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4x4 problems

1K views 8 replies 3 participants last post by  NYC F-350 
#1 ·
A friend of mine is looking for some help, he has a 04 f250 lariat with ESOF. When he turns the knob nothing happens, he says he can turn the hubs manually to lock, but not sure if that engages 4x4? Does just manually locking the hubs do anything? Where should he start to try to fix this problem? Thanks


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#2 ·
Turning the hub locks will lock the front wheels to the front axle. The transfer case would still need to shift into 4 wheel drive for power to be transferred to the front differential/axle.

EDIT: Give me a sec. I will post a PDF for the 04 ESOF
 
#5 ·
No, but you'll get worse mileage.
Have you checked fuses/relays?
 
#6 ·
No, but you'll get worse mileage.

Have you checked fuses/relays?

It's my friends truck, he checked the fueses and they were good, wasn't sure how to check the relays, but I read if you switch them around it is supposed to do something? Otherwise don't know how to test the relays
He did say he changed his battery's and now his truck only blows out the defrost, occasionally the vents but rest of the time defrost, could that be related

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