Skip the auto shop - Our mechanics make house calls

Q: Battery new Not charging. Suspect alt

asked by on

What is the best diagnostic procedure

My car has 100000 miles.
My car has an automatic transmission.

A: You need to have the alternator checked and...

You need to have the alternator checked and then the battery. Sometimes the alternator charges fine but the cable between the alternator and battery is bad. If so, it will not charge the battery. The cable from the alternator and battery has a built in fuse that may blow out form improper jump starting or a shorted battery. You should have the vehicle checked by a certified mechanic, like one from YourMechanic, to diagnose your dead battery and help you fix it from there.

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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Transmission lights no gears

Hello. Your BMW 745Li has a shutdown feature which helps to prevent additional damage to other components of the car when there is a problem with the engine and/or transmission. Using the information that you have provided, it sounds like...

Q: I have been hearing a clacking sounds whenever I go over bumps.

It sounds like the sway bar's (anti-roll bar) links and bushings in your suspension have too much play in them. These are often the cause of noise when you go over bumps. Since your shocks are new we are going...

Q: Rough idle in cold weather.

Rough Idle could be caused by many things and is hard to diagnose. BMW have a known issue with the vanos solenoid that causes this problem. I would have the car checked for codes and have a technician troubleshoot the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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.