4WD Vacuum Lines
Thread Starter
Junior Member
Joined: Dec 2013
Posts: 20
Likes: 0
From: Dillsburg, Pa
4WD Vacuum Lines
98 F150 4.6L 5Sd
Can anyone tell me where the Vac Lines run on my truck that assist in engaging the 4WD?
My 4WD is not engaging and my Hanes Manual doesn't show it
I have the indicator lights just not engaging
Thanks
Can anyone tell me where the Vac Lines run on my truck that assist in engaging the 4WD?
My 4WD is not engaging and my Hanes Manual doesn't show it
I have the indicator lights just not engaging
Thanks
Senior Member
Joined: Sep 2011
Posts: 419
Likes: 42
From: Minnesota
The vacuum lines go behind the battery to the solenoid for the front axle. You can trace the lines down from there. Most likely the actuator on the front differential is corroded and needs to be worked back and forth or replaced. Light on the dash is telling you the tcase is in 4x4.
