Skip the auto shop - Our mechanics make house calls

Q: Battery light on; belt noise

asked by on

The battery light is on. I think the battery is not charging. And there is a belt noise when starting the car. I think it's either a loose belt or the alternator seized or is bad.

A: When the Battery Light on the dashboard ill...

When the Battery Light on the dashboard illuminates, usually there is an issue with the alternators performance. The alternator is the device that maintains the batteries charge during vehicle use. If the belt is too loose, it can slip causing noise. Also, a slipping belt cannot spin the alternator properly and causes it to appear to be malfunctioning when the belt just isn't tight enough. Have an experienced technician inspect the drive belt system and test the vehicle's battery in order to make the necessary repairs.

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: lose power then engine starts running rough. i have to turn truck off then restart it

When looking into this problem that you have I came across a possible fault with the power train control module (PCM) causing different throttle sensor codes. A technical service bulletin identified the part number and date ranges for your PCM....

Q: Cooling fan not shutting off.

There are many vehicles today where it is normal for the cooling fan to run for a few minutes after the engine has been turned off. It is especially long running and will be more noticeable on really hot days...

Q: No fuel pressure; vehicle cranks but doesn't start.

Hi, this comes up often. The most common cause of this is the fuel pump failing. I have also had the control computer fail as well as the fuel pump relay. A mechanic would start by checking for voltage at...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...