Can You Jumpstart A Car With A Bad Alternator?

So really, can you jumpstart a car with a bad alternator? Well, we will find out in this article discussing whether it is possible to jumpstart a car with a bad alternator and how to start car with bad alternator. If you’ve ever had or experienced a vehicle stop and refusal to start using your car keys due to a dead car battery, then probably would have you turned or resulted to trying jumpstarting your car battery as a solution to get your car running again.

how to start car with bad alternator

But what happens when your car’s alternator is bad? Can you still jumpstart the car and get it moving with a damaged or bad alternator? Or is it a totally lost cause?  Well, you see, the alternator plays a critical role in charging your car’s battery while the engine is running, and without it, your car’s electrical system may not function properly. And that is why,  in this article, we talk to address the question of whether or not you can jumpstart a car with a bad alternator, the potential risks involved, and what to do if you find yourself in this situation.

how to start car with bad alternator

can you jumpstart a car with a bad alternator

Yes, for sure you can definitely jumpstart your car with a bad alternator, and that is because the main role an alternator plays in a vehicle is to charge the car battery while the engine is running, so even with a bad alternator, it may still be possible to jumpstart a car using power from the battery reserve. So if your can battery has not fully drained or maybe you got a new battery that is still fully charged, then can jump-start with the remaining life.

However, you should have in mind that jumpstarting a car with a bad alternator should only be considered a temporary solution, so you should endeavor to fix or repair the alternator as soon as you can;  this will help you avoid damage to your car’s electrical system and even abrupt stop of your car on the middle of now were.

Additional reasons why you can jumpstart a car with a bad alternator are as follows:

Here’s how the primary function of an alternator ties in with why it may be possible to jumpstart a car even with an inoperable alternator:

Alternator not operating fully: one the other reasons why you can still jumpstart a vehicle even with a bad alternator is probably when the alternator is not totally damaged. So even the alternation is not producing or performing at its full potential or capacity, the alternator may still generate some electrical current or electricityto your car engine. So even when starting your vehicle using jump-starting technic, this alternator may still provide some level of electricity which helps power its electrical systems for a short duration and keeps things going for a while.

You don’t use your Car regularly: if your car is not used regularly the chances are that the car battery may still have or retain some charge from before when the alternator was working properly. So in this case, if you were to jumping-start the car, the remaining charge will provide the needed power to start the engine and keep the vehicle running for while.

Your car’s battery is new: If your battery is freshly changed, new, and fully charged, then simply it definitely has enough energy to start and keep the car running during an alternator failure for some time.

Remember that, jumpstarting a car only serve as a temporary fix, while we seek the solution to the damaged or bad alternator in other to prevent further harm to your car’s electrical parts.

Related: Causes and Fix for Alternator Not Charging Battery but Alternator is Good Issue

can you jumpstart a car with a bad alternator

Risks for jumpstarting a car with a bad alternator

When Jumpstarting your car with a bad alternator, you may want to keep in mind some of the following potential risks that it may  pose to you:

  1. Battery Damage:  the car battery is what is used when jumpstarting a car, and the battery will be used to power the car’s electrical system, and so if this is done repeatedly, you are simply damaging the reducing the overall lifespan of the battery, which kills the battery after some time.
  2. Safety risks: If your alternator is bad and you decide to jumpstart the car with a leftover car battery charge, what then happens when you run out of battery? Well, I am sure you know the answer. It means your car can shoot down in the middle of the road, leading to an accident.  And let’s say your alternator fails while you are driving, it can cause the car’s electrical systems, like the power steering wheels and braking system, to shutdown in the middle of the road and can cause road accidents putting your life, and that of the others at risk.
  • Incomplete charging of the battery: When the alternator is bad or not working correctly, the battery may not be fully charged even continue charging after jumpstarting the car. This will means that the car will only run for a short period of time before your car battery runs out of power again.

How to start car with bad alternator

Here is a guide on how to start car with bad alternator:

How to start car with a bad alternator when the battery is dead:

So let’s say, for instance, that your car refuses to start due to a dead battery caused by a bad alternator; you’ll need to jump-start it, and to do this you will need to have a set of jumper cables and another running vehicle oranother life battery.

Step-by-step jump-starting process:

  • You have to start by parking the running vehicle close to the one with the bad or damaged alternator, but do not let them touch.
  • Now turn both vehicles off and ensure that all vehicle accessories (like headlights, radio, etc.) are also offfor both cars.
  • Connect one end of the red (positive) jumper cable of the life car battery to the positive terminal of the dead car battery and the other end to the positive terminal of the working battery.
  • Now Connect one end of the black (negative) jumper cable to the negative terminal of the working or lifebattery and the other end to an unpainted metal surface on the vehicle with the bad alternator (preferably the engine block, but not the battery).
  • Next, you have to start the life vehicle and let it idle for a few minutes to charge the dead battery.
  • Now you can Attempt to start the vehicle with the bad alternator. If it starts, disconnect the jumper cables in reverse order, and let the car run to charge the battery slightly.

Here’s the correct reverse order for disconnecting the jumper cables:

  • Disconnect the black (negative) cable from the unpainted metal surface (engine block or chassis) on the vehicle with the bad alternator.
  • Disconnect the other end of the black (negative) cable from the negative terminal of the working (life) battery.
  • Disconnect the red (positive) cable from the positive terminal of the working (life) battery.
  • Finally, disconnect the other end of the red (positive) cable from the positive terminal of the dead car battery.

By following this order, you minimize the risk of electrical shorts and sparks, ensuring your safety.

how to start car with bad alternator

What to do next after a car with a bad alternator is jumpstarted.

  1. Drive to a repair shop: If the car is started, you should drive it directly to a repair shop and avoid using any unnecessary electrical accessories while in this process, as they will put more strain on the battery. Have in mind that the battery may only a little while, so make that the repair shop is very close to where you jumpstarted the car.
  • Replace the alternator: next here is to have a mechanic diagnose and replace the bad and faulty alternator. As I said earlier driving with a bad alternator can lead to further damage and may leave you stranded with a dead battery in the middle of now where.

At best, jumpstarting a car with a bad alternator should only ever be considered as a temporary solution. Repeated jumpstarting may cause additional damage to both the battery and alternator, leading to expensive repairs later down the line. When your alternator breaks, it must get repaired immediately to protect against any form of safety risks as well as any further deterioration to the vehicle’s electrical system – in any car-related issue; it’s always wise to consult an expert mechanic for advice or repairs; taking proactive measures against bad alternators can ensure your vehicle remains reliable on the road.

I hope this article on how to start car with bad alternator and has address the question, “can you jumpstart a car with a bad alternator”

Please take a moment to share this article. 

Sharing is caring!

Scroll to Top