How do I turn on the 4 X 4 on my 1999 Ford Explorer or is it automatic? I don't have a manual. Is there some sort of button on the dashboard?

There should be a knob or selector on the dash usually located to left of the radio. When you put your vehicle in 4wd you can do this on the move at a sloe rate of speed but never try to put it into 4wd low on the move or it will hurt the system. To put the vehicle in 4wd Lo stop and put your transmission in neutral and the select 4wd Lo. Hope this helped you out, Roger

If it say advance trac on the back its automatic stop by you local Ford dealership in the service department and they be able to tell you wish you the best of luck Michigan Man.

Its automatic but you can also change it the knob or switch is by the radio should say 4hi 4low or automatic