How do you connect a volt meter to a car to check current draw?

Voltage is usually measured parrarel with load or Battery. How ever , you can take the negative cable off , making sure all accesories are off , and conect one lead to cable and one end to to negative battery post. if very low reading, then this is normal because if car have computer it powers, digital clocks ,digital lights on rasdio..etc. IF voltage i above 4 to 7 volts ,chaces are you are draining battery. In this case us an ammeter in place of volt meter, if it reads o.5 amps or more, you have a battery drain.