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Transmission & Drive train

Brown Wire Mod


This is a discussion on Brown Wire Mod within the Transmission & Drive train forums, part of the Ford Expedition Forum category!
Register to remove these ads. It's free! So i was researching into disengaging the A4WD, and ran across this site. ...



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Old 05-16-2008, 06:32 PM   #1 (permalink)
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So i was researching into disengaging the A4WD, and ran across this site. http://www.explorer4x4.com/controltrac_mod.htm Its aimed towards explorers and I was curious if anyone knew if it would work for an expo, I imagine it would.
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Old 05-17-2008, 06:34 AM   #2 (permalink)
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It would be really nice to know if i can take my truck out of a4wd. This would help save on gas a little :)
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Old 05-17-2008, 11:12 AM   #3 (permalink)
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When I first signed up on this site, I remember someone posting a thread about cutting into the wires for the A4WD system to get it to disengage. But from reading that link, the author says that it won't add any added mpg just let's you decide rather than a computer to use only 2 wheels instead of all 4. But cool idea.
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Old 05-17-2008, 05:56 PM   #4 (permalink)
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I wanted to do it because its annoying turning the wheel at loc and it acting like its in 4wd, and also it might be a little more fun at the stop lights, haha.
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Old 05-17-2008, 10:24 PM   #5 (permalink)
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Def. I understand the want, just was saying I didn't know if it was worth the time to invest simply for the MPG gain.
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Old 05-18-2008, 06:47 PM   #6 (permalink)
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Guys it does work but please look at the wiring diagram. The brown wire is to me really kindamof light brown. If you go by the wiring diagram you can use process of elimination. There are only five or so wires so it is easy to identify the last wire. I cut the wrong one first, then I cut the right one. When I knew it was right I taped it up so no moisture would effect it. MPG change???? Not enough to notice. The sluggishness that you feal when you acclerate is gone. Now you can power brake if that would be what you are looking to do. In my case the lifted Expeditions experience vibrations which lead to transfer case failures. That is why I wanted to eliminate the 4AWD. Now it drives alot smoother, even when you are turning in the parking lot, no more front end drag. I like it and in my climate I will never use the 4AWD. The job was easy and BIG thanks to the forum for giving a good wiring diagram.
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Old 05-28-2008, 08:42 PM   #7 (permalink)
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It can be done. You just need to trace the wire from the transfer case and switch it. Or if you can't trace it run 2 wires to the transfer case and tap in down there. There is a brown wire the strays alone on the transfer case thats the magnetic clutch wire.
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Old 08-19-2008, 04:24 PM   #8 (permalink)
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So if I just cut the wire I will only have 2wd and not be able to use 4wd hi or low?
If I put a switch in line with the brown wire what do I have to do to get in 4wd hi?
Thanks
Pete
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Old 08-19-2008, 08:16 PM   #9 (permalink)
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If you cut the brown wire you'll permanetly disable A4WD. 2Hi, 4Hi, 4Low will all be active. A4WD uses a magnetic clutch to engage the front driveshaft where 4x4 uses mechanical means.


If you put a switch inline with the brown wire, you don't need to do anything but turn your dial to 4Hi to get into 4hi. Because its two different systems the brown wire only affects the A4WD aspect. They do it because some vehicles don't have the 2hi option on the dial.
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-Banks monster exhaust
-Recon smoked mirror signals
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-Soon headstuds and EGR delete

1999 Ford Expedition XLT 4.6L 2V *Sold*
-K&N FIPK cold air intake
-Gibson Headers
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-Superchips tune
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-Chrome grill guard
-LED tail lights
-Chrome billet grille

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Old 07-12-2010, 08:45 PM   #10 (permalink)
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so to rehash this topic since i am thinkin of doing this to my expy, i can cut the brown wire and my truck will be in 2wd but my selector switch will still work for 4h and 4l? just checkin cuz in the explorer forums, they say you will still be in awd...im not lookin for mpg. i didnt buy a full size suv and lift it for mpg. i just dont like awd. i enjoy running in 2wd sometimes when im offroading...makes it harder and you get better rooster tails!
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