Rear self adjusting brakes

I can't imagine the adjusters causing lock up either. It's more common for self adjusting to not work at all. First vehicle I saw, and only one I've ever seen, that didn't have all the self adjusting bits in place was a late 80s Crown Vic', ex or retired police car. I was told they were delivered this way. The adjusting was part of routine maintenance. The new owner and myself too learned something that day.