ok for starters i have a 05 AT 8, car sat for about 3 wks while i was driving something else, went to start and the battery was dead. charged it up and only cranked. so i started the de-flood process but my battery charger wouldnt keep the battery up. went and exchanged for a new battery come home hook it up and also put jumper cables on from my other vehicle to hep keep up the 8 while i cranked it. got through one cycle of cranking, cycled the key, then click.....no electric power whatsoever no lights no dings no nothing. took the battery to get tested and its all good. checked the main fuse its good......dont know where to go from here. and help would be greatly appreciated

 

check ALL the fuses