Q: Does the alternator and starter work together

asked by on

Does the alternator work with the starter in a car?

My car has 90000 miles.
My car has an automatic transmission.

No, they do not work together. The starter motor relies solely on stored energy in the battery to function. It is only after the engine actually starts and runs that the alternator can provide power to vehicle systems as well as re-charge the battery. The starter uses a lot of energy to turn over the engine. Once the engine does start, then the alternator generates electricity to re-charge the battery. The alternator also works with the battery as the car runs to supply power to all the vehicle systems. If the alternator dies, if the battery is fully charged at that time, the car will still run for a short while, the duration depending on how much power the vehicle requires. Never disconnect the battery from a vehicle while the engine is on. Disconnection will cause a voltage excursion that can potentially destroy sensitive electronics on the vehicle. ALL service performed on the alternator, battery, starter and any other electrical component of the vehicle must be performed when the vehicle is off and often with the battery disconnected. There are a million other cautions when it comes to working around the alternator and starter. Please, for your own safety, and to prevent damage to your vehicle, if you need assistance with these components, request the services of a competent, well trained and certified mechanic such as you will find at YourMechanic. If you desire to request service, please review the hundreds of services listed at the YourMechanic website and simply click on the services of interest. There is tons of information there about car and trucks! If you have further questions or concerns, do not hesitate to re-contact YourMechanic because we want you to make the most of your repair dollars and help you to get the best possible results.

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. Does the alternator and starter work together

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: car wont start after freezing weather. have been putting water in radiator and now radiator wont hold anymore.

Hi there. Unfortunately, water is the enemy of a radiator and the coolant system; especially in freezing or below zero weather. Water will freeze inside the radiator, in coolant lines and inside the motor in most cases. As it does,...

Q: Car broke down after making knocking sound.

This sounds like a possible loss of oil problem. If the engine has seized up before and the problem is reoccurring the engine is most likely dry. I would recommend checking the engine oil to see if it is low....

Q: All rotors warped - 2009 Kia Borrego

The braking system must be checked over a little more closely. Warped brake rotors can also be caused by malfunctioning brake calipers that are not releasing a they should. This can be caused by the caliper itself or a blockage...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.