Why is my car battery suddenly draining so fast?
A short circuit may cause excessive current draw and drain your battery. Check the charging system for a loose or worn-out alternator belt, problems in the circuit (loose, disconnected or broken wires), or a failing alternator. Engine operation problems can also cause excessive battery drain during cranking.
Why does my Subaru ascent battery keep dying?
CSK&D is investigating reports that 2016-2020 Subaru Outback and 2019-2020 Subaru Ascent vehicles experience random liftgate openings and other electrical issues which cause the batteries in these vehicles to rapidly drain. This often occurs overnight or during intervals of non-use.
Why is my Subaru Legacy battery draining while driving?
If your battery is draining while driving, it is almost without exception the Legacy’s alternator that is causing the problem. If it is you should see the battery or alternator light on, it indicates that the alternator is not creating the necessary voltage to charge the battery.
What causes a car battery to drain under the hood?
Parasitic Drain. The most common causes of parasitic drain are under hood lights, trunk lights, headlights or glove box lights that do not turn off when the door is closed. Relay switches that are stuck in the “on” position can also cause a battery to drain.
What should I do if my car battery is draining?
If you can’t find the cause of the battery drain, a manual draw check of the electrical system will need to be performed. With the ignition key in the off position and the doors closed (driver’s side window down) disconnect the battery cable on the negative side.
What does it mean when battery drain is slow?
A slow battery drain when everything is off is called a parasitic power loss. This happens when something – a glovebox light, an amplifier, any electrical component – is pulling power from the battery when it shouldn’t.