Q: Replaced alternator but still not sending power to the battery.

asked by on September 19, 2016

I replaced my alternator. Afterwards, car cranks but battery still receiving power from the battery. Had alternator tested and it passed. And recently when I try to crank it, it doesn't fire up, just spins.

My car has 195000 miles.
My car has an automatic transmission.

Battery Replacement $200.97 - $319.07 Get a Quote
Alternator Replacement $149.30 - $1391.75 Get a Quote
Loss of power Inspection $79.99 - $89.99 Get a Quote

Hello. If your engine is able to crank all the time and will not just start, the issue is not in the battery or the alternator. A good battery charge is required in order to even get the starter to turn the engine over. After the starter turns the engine over, the fuel starts getting introduced into the engine and the spark plugs start firing. Therefore, in this particular circumstance, I believe you have a fuel or an ignition issue. I would recommend enlisting the assistance of a qualified technician to to a fuel pressure test and an ignition test on your vehicle to determine if the fuel pressure is within specification and if the spark plugs are actually firing. If either of these are not the case, you have an ignition of fuel issue that needs to be resolved. For a more in-depth diagnose, consider having a certified technician, like one from YourMechanic, diagnose your vehicle’s loss of power to have this corrected.

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

New battery drained of power in one week

If the battery is new and charging system output has been measured and is within specifications, the only reason a battery will discharge is if the car sits for a long period of time (batteries will self-discharge even if not...

Has new alternator, new battery when started , motor dies when battery is disconnected...my mechanics are stumped on this

Hello. If replacing those particular components did not correct the issue then the next thing I would look at is the vehicle's voltage regulator. It appears that this engine's electrical system is equipped with an external voltage regulator that functions,...

Battery light on; belt noise

When the Battery Light on the dashboard illuminates, usually there is an issue with the alternators performance. The alternator is the device that maintains the batteries charge during vehicle use. If the belt is too loose, it can slip causing...

Battery is dead and engine doesn't crank

Hello! I'll be happy to assist you. I believe the issue may be the ignition key tumbler. The wires inside of the steering column connecting to the ignition key tumbler to the steering column tend to break. The wiring may...

Car won't start

Hi there. Check the three essentials that an engine needs to run. Air, Fuel, and Spark. If you have fuel and the fuel pump is working, then check the air filter and see if its plugged up. If the air...

I believe one of my ignition coils is bad, how can I test to see which one is bad?

The only way to determine exactly which ignition coil is damaged is to have a professional mechanic complete a diagnostic scan and download all error codes. The OBD-II error codes will pinpoint the source of engine issues. Having a mechanic...

Alternator glowing red hot. The engine don't rev up in drive, but revs up fine in park. Whats going on?

Hi there. What happened is the voltage regulator in the alternator failed. The battery died due to the alternator not putting the voltage back into the battery, but instead it cooked the battery with a higher voltage than the battery...

Battery light on; belt noise

When the Battery Light on the dashboard illuminates, usually there is an issue with the alternators performance. The alternator is the device that maintains the batteries charge during vehicle use. If the belt is too loose, it can slip causing...

When my alternator went out, could it have killed my battery?

Hello, thank you for writing in. The symptoms you are having are classic of a failing alternator. While the battery can be damaged and fail due to the vehicle relying solely on it for power while running, you will want...

Related articles

How Can I Prevent My Car Battery From Dying?
Your Your car battery is one of the most important parts of your car’s electrical system. Without the battery, your car simply isn’t going to work. Your battery works hard, and eventually, it’s going to wear out. So, how long...
Symptoms of a Bad or Failing Auxiliary Battery
If you have multiple batteries in your vehicle, you may have to replace one if the vehicle won't crank, fluid is leaking, or the Battery Light is on.
How Long Does an Auxiliary Battery Last?
When When a dual battery system is added to a vehicle, it is usually because accessories have been added to the vehicle that are not factory-standard, and the primary battery in the vehicle does not deliver sufficient power to drive...