Will a bad radio drain your battery?
If the stereo is old, it can drain the battery due to a faulty relay. If a radio is newly installed, it is most likely wired to a fuse that receives power when the engine is off. Tip: If your car radio drains the battery, the first thing I would do, is to test all wiring connections.
What can I do if my car battery keeps dying?
To check cold-cranking amps, you need a specialty tool. The good news is that you can take your car to AutoZone and they will test and charge your battery for free. Check the alternator. Yes, you think it’s okay, but did you check it the right way?
Why does my car battery keep dying even when the alternator is good?
There are a few reasons that your car battery could keep dying even if your alternator is good. The most common explanation is that you have a bad battery. It doesn’t matter how much juice your alternator is pumping into your battery if it can’t hold a charge. You also might have something that is drawing power after you shut off the engine.
What causes battery to die on Mercedes medic?
A defective electrical system, Control Unit or a fault on the CAN Bus (Controller Area Network) are also causes that can cause your Mercedes-Battery battery to die. To troubleshoot the current draw, you need a multimeter that can perform current reading.
What causes a car battery to drain in the morning?
If your alternator has a bad diode, your battery can drain. The bad alternator diode can cause the circuit to charge even when the engine is shut off, and you end up in the morning with a car that won’t start. 5. Extreme Temperature
Why does battery die after a few days?
The repeated issue where it is dead after three to five days of sitting suggests something turns on/off on its own so that there is a drain that hasn’t been occurring when the tech made the routine tests. The tech is going to have to connect test equipment and keep checking this periodically and be ready to react when the drain occurs.
A defective electrical system, Control Unit or a fault on the CAN Bus (Controller Area Network) are also causes that can cause your Mercedes-Battery battery to die. To troubleshoot the current draw, you need a multimeter that can perform current reading.
Is there something wrong with my car battery?
They have tested and analyzed battery and charging system and find nothing wrong!!! (Battery was replaced last March). They say drain measured very low (3mA?). One ?clue: when jumper cables are hooked and powered up to start car, you can hear the CD changer trying to find a CD or something. But there are no CDs and we never leave it on.
What should I do if my Subaru battery dies?
The second issue is having a problem like this doesn’t make the measure of whether a car is reliable or not, and it doesn’t reflect on the capabilities or diligence of the shop and the technician.