What car part drains the battery?
Alternator
Defective Alternator 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.
What causes a battery to drain out?
“Electrical devices or lights left running, a defective charging system or alternator, and extreme weather are some common reasons but maybe it’s just time to get a new battery.”
When does the battery drain on a VW?
We called VW HQ to “register” this as a problem before the warranty expired. Since you appear to be on new car warranty, then it is time to check out your states lemon laws. The battery drain could be something coming on after the car is parked. Anytime after one hour of being parked, and several times afterwards, sneak up on your car.
What should I do if my Volkswagen Passat loses power?
Turn the key on, but don’t start it. If you have to jump it, leave the jump in place to run the computer Leave it with key on, but not started for about 15 minutes. After that it should start. Exp.builderchick 8 people found this helpful. I lost power windows after disconnecting the battery and the fuses are still fine, what’s the issue anyone?
What can drain the battery on a car?
There are things that don’t have fuses, which can drain a battery —– the starter cable and solenoid, and the power cable connection to the alternator, or the alternator internally. You can try to stop the drain, when parking for an extended time, by pulling all the fuses except the ECM (PCM?) engine computer, and radio fuses.
What happens when you change the battery on a VW Golf?
I changed my VW Golf 2016 battery yesterday. While changing to new one, the old is battery is fully disconnect. After changing to new one, It still won’t start, and display some error message (tyre pressure flat, and some others) What the mechanics did was to off the car, and get into the the car with they key.