2 Speed Taurus fan in a TJ

[Errinjan]

Has anyone done this Mod?

[Jim]

I have been considering it (with some research) for the YJ as the mechanical fan is LOUD when up a few RPM's. the topic was brought up here perhaps a month ago. Alternatively, JeepForum.com has many write-ups (some good, some not so good).

Holler if you have Q's if I might answer for you.

[Errinjan]

I have a E-Fan now, it's dying on me I think. I thought about going back to mechanical.

[Errinjan]

I have a 2 speed relay w/ temp sensor, my concern is- it is not set up to shut the lower speed off when the higher speed is actuated. I've had it several years (this is actually the 2nd Taurus fan I've had-the first one was misplaced in 22,000ft hog barn back in KC)

[Errinjan]

Me to, my buddy and his 2 brothers rent it for $300 a month. It is a awesome place. They are a bunch of Pontiac nuts from their father on down. My TJ spent about 18 months there several years ago.

[Jim]

Errinjan previously posted:

[Hypoid]

Errinjan previously posted:

[xaza]

A double pole double throw relay would have a set of normally open and a set of normally closed contacts. You connect the low speed to the normally closed contact and it will run on low when the relay is not energized. Connect high to the normally open contacts and then when relay energizes it will take power away from low and apply it to the high. The temp sensor then needs to close on a rise in temperature and be wired to the coil contacts on relay to create switchover. As for power supply to relay it should be through ignition to prevent fan from running constant. So one relay will work great if wired correctly. Not too sure the effects of powering both speeds at same time but I will ask some of the more seasoned techs at work today.

[Hypoid]

xaza previously posted:

[Hypoid]

Jim Williamson previously posted:

[Hypoid]

There were a couple links that had some good ideas for adapting the two speed fans, and fan controllers in general, if you are into building your own.

I think this site has a simulator, but my browser is not up to using it: CircuitLab - Taurus 2-Speed Fan Control

Freewheeling diode? Interesting: Ford Taurus 2-Speed Fan Install « Bob's Garage Library#

The tenth post, by digitalsolo has a diagram for adapting the dual-wound motor to the GM PCM: Two speed Taurus fan wiring (GM PCM)

If you are that handy, build your own damn controller, like Tim65GT did in post 12: Taurus Fan Wiring Problem | Mustang Forums at StangNet

[Errinjan]

Well I've spent the last two days under, on and around my jeep. First day was changing rear seal in the Transfer Case and installing a newly built D/S from Bill's Englewood. (that shaft eliminated vibration issues that I've been plagued with forever) I can't tell you how much better this thing drives especially at highway speeds.
Yesterday was fan day. Pulled the old E-Fan out leaving the existing controller. After pulling the radiator I did a little trimming in the fan shroud (very little), added a few mounting tabs. The fan itself I had to take the 3 mounting screws out, turn the motor out of the way. Then grind flush the the bolt hole that extended 3/8's of an inch above the back of the housing. Even with that lowering I had to take my grinder to the back of the Fan Motor housing-basically grinding 2 of the vents and lowering the edge about 1/8". This gave the fan motor clearance from the old fan hub. I mounted the fan has high as I could on the radiator. Hoping to get more airflow over the winch.

Now the wiring, thanks for the diagram. I've seen a few controllers (few on ebay that look awesome but pricey) I have a 2 speed controller that I got (not sure when or where) it has 2 40 amp relays in it. I'm leaning to going with 3 (2 40's, 1 70) It appears this is work I can do myself. Where can I get the parts?

[Errinjan]

Correction- My 2 speed controller is a 2 FAN controller that each fan has a HIGH/Low setting. It's only running 40 amp relays (ok for low, not enough for high)

[Hypoid]

I would think, most any auto parts would have high-amp relays.

[Errinjan]

Thanks I have a old (new) ford solenoid for another issue. I've read that will work on the high speed side.
I'm not sure but I may be having a issue with the single speed controller I now use. It may me cutting off the fan at 240 (it seems I hit 240 then instantly I go to 260 (in the red) At this point my fan runs from startup. I think I'll put a on/off switch the on low speed and have a separate switch (or a on-off-on) to turn on High speed when I need it. I'll look for a complete control system later (make sure this JY fan makes it through the summer

[Errinjan]

Auto parts store generally stop a 40 amps. I figure a car stereo place or electronics store should have one. For now I'll just us the ford solenoid and run the fan speeds manually. I've wired in a on-off-on dash switch that tested out ok on the low speed today. Tomorrow I need a few parts to finish up the High speed side. The Taurus fan is doing a better job than the old ebay fan. But the Jeep still warms up on long inclines. I'm sure a better radiator would help but hopefully the high speed fan will take care of my problem for now. Thanks for your help

[Hypoid]

I think that once you get the airflow problem solved, your Jeep will run much cooler.

[Errinjan]

Exactly, airflow. Mounting a big winch up front didn't help matters at all. With out it I may have been just fine on low speed. Several weeks ago in an effort to improve airflow I fabbed in plastic skirts along each side of the radiator inside the grill. (I think this is a stock setup that we neglected to put back in when I had to replace the front end) My main concern will be the durability of the Junk Yard fan.