan wiring diagram help please Thanks for the suggestions. I think I'll be alright without the caps but it is a good idea. I see what you are saying about switching the wiring around. Would be more close grounds and then run one hot wire to a switch in the dash for the "kill switch" and then to a switched 12V source in the cab? Would have to re-route the AC wire. I don't know. Not really complicated the way it is and easy for a layman to follow it. I'll sit down with it and look at it some more. But you're right, it'll work the same the way it is.
	[Reply w/Quote]

05-18-2008, 12:14 PM	#27
ZR2 MIKE Registered User Age: 40 Join Date: Jan 2007 Posts: 49 Location: Belleville, IL User is: OffLine	Re: Taurus eFan wiring diagram help please Question for you guys - On another forum a guy suggested I also put diodes in between each temp probe and the relays to prevent AC line voltage and the optional fan high override voltage from blowing fuses. I told him it was not necessary because the current flows from positive to ground, not back into positive (itself). I don't see how that would be an issue with DC current. Just making sure my thinking is not off here now. Not necessary, correct?
	[Reply w/Quote]