Electric Fan Install Write up (Taurus, Mark VII) - Page 10 - JeepForum.com

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post #136 of 163 Old 06-09-2012, 06:52 AM
YJ43
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Thanks Que! Let me know when you're in Chicago next, I owe you a few beers!


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post #137 of 163 Old 07-07-2012, 02:29 PM
YJ43
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I seem to be having issues running this...I bought the $35 Hayden controller that has it's own built in relay...I had it just running through that on low speed for a little bit and it worked. Now I'm trying to wire in high-speed as well following the diagram on page 1. When I connect the controller similar to the diagram on page 1 to pin 86 on the low speed relay, I only get high speed...is this because I need to eliminate the extra low-speed relay that I've added and just use the one included in the controller? This probably isn't making sense, but this is the one I have:

http://www.haydenauto.com/New%20Prod...r/Content.aspx

The way that I have this set up is the orange wire going to pin 86 on another low speed relay and then the high speed wired up like the diagram on page 1...any thoughts as to what I'm doing wrong.

1995 YJ: 4.0L I-6 and AW-4 trans; CJ front clip; SOA front, 4-link in rear; 8.8 rear w/ Detroit locker; 4.56 gears; TJ front shafts; SYE; 1" Body lift; JB4x4 hi-steer; Ford Taurus fan; B&M Hi-Tek trans cooler; 35" Procomp MT on aluminum wheels
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post #138 of 163 Old 07-07-2012, 03:51 PM
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Figured it out...with that controller, you don't need another relay, just take the low speed wire to the ignition wire and then run the high speed on it's own higher amp relay to the wire on the high speed switch. I was trying to use another relay for the low speed, which isn't necessary (essentially 3 relays), if that makes any sense, lol.

1995 YJ: 4.0L I-6 and AW-4 trans; CJ front clip; SOA front, 4-link in rear; 8.8 rear w/ Detroit locker; 4.56 gears; TJ front shafts; SYE; 1" Body lift; JB4x4 hi-steer; Ford Taurus fan; B&M Hi-Tek trans cooler; 35" Procomp MT on aluminum wheels
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post #139 of 163 Old 07-07-2012, 08:06 PM Thread Starter
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That controller looks like it has a second relay for high speed. I'm glad you figured it out. When I did this back in 2007, there were no controllers like that.

.
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post #140 of 163 Old 07-08-2012, 06:35 AM
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With the low speed already turning the fan the high speed doesn't generate the 80 amps in rush so you just need to make sure the relay is rated for 40 amps. I still haven't needed to wire in the high speed on mine. The low speed moves enough air to cool it.
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post #141 of 163 Old 07-08-2012, 08:38 AM Thread Starter
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Originally Posted by Que89YJ View Post
With the low speed already turning the fan the high speed doesn't generate the 80 amps in rush so you just need to make sure the relay is rated for 40 amps. I still haven't needed to wire in the high speed on mine. The low speed moves enough air to cool it.
Yeah, I've only had to use high speed a couple of times. Only on a steep grade, fully loaded.

.
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Quote:
Originally Posted by Major Sanderson
You have no respect for excessive authority or obsolete traditions. You're dangerous and depraved, and you ought to be taken outside and shot!
Quote:
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Mr.B's post gets you as close to Buddha as you can get on JF...
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post #142 of 163 Old 09-03-2012, 04:09 PM
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can you just wire the fan straight to a toggle switch and cut it off and on with that? I looked through thred and didnt see anything that stood out.
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post #143 of 163 Old 09-03-2012, 04:41 PM
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No. It would seriously overload most switches

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post #144 of 163 Old 09-03-2012, 10:10 PM Thread Starter
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can you just wire the fan straight to a toggle switch and cut it off and on with that? I looked through thred and didnt see anything that stood out.
Like kjg26 said. You would at least have to run it through a relay also. But why would you want to do that? When I'm on the road, I have most of my attention on all those idiot drivers out there. When I'm on the trail, I'm looking at the next rock I'm going to climb. It only takes a few minutes of distraction, and you are overheating your engine. why would you want to risk that?

.
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Quote:
Originally Posted by Major Sanderson
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Quote:
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Quote:
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Mr.B's post gets you as close to Buddha as you can get on JF...
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post #145 of 163 Old 11-28-2012, 07:48 PM
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So, I'm sorry if this was expressed previously and I missed it but. I'm working on a little buggy type thing and if I wanted to set this up so so it just runs full time low with a on/off bypass. Could someone also give me the dimensions of the Taurus unit?
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post #146 of 163 Old 03-15-2013, 06:08 AM
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Has anyone done this Mod to a TJ/LJ 4.0?

What would be the disadvantages?

I see the advantage with water fording and what not.

Are there any other plusses to switching things out to an electric Fan on a 4.0?

Very good write up that looks easy to understand.

Best Regards,
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post #147 of 163 Old 03-15-2013, 06:32 AM
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Quote:
Originally Posted by OldManTurbo View Post
Has anyone done this Mod to a TJ/LJ 4.0?

What would be the disadvantages?

I see the advantage with water fording and what not.

Are there any other plusses to switching things out to an electric Fan on a 4.0?

Very good write up that looks easy to understand.
Consider usuing a volvo relay if you do this. Much simpler IMHO

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post #148 of 163 Old 03-15-2013, 06:42 AM
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Quote:
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Consider usuing a volvo relay if you do this. Much simpler IMHO
Good note to add to my list of info on this subject. Still not sure I want to do this as its pretty invasive. Im not finding a lot of TJ folks that have made this leap, but I'm not done looking around yet either.

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post #149 of 163 Old 08-26-2015, 03:23 PM
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Great write up. I just bought the electric fan and it will be going in tomorrow. Thanks a bunch
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post #150 of 163 Old 04-24-2016, 07:54 PM
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Hell . I've just got the fan and such and wired up the relays to makw them work. I've tried to use a diode but I hooked it up wrong and blew it up. How exactly did you hook up the diode and where? Shouldn't the high and low wires have a diode to stop the gererator effect while freewheeling? Do I need a diode to handle 40 amps? I can understand schematics but I'm not to familiar with electonics so please help me. Do the bosh relays have built in diodes? Thanks
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