Car Battery Voltage Reading

If it is above 03 volts touch the positive wire connection from the alternator to see if there is a change. While driving this voltage should be between 137 and 147 volts.

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125V or higher.

. A good car battery should read 124-129 volts when the car is off. Connect a digital voltmeter to the positive and negative - battery terminals then start your engine. If there is a significant change it means the lead needs to be cleaned to ensure smooth floe of current otherwise the connections are okay.

Check to see the reading and if it is over 129 volts your battery may have excessive voltage. If youve recently been for a drive and as long as the charging system is working correctly the battery is likely to give a higher reading than the resting. If there is NO change in the voltage reading your charging system is malfunctioning and is not charging the battery.

Most car alternators that normally recharge your battery after every start and provide power while the engine is running are normally voltage regulated to about 138 to 140 volts. 2009 CTS 36 DI Joined May 17 2013 15 Posts. Your battery has a sufficient charge.

But if the battery reads over 15 volts or less than 13 volts then there might be a problem with the voltage regulator the wiring or the alternator. Modern cars are very demanding from an electrical perspective even when theyre not being used. Your battery is charged about 75.

Check the battery reading to be below 03volts. Up to this voltage and at normal temperatures the battery will only gas very slightly. 1175-1189 volts means your battery is dead.

Can you check battery voltage without multimeter. Your cars electrical system may have drained it or there may be an issue with your alternator. A car battery should be replaced below at that voltage.

Discussion Starter 1 May 29 2013. Anything lower doesnt necessarily mean the battery is bad. A good healthy car battery should have no fewer than 126 volts.

The ideal car battery voltage with the engine running is between 137 and 147V. You may need a new alternator. 126 to 128 is the ideal voltage level for your battery.

A fully charged battery will typically display a voltmeter reading of about 126 to 128 volts. If your car battery gauge shows 18 volts this might be an issue in your car alternator. The ideal car battery voltage with the engine running is between 137 and 147V.

A healthy car battery should register about 126 volts. If the battery isnt fully charged it will diminish to 124V at 75 12V when its only operating at 25 and down to 119V when its completely discharged. If the voltage isnt within spec perform a voltage drop test to determine the condition of the terminalpost connection.

Computers cant operate at voltages of 96 or lower. If you dont have a multimeter to tell you the voltage of your battery you can do a test of your electrical system by starting the car and turning on the headlights. Car battery gauge at 18.

So to answer your question Yes 15 volts is too high. 118V or lower. It should read close to 126 volts when the car is off.

A fully charged automobile battery should be 126 volts. To be more specific. The voltage reading should jump up to 135 to 145 volts if the charging system is working.

Jump to Latest Follow 1 - 4 of 4 Posts. What should my battery voltage read while driving. A good battery should be between 124 to 126v at rest it will drop some if any accesories are on lights radio phone or gps chargers flashers etc if you have an automotive voltageamperage tester available you can do a load test on the battery hook it up and load it by 12 the cca rating of the battery for 15 seconds if it drops below 10v its time for a new battery.

Fully-charged most car batteries will measure at least 126 volts 130-132V for OPTIMA YELLOWTOPs but low voltage doesnt necessarily equal a bad battery. Your car battery is charged about 25 or less. Therefore if you read less than 126 or you read too much higher than 128 on the battery gauge this means your car battery is not in good shape.

With the engine off you should get a reading of 126 volts. With the engine off you should get a reading of 126 volts. When the engine is running this measurement should be 137 to 147 volts.

Its important that you test the battery after its been sitting for at least an hour to get whats called the resting voltage. The battery gauge always displays the current-voltage of your car battery. At about 80 degrees a fully charged battery will be around 125-126 volts.

1245-1254 volts means you have a 75 charge 1224-1229 is 50 charged and 1199-1206 volts is 25 charged. If the voltmeter reads between 14-15 volts then the battery is normal. Because of the way lead-acid batteries discharge its important that you test the battery after its been sitting for a period of time to get whats called the resting voltage.

Fully charged automotive batteries should measure at 126 volts or above. A fully charged battery ideally measures at 1266 volts and above but 126 volts at 80 degrees 12588 degrees at 30 degrees and 12516 volts at 0 degrees are acceptable readings. When a voltmeter shows a low voltage reading it indicates that the chemical reaction of the battery isnt up to the mark.

Leave the car overnight preferably longer and test before you start the car in the morning to get an accurate gauge of the batterys health. Up to 8 cash back A reading of 1265-1277 volts means your battery has a full charge. Anything lower than that is a completely different set of problems.

If the battery isnt fully charged it will diminish to 124V at 75 12V when its only operating at 25 and down to 119V when its completely discharged. Any voltage above 129 volts is a good. Your cars electrical system can be tested by starting it and turning on the headlights if you do not have a multimeter to determine the battery voltage.

If your voltmeter is showing a voltage anywhere between 124 and 128 that means your battery is in good shape. Car Battery voltage reading 118 when off is this bad. Car battery voltage must be above 122 volts to operate properly.

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