How to test parasitic draw via Fuse Voltage drop?

This test will show you 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. Text instructions below video:

What’s the parasitic draw on a car battery?

Our subject vehicle has a parasitic draw of 60 milliamps. This is enough to discharge the battery. With our confirmed fault, we head to the interior fuse panel to pinpoint the source of the draw. Set your DVOM to read millivolts. Place the positive and negative test probe on each side of a single fuse.

When do you need a parasitic draw test?

A parasitic draw test is required when a vehicle battery becomes discharged with the key in the off position.

Is there a parasitic draw on a battery?

Using a low amp clamp and a digital volt ohm meter (DVOM), confirm there is a parasitic draw. Note the amount of draw you find. Our subject vehicle has a parasitic draw of 60 milliamps. This is enough to discharge the battery. With our confirmed fault, we head to the interior fuse panel to pinpoint the source of the draw.

How much parasitic draw does a car have?

Using a low amp clamp and a digital volt ohm meter (DVOM), confirm there is a parasitic draw. Note the amount of draw you find. Our subject vehicle has a parasitic draw of 60 milliamps.

A parasitic draw test is required when a vehicle battery becomes discharged with the key in the off position.

How to test parasitic draw via Fuse Voltage drop?