How do you test for a parasitic drain on your car battery?
What’s the best way to test for a parasitic drain on my car battery? My battery gave out a few days ago, but it’s only a few months old. My friend gave me a jumpstart and I drove around for a bit to help it recharge—but I need to make sure it’s not being constantly drained.
- Step 1: Turn off your car before you start messing with the battery. Make sure to set your multimeter to DC.
- Step 2: Remove the negative battery cable from your car and put it in contact with one of your multimeter leads.
- Step 3: Connect the other lead on your multimeter to the negative battery terminal. Use zip ties to keep them in place.
- Step 4: Check your multimeter to make sure your car is using about 50 milliamps, which is standard for a normal car.
- Step 5: Open your hood fuse panel and pull one fuse at a time while keeping your eyes on the multimeter. Make sure you put the fuses back where you found them. If you see any significant dips in amps when you pull a fuse, then you’ve found your problem!
- Step 6: Replace the faulty fuse to stop the parasitic drain!