How To Do A Battery Draw Test. With the key out of the ignition switch and the vehicle just sitting there make sure the doors are closed the test light should not light up bright. Connect the ammeter between the battery terminal and the cable clamp.
You also dont NEED a ton of high dollar special equipment to do this. Some people remove the positive cable to do this test and thats fine but I recommend the negative cable when doing parasitic draw testing. Start by removing the negative side battery cable from your car battery this is the black one.
Before you start the parasitic draw test remember to charge the battery completely first in order to get an accurate reading.
If you get value out of the. Now that we have verified that the battery is experiencing a parasitic draw we can move to exploring the different reasons and parts that can be pulling on your cars battery. Remove the negative battery cable. If you get value out of the.
