Normal Operation
WARNING: This page is about a different car, the 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Once the 4WD system engages the user selected mode, that mode should be maintained. If the 4WD system does not stay in the selected position, systematically check the 4WD system components.
This pinpoint test is intended to diagnose the following:
- Pulse vacuum hub lock (PVH) vent line(s)
- Mode select switch (MSS)
- Transfer case