how to check for a battery drain in a car
Instructions. Disconnect the negative battery cable from the battery. Insert the test light so that it is in the circuit between the negative battery cable and the negative terminal of the battery.This can be done by connecting one end of the test light to the negative terminal of the battery, and the other end of the test light to the end of the negative battery cable.nstructions. Disconnect the negative battery cable from the battery. Insert the test light so that it is in the circuit between the negative battery cable and the negative terminal of the battery.