Serviceautosrepair.com - Does your lead-acid accumulator contain enough power to start out your engine throughout weather condition. the sole thanks to recognize if your battery is absolutely charged or not is to live the battery's state of charge with a meter. you'll be able to use associate degree analog or electronic voltmeter, however a digital meter is less complicated to browse and can provide you with a a lot of correct reading.
How to Check a Car Battery and Charging System ( Alternator )
- First, confirm the key is OFF, and every one the vehicle's lights square measure OFF.
- To check your battery's state of charge, connect the RED or POSITIVE meter check result in your battery POSITIVE terminal. The positive terminal are marked with a and image (+), and also the battery cable that's connected to the positive terminal is usually color coded RED.
- Connect the BLACK or NEGATIVE meter check result in your battery NEGATIVE terminal. The negative terminal are marked with a minus image (-), and also the battery cable that's connected to the negative terminal is usually color coded BLACK.
Note the reading on your meter and seek advice from the chart below:
Battery Voltage and State of Charge:
- 12.66v . . . . . . . . . . 100%
- 12.45v . . . . . . . . . . 75%
- 12.24v . . . . . . . . . . 50%
- 12.06v . . . . . . . . . . 25%
- 11.89v . . . . . . . . . . 0%
(NOTE: these readings square measure at eighty degrees F. Battery voltage readings can drop with temperature roughly zero.01 volts for each ten degrees F.)
(At thirty degrees F. a completely charged battery can live regarding twelve.588 volts, and at zero degrees F it'll live regarding twelve.516 volts.)
Check Your Battery once Charging It or Jump beginning Your automotive
- Make sure that your automotive is idleness.
- Connect the positive lead of your meter to the positive terminal on your battery. Attach the negative meter result in the negative terminal.
- Read the meter.
- A practical charging system ought to turn out between13.5 and 14.5 or a lot of volts whereas idleness.
- A voltage of less than 13.5 your generator is not manufacturing enough current to charge the battery. Purchase a brand new alternator at your native motor vehicle elements store or take your automotive to a mechanic.
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