How To Voltage Drop Test. In short voltage drop testing is using a digital multimeter DMM or a similar tool to test actual circuit voltage and compare it with desired or anticipated circuit voltage. Using a digital multimeter is the fastest way to accurately measure voltage drop.
To test for a Voltage Drop on the Ground side of a circuit figure 2 follow the steps below. Put the black probe in the socket labeled COM for common meaning its common to all. 1 Connect the negative test lead of a Digital VoltOhm meter DVOM to the negative battery terminal.
While voltage drop testing can be a valuable tool in locating a battery draw.
Record the amount of voltage drop present. While voltage drop testing can be a valuable tool in locating a battery draw. To do it YourMechanic creates a load in the tested circuit and use a DVM digital volt meter to measure the voltage drop while the connection is under load. To check for voltage drop simply check at the battery or source of power for a circuit by connecting you meter leads black to DC negative and red to DC positive and check the voltage.
