Q: Q: Battery light

asked by on

I have a rebuilt transmission, new altinator and battery but when I start the car it starts right up. But when it's on the battery light comes on i dont know what else to do or what can be causing the light to still come on
My car has an automatic transmission.

Hello. This may be caused by a faulty ground connection or potentially a bad voltage regulator. Try checking to be sure you have a good connection from the battery to the car’s chassis (black negative battery cable from the battery to the chassis). The voltage regulator is a unit that is responsible for regulating the voltage charge from the alternator to the battery. When this is not working properly, it can undercharge or overcharge the battery causing the battery light to come on. I would recommend having an expert from YourMechanic come to your home to diagnose and test your voltage regulator.

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. Q: Battery light

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: Where is the solenoid purge valve located in a 2012 Chevrolet Captiva Sport?

Hi there. The purge solenoid valve is typically located on the passenger side of the vehicle, under the hood and attached to the firewall. In order to locate yours and to review the correct removal and installation procedures, I would...

Q: When I try to stop in a short distance at highway speeds, my car jerks just before coming to a complete stop.

Based on your description, it seems like you may have a faulty control arm bushing on your vehicle. I would recommend a brakes suspension and steering inspection to verify this. If any control arm bushings are faulty on your vehicle,...

Q: I have a 2004 Dodge Durango that cranks up like it's out of gas I replaced the fuel relay fuse. My question is does it have a rese

You should listen to fuel tank when someone cycles the key on and off to see if you hear the pump run? Then see if you hear relay click on and off doing the same thing. If you do not...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...
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.