The 4X4 light keeps flashing off and on all time. When i try to engage the 4X4 it don't work... Have changed the motor on tranny andstill don't work... Any suggestions? Could it be the switch? How hard is it to change?

 

[did you reline the moter up where it line up too wheel drive if so you will need to take the battery neg cable off for 30 sec to reset the coputer i had the same proublem on 1995 fordexplorer i hope this will work for you