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Old 02-25-2013, 12:18 PM
hogancon hogancon is offline
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4wd quit working

I have an 01 F250 7.3. The other day when I went to switch it into 4wd the light didn't come on and I had no 4wd. I have been putting the hubs in the lock position when needed for about a year now. I have been reading threads for 2 days. I think it might be in the TC but not sure, and don't know how to test it. The front drive shaft is spinning when driving. Any help would be appreciated.
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Old 02-25-2013, 12:22 PM
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Hi hogancon and welcome to FTE.

It sounds like the motor that shifts the transfer case is not working. I would start by checking the wiring harness and making sure the motor has power going to when it should.
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Old 02-25-2013, 12:36 PM
hogancon hogancon is offline
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Thanks for responding so quickly redford,
Would that be something likely to quit all of the sudden? Just to give you a little back ground on my electrical skills... I have a volt meter, but am not very good at knowing what to do with it. I fried my last one on its first use.lol It looks to me like there are two wiring harnesses going to the TC. Do I need to check both?
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Old 02-25-2013, 02:11 PM
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Here is a post I wrote a long time ago on diagnosing 4WD shift problems. The fuse numbers are 2002-2004 specific, so they won't apply, but everything else should.

http://www.ford-trucks.com/forums/10...l#post10605244

In place of the fuses I outlined, dig out your Owner's Manual and check any fuse that says anything about the General Equipement Module (might be called the General Electronics Module), 4WD, and anything that is a "feed" (Run/Start feed, etc.)

I may be able to dig up model year specific fuse information, if you hit a dead end.
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Old 02-25-2013, 02:26 PM
hogancon hogancon is offline
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Thanks dchamberlain, I will check it out and let you know what I figure out.
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