Can a 12-volt battery show 12 volts and still be bad?

Yes it can be bad if it’s output is 12 volts with no load and the engine not running… Load it down and watch the voltage drop… The starter is a good load to use for measuring the output under load.. Even a new battery voltage will drop with the starter running, but the battery should easily crank the car….

Can a bad battery reads 12 volts?

A bad battery could very well produce 12+volts without a load. Rather it is voltage under a load that is important. If the battery is bad, then you would notice the lights going REALLY dim when you try to start the car.

Is the 12.4 volt car battery an okay battery?

12.4 volts for a lead acid starter battery is not bad, but not great either. A fully charged car battery should read around 12.6 volts, but immediately after chargjng can show up to about 13.3volts, which will drop back to the “charged and rested” voltage of 12.6v.

What should my battery voltage be for a load test?

For your battery to pass a load test, the multimeter must read between 9.5 to 10.5 volts straight for 30 seconds when the battery is tested. Any reading of voltage below 9.5 volts, or if the battery holds a good record for a while and steadily drops, or even when it falls instantly to 0 volts,…

What should the voltage be on a 12 volt battery?

If it reads 12.6 volts, the battery is just attaining a fully charged state. But when it reads 12.4 volts, the battery has attained a 75% charge level, and it could still be charged further, there would be no danger.

Why is my 12 volt battery not working?

The fuse or circuit breaker is often the cause—and you can save a lot of time by checking them first. The cause of your problem is most likely saltwater corrosion. Something is preventing the electrons from flowing through the wire, the same as if you parked your car on the garden hose or it broke or became blocked.

Can a 12 volt battery show 12 volts and still be bad?

Can a battery be cranked at 12.8 volts?

Yes, I have done the free power mod. voltage doesn’t tell you anything. only a load test will tell you if it’s any good. it doesn’t pass the test for the load your starter is putting on it. +1 what Eddie said. If you have a fully charged battery and it drops below 9V while cranking it is toast. 12.8V is not good for a fully charged battery either.

What does no start no crank no click mean?

If you have a late model GM vehicle and turn the key only to hear nothing, you’ll most likely think you have a dead battery—and you may. But a no start, no crank, no click condition can be far more involved than that. In the old days, power flowed through the ignition switch and down to the starter solenoid. Not anymore.

What should battery voltage be with engine off?

A fully charged battery should read 12.6 volts with the engine off. The reading of 12.1 means the battery is run down a bit or is bad.

What does it mean when Battery says 12 volts?

Lately I have been having cranking issues. The battery is fully charged, but when I go to crank it, it cranks extremely slowly, then the steady clicking sound of a dead battery. Voltage drops significantly during cranking, but then reads 12 volts when the key is off.

Can a 12.3 volt battery still work?

I too vote with the majority on this one. 12.3 volts is weak, but still should work. It sounds like there is a issue elsewhere that needs to be addressed first. I would get the offending system that is causing the abs light/red triangle etc. to come on fixed, then consider whether or not I want to invest in a new 12 volt.

What causes a car to have a no start condition?

The battery or battery problems are the number-one cause of this type of no-start condition. A quick way to check your battery is to turn your headlights on. If the headlights come on and are nice and bright, not dim or dull, then it’s likely your battery and its connections are okay.

Is the 12.3v at the battery terminals low enough to cause problems?

Pushing start button => can only go from Park-Neutral. Same after removing 12v ground from battery & replacing, but 12v.battery at terminals, car OFF reads 12.3v which is about half charge, for what should be a fully charged battery. Is that low enough to cause problems (so it’s the 12v, not the hybrid battery?)

How many volts should a battery drop starting?

Voltage drop on the ground side of the starter circuit should be no more than 0.2 volts. But some manufacturers will take a voltage drop reading between 0.2 and 0.6 as acceptable for the ground side of the starter circuit. If you get a higher voltage drop reading, check the starter motor’s mounting bolts for tightness.

What should the voltage drop be on a car starter?

Either post type, crank the engine. Should get less that 0.1 volts. Test the negative circuit with your voltmeter from the battery negative post to the engine block and crank the engine. Should get less than 0.5 volts, but really around 0.2 to 0.3 volts is normal.

Why does the battery gauge go back to 12 volts?

When your gauge read ~12volts and a new battery it went back to 15 volts, the old battery was overloading the alternator with an internal short. At one time I had a battery short bring it down to 9 volts and the computer went nuts. The engine back fired I just made it to a battery shop.

What should the charge voltage be on an alternator?

Turn on the high beams for 10 seconds and then turn them off. Measure battery voltage across the battery posts with your DMM. You should get between 12.4 and 12.6V. This means your battery is fully charged. If you get a reading below 12.4V, charge the battery before continuing. 5b. Measure the Charging System’s No-Load Voltage

Why do I get Low voltage on my starter battery?

You found pressure (voltage) bypassing the battery’s insulated plastic case through your meter. If your battery is really dirty and wet, try moving around one of the leads on the battery’s surface with the other lead still attached to either battery post. You will likely see very, very small voltage. Why?

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