4wd won't work

Ford F-150 2003 4.6 auto. 4wd 115000 miles
Esof not working ,when u switch the dash selector switch nothing happens found that the 2wd vaccum valve [under Hood] never drops out and the 4wd valve never turns on. There isn't any clicking noise indicating that any relays r trying to work also found resistance values at dash switch 3k for 2h, 1k for 4h and 300 for 4l what should the voltage be at switch i have the constant 12v on the coils for the vaccum valves but the gnd is not switching to turn the 2w off and the 4w valve on
mike from United States 8 years ago  
MI
5 reports 
Knuth from United States 8 years ago
If it's not the actuator, Check the vaccum hose underneath the seloniods. Let us know when you find the problem!
mike from United States 8 years ago
What should the voltaje be at t. C. Motor and where r the relays that normally click when u switch from 2h to 4h
Knuth from United States 8 years ago
Here are the manuals for the F150, maybe you can find the info you need there?

http://www.startmycar.com/ford/f-150/i…
fordBoy from United States 7 years ago
Thanks, I needed the manual
Submit replyCancel


Did you find the website helpful?

Thank you!