I'm having a problem with my battery going dead on my 93mtx. Ford has replaced it several times within 6 months but I think there is some type of short. Each time my radio ( new one ) needs to be reprogrammed. I noticed this time the the doors locked when I shut them or when I shift out of reverse into 1st. Strange. Seem to happen right after I had the fuel pump replaced. I also tried to read the code reader I bought. It came out 511 511 3 3. So it doesn't look like it read anything. (did hear everything click and run). HELP and THANKS!!