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: 2007 Silverado - "Reduced Engine Power"

Hi there: Without being there, it's difficult to give you an idea as to what might be causing the 'chirping' noise or the Reduced Engine Power light. However, anytime you have an error or warning light come on and you...

Q: Coolant circulation issues Impala LS 3.8L.

Hi Adrian. Thanks for contacting us today. Typically, when a water pump goes bad, it's the inner seals that fail, which leads to bearing failure and overall water pump failure. This will produce a slow leak of coolant. This video...

Q: Turn Signal, cruise, brakes, and emergency flashers not working properly.

If you have already replaced the flasher module for the turn signals, your problem may be in the switch assembly whether it is a shorted circuit or the contacts in the switch not making a proper connection and causing problems...

Related articles

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...
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...
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.