My 4WD is not working :mad:

[speed_racer_801]

I have a 2000 F350 CC chassis cab and my 4WD is not engaging at all. No dummy light on the dash, not noises from the tcase engaging the front axle, nothing. I have the shift on the fly dash knob and stock ford hubs that have both locked and auto positions and I have tried it both ways. Any ideas?

[Zaairman]

This manual shift or electric?

[drstephennix]

Originally Posted by Zaairman

This manual shift or electric?

Electric shift on fly as stated in 1st post.

Do you have a vaccuum leak?

[speed_racer_801]

I looked under the hood to try and find the solenoid, but couldn't see it. On my sport trac it was on the dr side inner fender , if you point me to the location so I can check it, I would be grateful. Wouldn't have putting the hubs in lock have solved that problem though?

[Zaairman]

Originally Posted by speed_racer_801

I looked under the hood to try and find the solenoid, but couldn't see it. On my sport trac it was on the dr side inner fender , if you point me to the location so I can check it, I would be grateful. Wouldn't have putting the hubs in lock have solved that problem though?

It's on the passenger side fender, by the vacuum reservoir. And yes, locking them manually would have fixed it. Check the connections at your switch.

[speed_racer_801]

Does the switch just pull out of the dash, or will I need to remove the whole dash?

[md18]

Something else must be wrong if you dont have any dash lights. If you switch it with the engine off can you hear the transfercase motor switching? It should be a brief zip noise.

[speed_racer_801]

No noises at all. I looked in the owners manual for a fuse maybe , but didn't find any that could be out, but did learn that there are two 4WD relays, is there a way to check them before replacing them?

[GoldieStroker944]

the switch just pups out of the dash...check where the vaccum hose connects to the transfercase i had that come off of one of mine and had the same prob but could be a back switch too

[speed_racer_801]

OK The back of the switch looks fine, may be something internal, but I cant do anything about that. Does anyone know how to check on the relays under the hood to tell if they need to be replaced? I am hoping that there will be something like a fuse, but have never seen anything like that on a gasser relay.

Can anyone point me to the vaccum hose on the Tcase?