2001 montrero limited with 4x4 blinking front axle(green) and interlolck light(orange) blinkig. iguess this is a common problem. after reading many posts i desided to put the truck up on ramps and go under and grease up the actuator that engauges and disengauges the front axle. i noticed that one of the vacuum lines that connects to the actuator had a
small hole in the hose, so i cut off the section with the hole and reconnected, road tested, problem solved. hope this can help anyone else.