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
http://www.startmycar.com/ford/f-150/i…