Please help my truck is stuck in the middle of no where

[bedrockbobcat]

Hi guys i have a 03 f350 6 liter and here is what my issue is. I was out hunting and i went down a back road and i clicked my truck into 4x4 by turning the switch and it worked fine. Once i got on good road i took it out of 4x4 and put it back into 2wheel drive. When i went to flick the switch to put it into 4x4 nothing at all. My hubs are still locked but the light doesnt even come on the dash. Could i have blowen a fuse and what Number is it for the fuse?? I popped the 4x4 switch out and checked to see if i had power there and i only have power to 1 Wire when my lights are on. I was playing with the switch back and forth and testing the diffrent wires and nothing. What else should i check for???

[jimmyv13]

If the manual hubs are locked, you are overriding the electric(read: vacuum) 4WD and you are in 4WD.

[bedrockbobcat]

what do you mean by that. if the hubs are manually locked i should still be able to turn my 4x4 switch and it should click into 4x4. It always has before.

[jimmyv13]

The switch is for convenience. If your hubs are manual and you have them in the locked position, then your hubs are locked in 4WD regardless what your switch on the dash says.

[bedrockbobcat]

sorry bud your wrong. If the hubs are locked it doesnt matter at all. It does mean that your 4x4 is lockd in. I can have the hubs locked and still be in 2 wheel drice. Whats not working is the 2hi/4hi/4low switch isnt engaging the 4x4 for some reason and im not sure where to check

[jimmyv13]

Read up on the ESOF and decide for yourself...

[thomaslord84]

I believe that he is saying that the transfer case is not shifting in and out of 4x4. If the hubs are locked and you switch it into 2wd, yes your hubs are still locked but you are not in 4x4 because the front tires are getting no power from the transfer case.
I think your problem is probably that there was a chaffed wire under there and it shorted out and blew a fuse. Check you owners manual it tells you what fuses do what. It may also be that the solenoid on the transfer case that actually does the shifting is bad. Neither is an expensive fix.

[jimmyv13]

If that's the case, then mine transfer case is not working properly either. If I switch to 4X4 HI on the dash and leave the hubs in auto, all 4 tires spin on gravel. If my switch is in 2WD and I get out and manually lock the hubs, all 4 tires spin on gravel. If my switch is in 2WD and my hubs are in the auto position, only the rear wheels spin.

[thomaslord84]

Originally Posted by jimmyv13

If that's the case, then mine transfer case is not working properly either. If I switch to 4X4 HI on the dash and leave the hubs in auto, all 4 tires spin on gravel. If my switch is in 2WD and I get out and manually lock the hubs, all 4 tires spin on gravel. If my switch is in 2WD and my hubs are in the auto position, only the rear wheels spin.

Then yes I believe that you might have a problem. If you jack the front of your truck up off of the ground, leave it in park, and turn the front tires with your hubs in auto and the switch in 2wd, the only thing that should turn is the wheel, not the driveshaft. Now leave the switch in 2wd and manually lock the hubs and do it your driveshaft should turn also and you should be able to turn the wheel with minimal effort even though the tranny is in park. That means that you transfer case is in 2wd.

It may be different for the IFS trucks but I doubt it. Its still just a 4wd system.