Skip the auto shop - Our mechanics make house calls

Q: What's wrong when the alternator is not charging the battery, both parts are new, car Will go dead after driving 20 mins

asked by on

Car have new starter, battery, and alternator, the car cut off after 20 mins,it's no power going from the alternator to the battery, what can that be

My car has 179000 miles.
My car has an automatic transmission.

Your vehicle has a fusible link in the wire harness that goes from the main wire on the alternator to the starter. If you had the starter replaced then maybe the wire was not put on the starter.

The fusible link acts like a fuse, but also looks like a wire in the harness. Check if this wire is connected to the starter and that it’s not burnt in two. Sometimes the fusible link wire will burn in two but the wire outside cover stays intact. You have to pull on the wire to tell if it is burnt. I’d recommend having a mechanic diagnose your vehicle in order to fix your batter/alternator issue accurately.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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. What's wrong when the alternator is not charging the battery, both parts are new, car Will go dead after driving 20 mins

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: When my car is idling at a stop sign, I have a rattle coming from the front right.

Hi there, thanks for writing in. If the noise is there even when the engine is running, then the balancer needs to be checked as well as the engine mounts. Either one of these will cause this to occur. I...

Q: Wheel studs breaking off when changing tire

Hey there: Thanks for writing in to YourMechanic.com. Breaking a wheel stud is commonly not caused by the way you're removing them, or the tool you are using. Lug nuts are supposed to go onto a stud smoothly, and come...

Q: Driving, then engine/oil light turns on, steering locks up, car dies; but just fine after turning off than on.

Any time loss of steering, or power assist to the steering is lost, it can be a safety issue and should be looked into as soon as possible. If the oil light and/or check engine light are flashing before it...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...