so i figured out that the vaccums for the 4 wheel drive were what is messed up... and i appreciate the help... but i was wondering if i could just buy the solenoid or do i have to buy the whole set up the center disconnect motor and all...

 

The components are available separately. I bought the solenoids, the vacuum harness and the short electrical harness at the U-Pull-It for $15.

 

well hopefully i will be able to get it that cheap also.... thanks man.... i m going saturday....

 

got it fixed it was the blue vaccum line was cracked and didn't see it at first... four wheel drive is back in great shape...

 

Glad it works. It's usually something pretty simple once you track it down.

 

hey everyone... i have a 2005 F150 4x4 and recently by 4 wheel drive has stopped working. The 4 high and 4 low lights come up when i start up the truck but when i'm trying to use either they will not show up and the relay doesn't even click over. anyone have any ideas?

i have also read on a few forums that it way be caused by the vacuum line being damaged or broken. Anyone know where these are located so i am able to check it/them?

Thanks,

AJ

 

Totally different setup in the 04 up. If it was a vacuum problem to the front IWE's, you would hear a grinding noise when in 2wd. Default position for them is locked. More likely if you have ESOF, it is a bad switch or gem module.

 

i have a 97 f150 4x4 shift on dash no response whatso ever no lights on dash and sound of shifter engaging help!!!!

 

Hi
I hope i am posting in the proper area. I am new to the site. I have a 1998 F150 Lariet. I select 4x4 high and the light in the dash illuminates but the front end does not engage. After reading some dialogue on this site I checked the vaccum solenoids and can detect that they are functioning as they should. Not sure if vaccum is sufficient to draw in the shift fork or not. I can feel the vaccum when I place my finger over the hose. I can not manually move the shift fork in either direction. Could anyone have any insight. Could it be the fork is broken inside the differential and jammed up.

 

Thank you for taking the time for your great explanation and photography on the electronic shift 4WD in 1997 and newer ford trucks.

Im sure you saved people tons of cash not going for dealer repairs. My local dealer wanted $500 for the work.

Thanks,

John

 

My wife's 03 F150 wil engage in 4HI but will not engage 4LO. The relays are working because the lights dim a little when switching into and out of 2HI, 4HI and 4LO. Would this be a vacuum problem as well? She does not use 4WD very much at all and was surprised she opted for it. Guess she wants to be like me. I drive an F250 Diesel with a 4WD shifter on the floor.

 

Did she follow the directions to be stopped, transmission in neutral, foot on the brake before she shifted into 4lo? That is the usual cause of 4hi working but not 4lo.

 

Yep! I have tried it several times as well. Just been too lazy to get it in to be fixed. I hate having to take vehicles to other people to have them fixed. Which is why I am here. I would rather save time and money with the help of others first. Thanks Kingfish51.

Any other thoughts?

 

Just went out to try it again. When I am in Neutral, the brake is applied, I switch it to 4HI. The light comes on and click, it is engaged. I then switch to 4LO and click, click, click until I put it in gear, but the Low Range light is not lit, which I assume means it is not in 4LO. Any other thoughts?

 

Is it just that the light is not working, or is it truly not in 4lo? Easy to tell as the engine will be screaming at about 25mph.
Also, is it working for sure in 4hi?

If it is working in 4hi, then that probably narrows it down to 2 things. The TC itself (I include the shift motor in that, or the neutral switch (or whatever it is called). If it does not know it is in neutral, it will not shift.