Q: I put in a new battery. Alternator tested fine with meter. What else could it be? Battery light comes on again.

asked by on December 21, 2016

Battery tested at 12.6 volts not started. Started it, it tested at 14.30. Running most accessories it went down to 14.20. But my battery light comes on the first 5 minutes it runs and after 15 minutes of running the lights flicker. What else could it be?

My car has 166000 miles.
My car has an automatic transmission.

In order to know if the light is coming on for the alternator you will need to test at the alternator when the engine is at 2,000 rpms to see if voltage goes over 15 volts. If it does then the alternator needs replaced.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What others are asking

Manual clutch not engaging

If by the clutch not engaging you mean the pedal is going to the floor, you might be having slave cylinder issues. The slave cylinder is a hydraulic component that works off your clutch pedal. It disengages the clutch when...

The car turns off suddenly, no check engine light

Hi there. If the vehicle is just randomly turning off like this, it is almost always caused by a bad crank position sensor on this engine. This is very common and it will not turn on the Check Engine Light...

The check engine and o/d off lights are flashing ford escape

Hi Alex. Thanks for contacting us tonight. Loud engine noise is typically caused by a crack in the exhausts manifold or the exhaust pipe. This could also be the source of your check engine light, as typically when this happens,...

Car starts but then stalls

Since this issue did not present itself until after the replacement of the ignition switch, it most likely was created during the installation or reassembly process. In order to replace the ignition switch, the steering column needs to be lowered....

Car overheating, but fan still runs

Hi. Several things can cause that condition. A stuck closed thermostat, blocked radiator, a faulty water pump, or low coolant all need to be checked. The fans turning on is normal when the engine gets too hot. However, if the...

Alarm

Hello. I think you have a faulty alarm system. You may want to try to disconnect the alarm system and reconnect it to see if you are getting the same problem. I believe your lights and alarm system problems are...

Multiple leaks

All rubber components soaked in oil and swelling must be replaced. The leaking fluid seals will require extensive work to be replaced and should be done by a qualified professional. I recommend having a certified mechanic, such as one from...

Hard shifting transmission light comes on

Transmission issues like this can range from low transmission fluid to mechanical issues to electrical issues. Since the light has come on, the first step to take is to scan the vehicle for diagnostic troubleshooting codes. If a sensor, shift...

Power steering belt breaking

It appears that the power steering pulley has seized as a result of a failed power steering pump on your Ford Windstar. The burning smell is due to the belt rubbing against the non-moving pulley which creates heat and friction....

Related articles

The Best Used Cars to Buy for Dog Owners
Dog Dog owners are a special breed of drivers. When they shop for a used car they have a list of requirements that can be quite different from other drivers, which tends to make the process a bit of a...
How to Get Ford Dealership Certified
Ford car dealerships offer automotive technician jobs to mechanics who are certified through either the ASSET or the FACT program.
The Best Used Cars to Buy If You Need to Haul a Motocross Bike
Of Of course you would love to be able to ride your motocross bike everywhere, but the reality is, at some point you're going to need to transport it. A cargo van of almost any make or model would be...