My 1998 Mercury Mystique was running fine until my abs light came on and suddenly my rpm gage did not work, then my car shut off and wouldnt turn back on. It wouldnt turn over or nothing. I had the alternator checked and it was fine and then had a new battery put in. Then it worked fine for a little while until the next day when it had the same issue. Do you have any clue what could be wrong with my car?