dead battery or a short?
1996 Ford Thunderbird LX v-6. I had a dead battery one morning used jumper cables to get it started made it to work and came home. I used the car for the next 7 days with no problems. The eighth day I opened the door noticed dome light and door lights were on but as soon as I turned key all went dead, no more lights. At the time of trying to start it I heard no clicking at all. I am not sure where to begin looking for a problem. Any ideas would be greatly appreciated!