radiator flush and 4x4 lights on 1996 Ford Explorer

how do you flush the radiator in a 1996 eddie bauer ford explorer 4.0 4x4 and my 4 low and 4 auto lights start flashing and i have no 4 wheel drive when this happens is it the switch?

Asked by for the 1996 Ford Explorer
First thing to check on 4x4 problem is the actuator motor on the transfer case.
Can "tap" on it with a small hammer if it now works replace it!! They give a bunch of trouble.
1 more answer
have a lube shop flush it