4x4 high light flashes on and off on 2002 Ford Explorer

flashes on and off about ten times

Asked by for the 2002 Ford Explorer
you will need to retrieve codes to begin diagnosis that will point you in the right direction,but I have personally replaced dozens of shift motors on these trucks.
what and where is the shift motor located. i just had the transmission you have to pull the transfer case to replace the shift motor? the light was not on before having tranny rebuilt. is some thing they have caused?
it's on the outside of the transfer case and you don't need to remove anything to replace it,if it is the cause anyways. sometimes you can tap on the motor with a hammer and get it to momentarily work.