Q: Alternator not working right

asked by on

The alternator isn't working right.

An alternator can malfunction in a lot of ways. It can provide too much or too little voltage, not enough current, no current or the wrong kind of current. The wrong kind would be AC voltage instead of DC. Once several basic checks are done, replacing the alternator is justified. It needs a “turn on” command from the computer. The belt and the battery wire connected to it needs to be checked. A qualified mechanic from YourMechanic can come out and diagnose your battery and alternator if you need further assistance.

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. Alternator not working right

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: Can you help? My car stopped starting.

Hi there. Check the spark plugs and wires to see if the engine is getting any spark to the cylinders. If there is no spark and the spark plugs are white in color, then I recommend replacing the spark plugs...

Q: Vehicle randomly won't start

You may have gotten a bad battery but I think the system in your vehicle is draining the battery and not recharging it. The alternator is the most common cause of this, or you have something staying on after you...

Q: I had a new rear brake sensor installed. The braking lights still come on intermittently.

Check all of the sensors and switches on the brake system and make sure all of them are connected properly. Make sure that all of the connections are clean and have no bent or broken pins. The brake warning light...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...