[Jeremy-WI]

When you have 4HI or 4LO selected you should have 12v at the brown and light blue wire at the front actuator. The brown should have 12v anytime the ignition is on. Chances are, is that you are losing power to the light blue and that might be caused by a bad splice at the transfer case switch(where the brown for the actuator is spliced into the brown wire from the 4x4 fuse) or possibly a bad switch