What would cause my alternator and battery to keep dying?
Some of the most common reasons for a car battery to die repeatedly include loose or corroded battery connections, persistent electrical drains, charging problems, constantly demanding more power than the alternator can provide, and even extreme weather.
Can a car battery drain the alternator?
2. Corroded Alternator Diode. If your battery is not old, but it still drains when the car is off, you should inspect the state of your alternator. The alternator is responsible for recharging the car battery and powering electrical systems of the car such as the radio, lights, ignition, etc.
Can a battery die with a good alternator?
It doesn’t matter if the cable is for the positive or negative terminal. Another reason why a battery keeps dying even with a good alternator is when the alternator is not given the time to recharge. Frequent starting and stopping draws a lot of current but does not allow the alternator to recharge the battery fully.
What should battery voltage be in Toyota Sienna?
First thing I would check is the alternator. With the engine off, see what the voltage is on the battery terminals. It should be a little above 12 V. Then turn the engine on and running, check the voltage again. It should be a little over 13 V, but under 14 V.
Why does my Toyota Sienna have a dead battery?
If you place your faith in it, you will likely experience dead batteries on a frequent basis. If someone clicks on an interior light and forgets to turn it off and/or leaves a door/hatch open, the lights will most likely stay ON and draw down your battery.
Why does my Toyota Corolla battery keep going dead?
My 2014 Toyota Corolla battery has had problems since new. After four attempts to find reasons for dead battery and 2 new replacement batteries problem still exists. Corporate tells me if this car is not driven for 2 days it is considered long term storage and dead battery would not be unusual. Their solution is to plug in a trickle charge.
Why did the battery drain on my new Toyota?
Maybe the voltage drop was from the old battery, if the new one is 12.6 steady for days now. Most auto parts stores and places that sell batteries have a fancy diagnostic machine that will check the battery health and charging system, and they’ll do it for free. You might have a bad new battery; it happens.