On my way to friends house and back yesterday after about 15 min for driving Power Supply Service Urgent light would come on and battery light.... Stereo was still pumping and ac was blowing so nothing shut down, after turning off car it would start right back up with warning light not coming back.... Figure alternator or dead cell in battery? Anyone been down this road before? Heading to palm springs in a week with wife and baby and need to get this addressed be fore I am on the side of the road with a unhappy wife and baby lol.