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4X4 High Light Flashing

Discussion in 'Stock 2002 - 2005 Explorers' started by Magnatek, December 17, 2011.

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    1. Magnatek

      Magnatek New Member

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      I am working on my girlfriends 2003 Explorer XLT. We replaced the transmission and on the test drive after the re-install the 4X4 High light in the dash flashes about 5-10 times every couple of minutes. The buttons on the dash (4X4 auto & high) don't do anything when pressed and the 4X4 low button just flashes 10 times or so when you press it. So, no 4 wheel drive.

      We did disconnect the battery cable during the process and I am wondering if that blew the module behind the glove box? I searched the forums and it seems that it may be the cause. Can anyone verify this, or have any other ideas? Thanks for your time.
       
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    3. BigRondo

      BigRondo USMC 1371 Staff Member Moderator Elite Explorer

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      Welcome aboard!! :salute:

      It's hard to say what the issue is. The only way I know to know for sure what the problem is, besides throwing parts at it until it is fixed, is to get the codes read at the dealer.

      I recommend checking all the connections on the the transfer case motor. When my 4x4 lights were flashing, and I had no 4x4, it turned out to be a bad ground on the transfer case motor. I replaced the 4x4 control module and the switch before the bad ground was discovered.

      Good luck with the fix and be sure to keep us posted.
       
    4. Magnatek

      Magnatek New Member

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      Thanks for the reply. We test drove it right away after the re-install and that's when the problem developed. We put it back on the lift right away and found the ground wire you are talking about corroded and broken. I soldered on a new connector and hooked it back up. The problem was still there. After about 1 day, it stopped flashing and the button (4X4 high) started working, at least the light on the dash came on when the button was pressed. I tried to get it into low but nothing worked. I assume this means at least the high is working? When you press the 4X4 auto button, the high light goes off in the dash. Does that sound correct?
       
    5. jaydez

      jaydez Active Member

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      Did you put the transmission in neutral, set the parking brake and press and hold the 4x4 low button?
       
    6. szeiger

      szeiger New Member

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      I know the threads are a little old but: Had the same problem with the 9 flashes, did the module swap, negative lead off the battery, etc. and it turned out, as some had post, a bad negative cable. But, this one comes out of the harness and grounds to the transfer case, not from the transfer case to the frame.
      I would not have seen it except I decide to remove the transfer case shift motor to bench test it/clean it up. Saw it, spliced it, replace the motor, grounded the spliced cable and back in business.
       

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