Can You Jumpstart A Car With A Bad Alternator?

Yes, You jumpstart a car with a bad alternator.

A bad alternator basically means that the battery isn’t charging properly and therefore can’t power the car’s electrical system. The battery will still be able to provide enough juice to get the car started, though, so all you need to do is hook up jumper cables from another vehicle and start it up.

How to identify a bad alternator

When you start your car and the battery light on your dashboard comes on, or when you’re driving and the battery suddenly dies, chances are that it’s time to replace or repair your alternator.

Here are some steps to help identify whether this is a problem with your alternator:

  • Check for charging problems by checking for electrical problems in any of these areas:
  • The charge light on the dashboard
  • Battery voltage with a voltmeter
  • Clean cables and terminals on both ends of the battery; make sure they’re not loose, corroded or damaged
  • Look at how easy it is to rotate each pulley relative to its bracket. If one seems like it doesn’t want to move, then either there’s something wrong with its pulley shaft seal or it’s seized up due to excess heat from friction which means that this part needs replacing right away.

What is a Car Alternator?

A car alternator is an electrical device that converts mechanical energy into electrical energy. It is a vital component of an automobile, providing the vehicle with its electrical supply.

The car alternator is a generator that produces electricity from the engine’s spinning crankshaft to power all of the electrical items on your car.

In addition to powering all of your vehicle’s lights and audio systems, it also recharges your battery when it runs low or dies out completely, which allows you to start up again without having to jump-start from another vehicle.

Why shouldn’t you jumpstart a car with a bad alternator?

There are a few reasons why you shouldn’t attempt to jumpstart your car with a bad alternator:

The alternator is not putting out any power

The battery needs electricity to start the car, but it also needs electricity to keep running. With no power coming from the alternator, there’s nothing left for the engine to run off of.

You could try jumping your battery directly into another set of cables attached to another vehicle’s battery; however, chances are good that both batteries will die at once after they’ve been drained of all their power and won’t be able to restart themselves again unless one of them is replaced or repaired first.

The alternator isn’t charging up correctly

In addition to providing power for starting up your engine when needed, an alternator also charges up your battery so that there’s always enough juice left whenever you need it later on down the road—but only if everything works properly!

If something goes wrong with how well charged-up your battery becomes during those times when you do start driving around town, then there might not be enough juice available by default when trying again later down

What happens when you try to jumpstart a car with a bad alternator

  • The bad alternator will be damaged.
  • The good alternator will be damaged and the battery will be damaged.
  • The car may not start at all, and if it does, the repair will likely cost more than what you could’ve earned from selling a working car at that point in time.

Can you still drive your car with a bad alternator

So you’ve got a bad alternator and you want to know if you can still drive around with it.

The answer is yes, but there are some caveats.

Common symptoms of a bad car alternator

The alternator is an essential part of your car’s electrical system. It regulates the charge for your battery and keeps everything running smoothly. If you notice any of these symptoms, it’s likely that you need a new alternator:

  • Your car won’t start.
  • The engine is running but the car isn’t moving.
  • The battery is dead even though it was charged recently or replaced recently.

Why it’s important not to try and jumpstart it?

If you have a dead battery, and your car is not running, then yes, you can jumpstart it. If the car’s alternator is bad and it doesn’t produce enough power for the battery to charge up, then no.

If your alternator isn’t working properly, even if you do manage to jumpstart your car, it won’t be able to stay running long enough to get somewhere where they can fix it or replace it with a new one. There are several reasons why this could happen:


A car with a bad alternator will have trouble starting, but it can still be jump started. If you’re trying to start a car with a bad alternator, make sure you’re using correct cables that are rated for the type of car you’re trying to start.

So, jumping a car with a bad alternator is not recommended for many reasons. It is possible, but it’s not safe and can damage your vehicle. Always replace an alternator that isn’t working properly before attempting to jump start a car.

Steven Hatman
Steven Hatman

We break down every information into easy-to-understand articles that cover all the categories anyone who owns a car needs to know about, such as oil , brakes , tires and etc. Our car guide is free and updated regularly for you to use as a resource, not only when you have an issue with your car but even before buying a new or used car! We also give tips on what to look for in each category or part of your vehicle.