I recently put a new alternator in my 97 D1. When I went to recode the radio, it wouldn't accept the code. I left the battery disconnected for most of the day and it still would not work after reconnecting it. Every time I drove the car I'd try the code and nothing worked for 3 days. Last night I was driving along and tried the code again and sure enough it worked. I can't find any rhyme or reason why it was not working before and then all of a sudden decided to accept the code. Has this happened to anyone else before?