Can a battery show 12 volts but still be bad?
Can a battery show 12 volts but 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 12V battery be used as a starter?
Like this one http://www.etrailer.com/static/images/pics/D/W/DW00254_2_1000.jpg Connections should be pristine. A battery can read 12 VDC, even 13+ VDC and however have not enough amps for the strong twist the starter demands, or just too weak to maintain the charge for a starter.
Why does my car battery not read 12V?
If so, you can measure its density with a hydrometer, a few $. Maybe the terminals need to be cleaned. Maybe a battery cable has broken. Maybe the alternator isn’t working and it isn’t getting a charge. Before you buy a new battery, take it in for a test. Even Walmart auto shops do this free.
What is the voltage as you trigger the starter?
12.4v is a bit low for a good battery though – should really be 12.7v, so might be that one of the cells is on the way out which of course won’t help. What is the voltage as you trigger the starter? My battery was doing the same when I had a dodgy cell. Sure its not the starter or the wiring rather than the battery?
Can a 12.4v battery still show 12V?
As said. 12.4v is a bit on the low side for a healthy battery. A battery can still show 12-13volts but have no CCA (cold cranking amps) which is the power it has to turn the starter. If you can get it to a motorfactor and get them to test it, they can show you the CCA. No!
Why does my battery only show 12.4v?
12.4v is a bit low for a good battery though – should really be 12.7v, so might be that one of the cells is on the way out which of course won’t help. I see what you mean, basically a dodgy terminal connection could still show 12v at the starter but can’t deliver the ‘ampage’ when put under load?
12.4v is a bit low for a good battery though – should really be 12.7v, so might be that one of the cells is on the way out which of course won’t help. What is the voltage as you trigger the starter? My battery was doing the same when I had a dodgy cell. Sure its not the starter or the wiring rather than the battery?
Like this one http://www.etrailer.com/static/images/pics/D/W/DW00254_2_1000.jpg Connections should be pristine. A battery can read 12 VDC, even 13+ VDC and however have not enough amps for the strong twist the starter demands, or just too weak to maintain the charge for a starter.
What should the voltage be for a car battery to start?
Check the voltage when cranking the engine, if it drops below 10 or 11 volts the battery probably needs replacing. Also check the voltage when it is running, it should be 14 volts or more. If it is not then the alternator is not charging. You can’t post conmments that contain an email address.
