Yesterday after I started my car after it sat for about a week the speakers aren't working correctly. The front driver door speaker works fine, but the rear driver and front passenger barely work. I don't think the rear passenger speaker works at all. The speaker in the back window works fine too. I recently put halo lights on the car and have an 8 year old battery. Do I need a new battery?

 

No, test rear door speakers may be blown. Get em replaced at best buy audio if so. I had all mine replaced with alpine and they work with bose HU. If the battery is that old you should replace tho. Alt should run speakers when car is running.