Well, here goes...I just completed the install of my Mark VIII fan in my 2000 Durango, 5.9 4X4. I was able to keep the original fan shroud/coolant tank/washer tank. I trimmed 1/2 inch from the fan to bring it closer to the radiator, this allowed the fan shroud to fit perfectly. I did flip the radiator support around to give just a bit more clearance and to hold the new fan in place, with no other brackets ( this thing is NOT moving...) I built a small panel to house the 3 relays and thermostat control that I used to control the fan. I tapped into the fuse box under the hood for my main power and used the Normally Open contact on the A/C relay for the on/off power for the slow speed, ..... I wired it up to have the slow speed come on with the A/C and the high speed set to come on at 205 degF as determined by the thermostat probe (inserted in the radiator at the INLET of the radiator). It took a few tries to get it dialed in, but works great now. I used good quality wire and soldered/shrink wrapped all connections. I ended up cutting all 4 tabs off the fan. I will eventually wire in a manual overide for fast speed..JUST IN CASE.... I currently have a 195 degF thermostat installed and the only time this thing gets above that is when I sit still in traffic and when the fan kicks on, it takes about 45-60 seconds to get down to normal. This fan really moves some air...with the door open, i can feel the wind blowing under the truck if I put my hand below the truck. I took plenty of pics. I really like the way it turned out. The D really feels stronger/quicker and seems to rev a little quicker now. Only thing is my gas milage seems to have gone DOWN instead of UP.
Notes about the install/lessons learned:
Test your fan first... After all this work, I never tested the fan. My slow speed is burned out...doesn't work. I have ordered a new fan and will not make the same mistake again.
Do NOT use your Durango's radio as your entertainment when doing this job if it covers 5 days as mine did..(had to work 12 hour shifts all week) as it completely killed it...now I have a brand new battery to show for it.
Don't rent broken tools from Autozone at 10pm and expect to use them that night...(while I had to front end apart, I replaced the water pump and power steering pump..both replacements were needed and waiting for the fan to go in.)

I may have missed a few details, any questions about my install...just ask, I will post answers if there are any questions.

 

Do you have a diagram and a parts list available? I may just go ahead and make a new controller out of scratch. I had a buddy of mine also tell me about a controller he picked up from some guy online who makes them. He uses a potetiometer for the fan speed and it fan never shuts off but when it is not needed it pulls minimal amps and it goes to max speed automatically when the AC is switched on. This is one thing I would love to have since it keeps voltage drop to a minimum. This setup cost him about $105.

 

This is the diagram I used, I drew it from memory of the one that I was asking for in a previous posting... I used the paint program on the computer so its not perfect, but I think it works.
Parts list: 3 30/40 amp relays w/bases *includes snap in connectors/wire ends, spool of 10 gauge wire, spool of 18 gauge wire, soldering iron and solder, 1 adjustable thermostat w/ probe, 1 60amp fuse and holder, and of course...the fan.

 

That fuse is way too big dude I would definitely bring that down to a 25 or you'll fry a relay if there's ever an issue. I circled a relay in your pic. Is this spliced into the ignition?

 

Your right, I put a 30 amp fuse in there since I had one in the tool box. Also, the source in question is from a source that only comes on with the ignition. I used fuse taps and used a fuse in the fuse box inside the cab. I forgot to include them but I also installed indication lights which I installed in the dash panel. I used green for slow speed and amber for high speed. I simply took the positive from pin 87 on the respective relay and grounded the ground in the dash. So far so good...hope all this helps.

 

Mean green, if I rememeber, from previous posting, the Mark Fan pulls alot of amperage. So 30 amps may be minimum, knowing that, make sure these relays are at least rated for 40 amps. Relays should have a higher rating than the main fuse to keep the relays from frying. Never hurts to use a very heavy duty relay even for light load applications. But all in all, make sure you do your homework on finding out the power requirements from the electrical fan you will use before you go out and purchase what electrical parts you need.

Durango 360. I think your 12 volt source that Mean Green pointed out should be swapped around with your temp controlled 12 volt switch. Since the new website conversion, they lost my pdf wiring. I'll post it again.

Your switched 12 volt source should be the primary switch to turn on/off the fan entirely. From there, you will use the temp switch and the a/c switch to govern the speed of the fan afterwards.

To see my wiring diagram better, just download it and use windows picture and fax viewer so you can zoom in on the jpg. This diagram is easy to follow as it is color coded. Plus I have given a legend to this diagram to show you what and where those contact points are. However, I must have made a last minute change to my diagram so ignore the 16-18 gauge wiring and you can maintain the 10-12 gauge wiring thru out the diagram.

 

Kensai, my current controller (read as paperweight) has a 25 amp fuse with a 30 amp relay. I imagine this thing pulls around 20 amps. My instructor informed me that he has oscilloscopes at the school so I'm hoping to plug into my fan and see just how many amps are being pulled. I'll update you on that.

 

What's up gentlemen,
I had fan issues so I read all your posts and made the jump. I installed a Mark VIII fan with a Flexalite controller. I used the controller to take the headaches out of the install. I did the install in two days, but I started late on the first day or I could have done it in a day. I had the fan running for a minute or two and it blew my 30amp inline fuse. I'm gonna put a 40amp in it to see if it will hold. I am not sure what these lincoln fans actually pull, but its alot. I will update after I upgrade the fuse to let you know if it is all working. I was able to keep my stock shroud (with no altering) as well. I have a 5.9 Durango and a '99 5.9 R/T dakota. If this works on my Durango, I am going to do it to my R/T.....by the way.. thanks to all who write in these forums. All your info was a great help for me.

P.s....I was in a hurry on this install. If thise works and I do my R/T, I will take pictures of the whole process.

 

Indy says:

The Lincoln Mark VIII fan will draw continuous currents of 33A@12.0V & 42A@14.4V, and has a starting current in excess of 100A.

Man, this is insane to pull this amount of amperage with normal running conditions. 33-42amps is alot of amps. I wonder what it will do to our alternators when it temporarily jacks up to 100 amps for a short duration (startup)? This will be a strain on the alternator for the D owners that does not have the toll group package or heavy duty cooling package installed. Even those owners will put a strain on the alternator. I don't think our alternators have that much reserves to push out.

I rather go with the other aftermarket fan our fellow forum user that previous posted in this thread says will outdo the mark fan with much more CFM air flow and uses less than half of the amperage draw of what this mark fan pulls!

 

As harveye72 said, he has smoked his 30amp in seconds. I haven't installed mine yet and I am not an electrician. Perhaps there is a series or parallel setup that would work better and reduce the draw.

As for the alternator... I have the 160amp version for towing.

IndyDurango