Q: Hello. I just had my battery replaced but today all lights go on but car won't start

asked by on

I had my battery replaced the other day. Car started up but wont stay started and now it wont even start

My car has 18300 miles.
My car has an automatic transmission.

It sounds like you may have a weak battery, a failing voltage regulator or failing alternator. As you may know, the alternator charges the battery while the engine runs by generating amperage and recharging the battery while the engine turns the alternator pulley. The voltage regulator is a unit that regulates the charging of the battery by the alternator and maintaining a certain amperage while the engine runs. When the alternator is not working properly, this may result in the battery quickly losing charge and the car losing all power. You may also notice a whining sound as a result of the bearings inside the alternator begin to fail. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your charging system.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Hello. I just had my battery replaced but today all lights go on but car won't start

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: 98 zj 5.2 v8 with coolant leak but not overheating

The only way to make sure where it is leaking is to put pressure on the cooling system and then visual check the entire system to locate the leak. The water pump is the most common cause of the leak...

Q: Need brake pads on infiniti...will it be infinit pads?

Hello, and thank you for writing in. Simply put, no, the pads will not necessarily be infinity brand. While there are many manufactures of brake pads that will make replacements for your vehicle, you can get brand name replacements from...

Q: Peugeot 206 won't start.

Hi there. I would check to be sure the engine is getting fuel, air, and spark. If the Check Engine Light is on, I would recommend having it hooked up to a scanning tool to see what trouble codes have...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...