Q: Alternator Replace but Battery Indicator Light Remains Dim

asked by on

I recently had a mechanic come to my home (this Thursday at 11am) to replace the alternator. I have already been towed twice this week because my battery died. After he replaced the alternator everything seems to be working properly except that now my battery indicator light is back on (although dim) along with my check engine light. I'm worried I'll have to be towed again so I haven't driven my car since. Can you provide any advice or assistance?

My car has 165000 miles.
My car has an automatic transmission.

This may suggest a failing voltage regulator. The voltage regulator is a unit that regulates the charging of the battery by the alternator. When the voltage regulator is not working properly, this may result in the alternator allowing too much power to be delivered to the battery resulting in damaging wires and prematurely sometimes destroying the battery. A common sign of this is usually the acid inside the battery boiling causing the battery to swell. In other cases it may result in the alternator not supplying enough power to the battery, resulting in undercharging the battery or not charging it at all. I would recommend having an expert from YourMechanic come to your location to diagnose your vehicle’s charging system.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Alternator Replace but Battery Indicator Light Remains Dim

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: Car got hot now turns over but act like no compression an blows starter relay

Hello there, this sounds like there may be a few different issues going on. The starter relay or fuse will only blow if the starter is drawing too much power, or if there is a short to power. Likely causes...

Q: Q: Charging system warning light.

This may be a sign of a weak battery, a failing voltage regulator or failing alternator. As you may know, the alternator is responsible for charging the battery while the engine runs by generating amperage and recharging the battery while...

Q: Do I need to replace valve lifters after having the cylinder head rebuilt on my 2001 Toyota Camry

Hi there. When you have the cylinder head rebuilt and a valve job done then that will change the height of the valves in the head. The lifters are set a specific thickness to offset the depth that the valves...

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 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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.