I have a 99 Navigator that is all wheel drove. It also has a switch to put it in 4 wheel drive and 4 low. It was put into 4 high and now it won't come out. So far I have removed the shift motor and it shows that it is 2 wheel drive. The shift motor does work and it does go into 4 low and comes back out. The light does go out and I have scanned the gem module and it shows no codes. I also have put in in and out of high to awd and backed up several times with no results.