VIDEO: How to test parasitic draw using voltage drop across fuses

A parasitic draw test is required when a vehicle battery becomes discharged with the key in the off position. A component or components are drawing current from the battery when they should not be. This test will show how to quickly pinpoint the source of the draw using voltage drop across fuses.

This method is fast and efficient in comparison to monitoring current and removing fuses. Using this method prevents the vehicle from waking up during the test, causing you to have to start over from sleep mode.