Q: Q: Battery light on

asked by on

The other day one of my heater hoses broke from the connecter, spilling all the antifreeze all over , I replaced that , but now I'm having problems with the battery charging light coming on, I already replaced the battery and alternator, and old alternator tests pass, but when I tested it with the outside machine , it said voltage regulator failed, any suggestions? I asked all the guys at work , they don't even know smh.. help me

My car has 650000 miles.
My car has an automatic transmission.

Hello. If you continue to have a low voltage issue with the new alternator then there may be a circuit issue. Most of the time, if the alternator is good, it is the battery cables or there is an issue with the amp sensor on the battery cable. Most of the time it is a failure in the battery cables themselves. I usually do a voltage drop test on the battery cables first to see if they are bad. I replace them if they fail the test. If the cables are fine then I test the amp sensor which is the second most common cause of this. One of those two should be the problem. If you want to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the battery light firsthand and help you make the necessary repairs.

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 on

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: Why won't my 2004 Audi A6 Quattro charge brand new battery??

Hello. Most of the time the issue is in the wire coming from the battery to the alternator. This small wire has a tendency to fail and have high resistance. This needs to be checked first. If that is not...

Q: every few days i have to jump start my car

Hello. Yes a bad starter could cause a car to need a jump start every few days. Additional power provided by an extra battery could be enough to get a weakening started going again. Your vehicle may have a battery...

Q: There's no milky residue on my oil cap or my dipstick but there's oil in my radiator I know I have a bad spark plug wire.

Hi there. A bad spark plug wire would not allow engine oil into the cooling system. The possibility of a bad head gasket, could allow engine oil into the cooling system. Assuming the engine has not been overheated, electrolysis could...

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.