Hi,I have a 99 blazer w/autotrack 4 button system and recently was stuck in 4 wheel,a friend read the codes and co327 and co323 came up ,he said replace the encoder and repair the bad wire to encoder,so i've replaced the encoder and the n red light comes on dash switch,but when i try to shift transmission to n to change mode tccm clicks and goes service 4 wheel again on dash andall lights on switch go out,ive tried resetting with batt disco but keeps doing the same.help