Can a car battery show good but be bad?
As long as battery voltage remains above 9.6 volts, the battery is considered “good.” But if it drops below 9.6 volts by the end of the test, the battery may be “bad,” or the battery may have to be recharged and retested if it was not fully charged prior to the test.
Can a battery have good voltage but still be bad?
Sure. It could be showing a voltage higher than 12 volts and still be bad. If it is bad it will die or drop significantly when put under load. Battery testers don’t just measure voltage.
Why does my car not start after I drain the battery?
A broken timing belt, timing chain or timing gear means you can crank the engine until you drain the battery, and it still won’t start. Likewise, a bad crankshaft position sensor won’t send the right signals to the engine computer to allow the engine to start. 8. Smart Key Issue
How can I tell if my car battery is good?
If you don’t have a battery tester, you can still see if the battery is good by jump-starting the car. Drive or run your car for about an hour or so, turn it off, and then restart it. If it starts, the battery is good. If it doesn’t and you need to jumpstart it again, drive it to the nearest automotive store and buy a new battery.
Why does my Mercedes not start when I charge the battery?
This Mercedes-Benz is not starting because of a low battery. In this case, what you need to do is trickle charge your battery using any of these 12 volt battery trickle chargers. If you need help read this article on How to charge a Mercedes-Benz the right way. Mercedes won’t start, and it’s not the battery.
What does it mean when your engine won’t start?
Sometimes, the starter motor won’t produce any sounds, not even a click, when you try to start the engine. This could mean the pinion gear got stuck at the flywheel ring gear. With a manual transmission, it’s easier to verify this. Set the transmission to gear and rock the vehicle a few times. Then try to start the engine.