Q: Will not stay started once jumper cables are removed. Loses power while driving

asked by on

car lose power while driving. Lights dimmed. Made it home, removed keys,dimmed headlights, radio still on. Would not restart without jump. Immediately after removing cable goes dead. Battery is charged. Alternator one year old.

My car has 130000 miles.
My car has an automatic transmission.

If you can keep the engine running when the jumper cable is connected, and it stalls as soon as the jumper is removed, this means the battery is bad or its connections are bad on the clamps and the alternator is not charging. It would stay running if the alternator was charging. Make sure all the main fuses are good. They can get blown if jumped backwards. If you want to have this looked at, a technician from YourMechanic can inspect your starting issue and let you know what needs repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Will not stay started once jumper cables are removed. Loses power while driving

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: What are the seat belt locking modes?

While you might think that your seat belts are only designed to work in one way, they actually have two locking modes. The driver front seat only works in what’s called “vehicle sensitive mode”, but the front passenger and all...

Q: Van started fine, drove to destination, turned it off. 30 minutes later, wouldn't start.

It's very possible for the ignition coil to suddenly fail, it happens quite frequently to many vehicles. It is strange that it failed after being parked, but certainly not impossible. There are also several other possible causes of the car...

Q: Serpentine belt problem

Hello. The most common serpentine belt issue on this engine is noise. It is typically a squealing noise caused by a bad belt tensioner. I typically remove the belt and spin each pulley to listen for the noise and replace...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.