I actually have a couple of problems, so i hope someone can help me, first of all both back brake lights are out in my 2005 cts, changed lights and took fuse out and it doesnt look like theres nothing wrong. neither r working, but anyway at this point its probably least of my problems, the other night i was setting at my work with the cell phone charging and listing to the radio without the car started, i went to try to start it and all it done was click wich the battery was dead... i unhooked the cell phone waited about 10min and it started up... I took it to parts place and they checked battery and it was good... so i turned the key over to acc just where the radio comes on and with then 2min it drained all the power from my battery.... as long as the car is going its fine, but if the key is in ignition and turned to acc it goes dead fast...what could be the problem with either issue here...