I just bought a Cadillac 2009 cts, they replaced the factory issued radio because they said it was draining the battery. I accidently left my car on accessory mode so I had a jump start to get it back on, my voltage read 14.-14.5 but I noticed after getting the car on, the ac button or tempature buttons don't turn on and stay blank no light on.. Im wondering if it was reset or because its wired to kenwood radio set or if my battery needs to be fully charged.