How to Diagnose a Faulty Ford IWE 4x4 System 

A short description of the IWE 4x4 system on the F150. How it functions and how to fix it!!
Here's a parts list for ya.
Check valve and solenoid lines - OEM Part Number (BL34-7A788-AA) www.amazon.com...
Solenoid - OEM Part Number (7L1Z-9H465-B) www.amazon.com...
Actuator - OEM Part Number (1S12254; L30001; SK600105; 7L1Z-3C247-A) www.amazon.com...
Actuator Lines - OEM Part Number (BL3Z-7A785-B)
www.ebay.com/i...