94 Ford Exp 69K. 4x4 is not working. Some times the lights next to the selector buttons on the dash will both light dimily. Nothing is heardwhen pressing either. Some times the lights go out. The other day pulling into the drive way they both lit and the 4X4 indicator on the dash came on. The car was not in 4X4 because I drove it on the road and made some tight turns and it would have been obvious if it was in fact in 4 wheel. This light stayed on for approx 2 hours then went out and both push button switches went back to dimly lit. I have read posts about looking the the 4X4 module in the rear driver side panel and watching led's or pressing the reset button. On mine there are no led's or a reset button only a black box. Has anyone had these issues? Any Ideas?