I have a 1998 ford Explorer that will not go into 4 low. I can get it into 4 high, and I am pretty sure the wheels are engaging also. Light comes on. but when I twist the dial to 4 Low, No low range light , no clunk, and no 4 low. [and yes im stopped, in neutral etc....] Any Ideas? Everything else seems to be working fine. This truck has never had any 4x4 issues before. i was hoping maybe there was just a fuse or a relay that may have failed. or even hopefully just switch I can remove and test. I am pretty sure this is an electrical issue not a mechanical one. But I have no idea. Thanks!