4x4 not working fix
i had the same problem.I found pages of info on this site.here is the link that I hope will take you to the thread.
http://www.explorerforum.com/forums/showthread.php?t=163694&highlight=4+wheel+drive+problems&page=2
TRY THIS FIRST:
I did the battery reset. Just like others have posted. Remove the POS cable to your battery. Then, put key in ignition and turn. I did it BOTH ways, since I wasn't sure if you should just TURN and STOP just BEFORE you would "start" car, or if you should turn ALL THE WAY, as if you were going to start the car. Anyway, did it BOTH ways. Went back inside to warm up coffee and grab a piece of toast. Went back out after 5 mins, reconnected the POS cable to battery and then went to start car. BE ADVISED. At first, I didn't think it worked because the "4x4Hi" dash light didn't light up, just the "4x4Lo". However, when you actually go all the way and START the vehicle, I actually saw the "4x4Hi" dash light come one, and when I pushed the 4x4Hi button, I heard the clicking and voila, the "4x4Hi" dash light stayed on. So, I "guess" I have 4x4Hi now? LOL. We're supposed to get more snow in the next few days. Will let you know, but I'm pretty sure, from hearing the clicking both inside AND outside the vehicle, the 4x4 was engaging. Good Luck to all !
If that didn't work:
The 4x4 Control module (CM) is a little black box located behind the glove box ~4" x 5 1/4" in dimension.. It has two electronic harness connections. To remove glove box, pull the sides in to let it open entirely. locate the black box, and remove 1 bolt from the underside of the black box, it then swings out and you can remove the (2 screws holding on silver bracket to the relay), disconnect the harnesses and replace accordingly.0000
DON'T LET ANYONE TELL YOU YO HAVE TO PAY TO HAVE IT PROGRAMMED just order it with your VIN # and install it.
If this doesn't work heres the fix:It is a relay called a 4x4 control modual it is located in the dash above your glove box.You open the glove box push inward on both sides so that the glove box will hinge down towads the floor.You will then be able to see up into the dashboard.There will be a big black square relay with 2 wire connections going to it .that s what needs to be replaced.they have to ordered from a ford dealer(not autozone/pepboys)
YOU HAVE TO GIVE THEM THE VIN # for your truck because its truck specific.
The link I sent has instructions with pictures its like a 5 minute job. the relay is expensive the best price for mine was $i65 +shipping =$172 I got mine from a dealer in Rhode Island called TASCA FORD
http://www.fordparts.com/tasca
Good luck!