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BWM Brown Wire Mod 3rd Gen

Discussion in 'Modified 2002 - 2005 Explorers' started by P. doggy, September 10, 2007.

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    1. Shaggy03Limited

      Shaggy03Limited New Member

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      but you would think since its not activating the front drive at all that just like any other 4wd you would get 5-10 mpg increase over driving around in 4wd..
       
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    3. Limited02

      Limited02 Well-Known Member

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      If a 2wd Explorer got on avg 5-10 mpg better than a 4x4, I would have converted mine to 2wd or would have bought a 2wd a long time ago. The difference in MPG between a 2wd and 4wd would be no more than 2mpg at best IMO.

      Secondly, when you are driving, the CV shafts and front driveshaft are still rotating, it's just free spooling at the transfer case. That's why the BWM will have zero effect on mpg. Make sense?

      Lastly, while I agree that getting the best mpg possible is always nice, I knew when I bought my Explorer that getting great mpg was the least of my concerns.
       
    4. wheelin'explorer

      wheelin'explorer Active Member

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      I did this MOD today, and it works perfect without a relay. I really doubt there is much going through this wire, nor do I think it will burn up. the wiring for it is not a big guage to start with. ill argue to the fact there is no risk of burning your Ex with a decent switch and same size wire.
       
    5. cxan

      cxan New Member

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      Can I do this mod with my '04 AWD? I'm gonna guess I can't, but it doesn't hurt to ask.. lol
       
    6. College Student

      College Student Well-Known Member

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      You cannot as your vehicle is running in 4wd all the time hence the All Wheel Drive name.
       
    7. JCUZ

      JCUZ Well-Known Member

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      I did mine on the weekend just gone, and once again didn't use a relay since it only has less than 10A going through the switch.

      I wired in a light again, and when the switch is on, the light "just" lights up (pretty faint, but it is on). When I start the truck and then switch to 4X4 High, the light comes on properly. Also comes fully on if 4X4 low is selected (car in neutral, foot on brake).

      When in 4X4 Auto, I can now tell hen 4WD is engaging by looking at the light (as well as "feeling" it engage - especially at low speed doing sharp turns) - ie when taking off quick in the wet, or when travelling at speed over loose gravel.

      With switch off, light is also off, and only 2WD is possible.
       
    8. SUL73NAZ

      SUL73NAZ Active Member

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      I need to do this mod but I am so lazy... lol I feel like paying someone else to do it!
       
    9. ronelee

      ronelee New Member

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      picture aren't valid try updating them please!!! thank you!
       
    10. Maniak

      Maniak Moderator-Stock 91-94 Staff Member Moderator Elite Explorer

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      The OP hasn't been on the forum in 5 years. I doubt he will update the pics.


      If you do the mod, take pics and post 'em. I'm sure it will help people in the future.

      ~Mark
       
    11. JCUZ

      JCUZ Well-Known Member

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    12. Rick

      Rick Pumpkin Pilot Staff Member Admin Elite Explorer

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      In going through our list of useful threads I found that all of the photos in the first post are gone.

      If you have photos to replace these please let me know.

      Thanks!!
       
    13. Rick

      Rick Pumpkin Pilot Staff Member Admin Elite Explorer

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      '

      Guess this didn't work :(
       
    14. chetrick87

      chetrick87 Active Member

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      hey good writeup and I am interested in attempting this mod. is there anyway to retrieve the pictures?
       
    15. Explorer0204

      Explorer0204 Active Member

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      I did the mod a few months ago. Works fine and haven't hurt my truck in any way so I am pleased that I have the option. All I did was interrupt the wire with a switch. No relay or anything like that. Works perfect.
       
    16. D Hook

      D Hook Elite Explorer

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      Where did you end up putting the switch?
       
    17. Explorer0204

      Explorer0204 Active Member

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      MAJOR UPDATE!!!!

      I was driving around on the lake and we found an plowed section of ice that the guy plowing said we could drift on. At one point I accidentally had it is 2x4 when I thought it was in 4x4 and I spun the living crap out the the rear tires. I got suspicious of why I wasn't going anywhere so I looked over and realized I wasn't in 4x4. That being said it seems I haven't done any damage to it. Honestly especially after this, I feel like even if it did go bad it wouldn't be cause of it being run in 4x4. I feel like it is a "safety" feature that was done after the rollover years but....I don't really know for sure so I am still not going to push it.
       
    18. Number4

      Number4 "I'm counting to 3, then I'm getting your dad." Elite Explorer

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      Sure would be nice if a Moderator would clean up the unnecessary posts. Lot's of good stuff in here, but not 24 pages worth. Just say'n, if it's gonna be a sticky, it should be a little cleaner. I understand it is time consuming.
      People keep doing this mod and no one is posting pics? What gives?
       
      Last edited: February 12, 2014
    19. Number4

      Number4 "I'm counting to 3, then I'm getting your dad." Elite Explorer

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      2004 Explorer/Mountaineer Wiring Diagrams
      Electronic Shift Control

      [​IMG]

      [​IMG]
       
    20. tonyi320

      tonyi320 New Member

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      Disregard this message, can't delete messages apparently. Finally got the hang of this forum stuff I think hah. Ive never been in one before...
       
      Last edited: March 30, 2014
    21. tonyi320

      tonyi320 New Member

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      Explorer0204 how many amps is your switch?
       
    22. tonyi320

      tonyi320 New Member

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      Thanks p doggy for the original info man btw!
       
      Last edited: March 30, 2014
    23. JCUZ

      JCUZ Well-Known Member

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      A 10 Amp switch is all you need - mine is a 10Amp and have had it in since last year, and we keep it mostly on (since I prefer to have it in Auto 4WD mode anyway, which means it runs 2WD except when it detects slippage then it diverts power to the front).
       
    24. tonyi320

      tonyi320 New Member

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      Cool man thanks
       
    25. fordfan401

      fordfan401 New Member

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      Anyone know what size (AWG) the brown wire is?
       
    26. Number4

      Number4 "I'm counting to 3, then I'm getting your dad." Elite Explorer

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      In my first pic above, lower left hand corner, second wire from left, is the only solid brown wire I can see. It is the positive supply to the transfer case and is 16 awg.
       

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