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Bizarre 4WD problem 2011 F250

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Old Aug 27, 2019 | 06:04 AM
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Bizarre 4WD problem 2011 F250

2011 F250 4WD. When the key is switched on with the engine NOT running, the 4WD works perfect. It shifts in and out no problem. When the truck is cranked and the engine running the 4WD does nothing. No dash lights no sounds. Nothing at all. Someone please help. I’ve been fighting with this for like a year.
 
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Old Aug 27, 2019 | 08:20 AM
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If you engage the 4wd first, and then turn the engine on, what happens? Does it stay engaged or disengage or just die?
 
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Old Aug 27, 2019 | 01:27 PM
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Originally Posted by seville009
If you engage the 4wd first, and then turn the engine on, what happens? Does it stay engaged or disengage or just die?
It seems to stay in 4x4 but the lights go off and don’t say 4x4 anymore. So it looks like it’s in 2wd but feels like it is still engaged when you try to drive and nothing happens when you turn the switch. Then you have to cut the engine off to shift out of 4WD.
 
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Old Aug 28, 2019 | 03:05 AM
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May be simply the switch itself then if the 4wd is act working

i’d stick A new switch on; not expensive and might solve your issue
 
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Old Aug 28, 2019 | 05:58 AM
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Originally Posted by seville009
May be simply the switch itself then if the 4wd is act working

i’d stick A new switch on; not expensive and might solve your issue
I tried a new switch and still the same problem. I’ve checked the relays and fuses and they are all good too.
 
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Old Aug 28, 2019 | 11:29 AM
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Loose wire maybe?
 
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Old Aug 28, 2019 | 06:56 PM
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Originally Posted by seville009
Loose wire maybe?
I don’t know. I wish I could find it and it be something simple.
 
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Old Aug 30, 2019 | 05:52 AM
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Bump. Still need ideas.
 
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