Why is my stereo draining my car battery?
Car audio systems draw power from the car battery and will drain the battery if the engine and alternator are off or if the alternator cannot charge at a rate faster than what the audio system requires. Aftermarket systems may draw too much power, and poor installation may cause parasitic draw.
What can drain a car battery when the car is off?
What may drain a car battery when it’s off are things such as interior lights, door lights, or even bad relays. While your engine runs, the alternator recharges the battery — which is why you typically don’t have to worry about the battery dying while you’re blasting the radio on your drive to work!
Can a radio fuse drain a car battery?
No a burnt fuse can’t cause battery drain issues. Some fuses don’t get power until the circuit is turned on so don’t be concerned about them. Has your battery been replaced or load tested to make sure it’s good?