94 explorer 4wd problem

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- bosch44
  
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posted
15 years ago

Mon, Aug 4, 2008 2:45 AM

I Have a on the fly 4wd setup on my exploder, when i push the button nothing happens, I have checked all fuses and also pulled the syncro motor on the transfer case and bench-tested it, OK, Does anyone know where to look next? It was working and now I have nothing, I also lifted the front end off the ground and with the selection motor off i could move the selection shaft to 4wd manually and the front wheels did lock in which to me counts out the transfer case mechanically, is there a solenoid cooked somewhere between the selector swith and the drive motor?

Thanks

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- ben91932
  
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posted
15 years ago

Mon, Aug 4, 2008 5:34 PM

No solenoid. There is an electronic shift control module over the left rear wheel well, with it's ground nearby. As usual, before jumping to expensive conclusions, check powers and grounds thoroughly. Interior fuses 7 and 13(17 if it's an electronic dash), fuse 7 @ power distribution box Grounds at the shift module and left cowl. Check switch for continuity. Try this: Raise and support the truck wheels off the ground. (Safety! Safety!) Have a helper cycle the switch while you are underneath rapping on the shift motor, just like we used to do on starters. There is a set of contacts under a cover on the shift motor which dry up and get corroded, especially if it doesnt get cycled regularly. The cover is held on with (I think) 3 tamper proof torx screws, and if you pull it make sure to index it. Good luck, and happy hunting, Ben

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- Ashton Crusher
  
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posted
15 years ago

Tue, Aug 5, 2008 4:43 AM

I redid my shift motor three times. After the last time it stopped working I just bought a new one. The internal stops inside the motor are poorly designed and it over-runs and jambs. Hopefully the new one (aftermarket brand) has better designed internal stops. I think it was less then $125 for the new motor and gear head.