i have a 1990 Mitsubishi Galant. We replaced the alternator on Monday. Drove it today on the way home and the lights went dim again radio went off heater went off. let sit over night went to start it won't do anything . well it tries to turn over then the battery runs down. hubby said we were running on just the battery power. by the time we got home we had no power at all. had to drive with the lights off at 9:45 pm that was real freaky to me. when we reached the house we shut the car off and now it will not do anything. I went out today to see if it would start and only the radio will come on but just until the battery completely dies. brand new battery and alternator so please help my hubby wants to blow the bitch up it . he is lost.