How To Set Voltage Meter To Test Car Battery. Red first then black. With the headlights on at 80F there should be a voltage drop of at least 118 volts 25 charged and ideally 125 volts between the positive and negative terminals.
The wavy line after a V is AC alternating current voltage and is. Set the dial to 20 which will allow you to accurately measure between 0-20 Volts. After doing this set the dial to 20 volts so you will be able to measure 0-20 volts.
Set the voltmeter to the lowest voltage setting thats above 15 volts.
Your car battery is necessary to propel the starter motor and get the engine revved up. The temperature outside affects the voltage of the battery. Now come to do it piratically. DC voltage is usually marked as a V followed by a short line with a dotted line beneath it.
