Blinking 4 lo light

When I switch my transfer case into 4 lo the indicator light just blinks and the t case dosent engage.However when I switch to hi everything is normal.Oh yeah it is an 01 with an auto 45RFE.No real huge problem but a big neusance thx

The transfer case is not going into 4 lo. Might be the motor that engages 4 lo.

Thanks for the help.But the problem went away on its own.I guess I was just nol letting engage properly.