My 1996 eddie bauer 4.0 litre 4x4 wontr stay in 4 wheel drive on 1996 Ford Explorer

its a 1996 eddie bauer explorer with automatic transmission and a 4.0 l v6 it was fine then as of last week if i turn the switch to 4 auto is fine for about 30 seconds then both the 4 auto and 4 low lights flash a few times then nothing backin 2 wheel drive what can cause this

Asked by for the 1996 Ford Explorer
ck for 4x4 codes could be actuator or pwr to them. this is a very touchy system
1 more answer
actuator problem