4a4 wont stay engaged on 1996 Ford Explorer

when i turn the switch from 2 wheel drive to 4 auto it engages for about 1 minute then both the 4 hi and 4 low lights flash 3 times and its in 2 wheel drive

by in Othello, WA on November 29, 2012
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2 answers
ANSWER by , November 29, 2012
possible actuator issue.
ANSWER by , November 29, 2012
have codes scanned and post so we can adv