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Discussion Starter #1
Just earlier today, I switched from 2wd over to 4wd, and also into 4 low, and nothing. I've had the dash panel off most recently for some stereo work but I'm fairly sure that I remember hooking everything back up. Any suggestions on where to check to get the 4wd to engage? Thanks
 

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get out and manually lock the hubs on the front wheels and try it again. i bet you got a vacuum leak and it wont engage the hubs from the switch
 

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you probably have 1 or both of these two problems....

1. the ford 4wd runs off vaccum so you may have a leak in a vaccum line which you can replace yourself pretty easy...

2. your hub "seal" is not sealing properly and is not allowing the vaccumto engage your 4wd

are you able to manually engage in to 4wd bu turning the lockers????

if so then its probably 1 or both of these problems... if not then you probably have alot of money and problems ahead
 

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mine dont engage with the switch because of whatever is wrong with it, i think its a vacuum leak. i dont have time to play around with it. i only use 4wd at the track. i just get out and engage them while im there
 

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Discussion Starter #5
Thanks everyone. Okay, here goes with a dumb question? If I manually lock them, will it lock into whatever I have the switch is set? (I.e., if I switch to 4 hi inside, then get out and lock the hubs, it'll be on 4 hi, and vice versa)?
 

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yes sir thats how it will work
 

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Does the 4x4 light on the dash come on?
 

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No lights means that its an electrical problem, not a vacuum issue. Mine had a broken wire to the transfer case motor that caused that. Check your connection on the back of the 4x4 switch first. Then do you know anybody with a ford enhanced scanner? like the autoenginuity? There will almost certainly be a code stored that will point you in the right direction. Otherwise just check wires and fuses first, there are 2 relays under the hood in there own little box for the t-case motor.

And Jarrod,
Did you put your truck in neutral and hold your foot on the brake when you tried 4x4 low?
 

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No lights means that its an electrical problem, not a vacuum issue. Mine had a broken wire to the transfer case motor that caused that. Check your connection on the back of the 4x4 switch first. Then do you know anybody with a ford enhanced scanner? like the autoenginuity? There will almost certainly be a code stored that will point you in the right direction. Otherwise just check wires and fuses first, there are 2 relays under the hood in there own little box for the t-case motor.

And Jarrod,
Did you put your truck in neutral and hold your foot on the brake when you tried 4x4 low?
nope. what does that do? :dunno: havent heard that b4 and ill try it tomorrow to see what happens.
 

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The electronic shift on the fly system requires the truck to be in neutral, not moving, and the brake be depressed before it will make the shift into low range. Its a safety thing.
 

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Discussion Starter #16
No lights means that its an electrical problem, not a vacuum issue. Mine had a broken wire to the transfer case motor that caused that. Check your connection on the back of the 4x4 switch first. Then do you know anybody with a ford enhanced scanner? like the autoenginuity? There will almost certainly be a code stored that will point you in the right direction. Otherwise just check wires and fuses first, there are 2 relays under the hood in there own little box for the t-case motor.

And Jarrod,
Did you put your truck in neutral and hold your foot on the brake when you tried 4x4 low?

Even if I have an electrical problem, could I still just manually lock the hubs and then be good to go (if I can't find the electrical problem before I need 4wd capability?
 

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locking the front hubs only locks the front axels in not the transfer case. your transfer case is engaged by the switch in your truck
 
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