..........no 4x4............. - Ford Powerstroke Diesel Forum
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Old 01-15-2010, 04:37 PM
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..........no 4x4.............

No 4x4, replaced transfer case motor,starts out 4hi switch to 2hi then back to 4hi nothing,new transfer case motor good. get codes p1866 c1728 p1828 p1820 p1867. Any help would be good.
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Old 01-15-2010, 05:17 PM
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u sure the problem is in the t-case and not in the diffs ... did u manually lock the diffs nd try it because the auto locking vacuum stuff isnt the best thing in the whole world lol
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Old 01-15-2010, 05:23 PM
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manual lock.........no vaccum
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Old 01-15-2010, 07:15 PM
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im not sure what it could be then but ill give a bump hopefully for someone who does
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Old 01-15-2010, 08:06 PM
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Does that circuit run through a relay?
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Old 01-18-2010, 08:17 PM
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The Dash 4x4 switch send a signal to the GEM computer which then switches the 4x4 relays. The 2 relays are mounted under the hood next to the fuse box.
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Old 01-19-2010, 03:32 PM
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............replaced g.e.m. module tonight{those things are not cheap} still no 4x4?????LAKETROTTER how do you check a relay????????? THANKX FOR THE HELP.....
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Old 01-19-2010, 03:46 PM
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So you can lock the hubs and have 4x4 or not?
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Old 01-19-2010, 03:51 PM
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best way to check a relay is swap it with a known good one.
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Old 01-19-2010, 03:53 PM
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.............no 4x4.......do not lock hubs flip switch to 4hi .......nothing....no dash light
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