2002 Ford Explorer 4x4

My 4x4 high and 4x4 low lights are blinking 3 times then off for a few minutes then blinks 3 times. This cycle continues while I am driving. Is this anything to be concerned about???

Not sure, but it sounds like maybe the control module may be bad, or some thing in the curcuit. Look over myCarStats.com to see if there are any issues regarding the 4x4 system that you might get fixed for free ( Technical Bulletins).