In a previous video we had a look at a Jeep that had a customer complaint that the battery dies overnight. I mentioned in that video that I had a Honda Accord to look at that had the same issue. Well, here it is. -Enjoy!
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49 thoughts on “Battery dies everyday: testing for parasitic draw”
  1. Avataaar/Circle Created with python_avatars Rip Vanwrinkle says:

    I had a nasty battery draw in my 06 Grand Prix. Took it into the shop and they came up with just about every module in the car as being bad. Told them thank you but no thank you. After watching one of your videos I decided to use the power of deduction and try to solve this problem myself. Took about 2 hours to track the circuit and when I found it, I pulled the fuse and the dash cam shut down so I reached in and unplugged the dash cam which was always plugged into a power outlet inside the console and the power outlet was always live even with the ignition switch off which I didn't know. There went my nasty draw. I took it back to the shop and they checked it again. They stood scratching their heads wondering what I did. I don't think they believed me that the dash cam always being live was the problem and that it could kill the battery. To me it just proved their incompetence. Just hope they don't attempt to screw someone else like they tried to do to me. I wound up rewiring the outlets so they shut off with the ignition switch. Problem solved. I sure miss my nasty lil voltage draw…..NOT. LOL
    I should also mention that I replaced the battery ($380) when this first started (which now I believe was a waste of money) so I was pretty sure it wasn't the new battery. The car also sits a lot so it would take a week or so to kill the battery. I left it sitting for about 2 weeks and the car started right up.
    To bad there weren't a few mechanics around here (S/W Ontario Canada) with your knowledge and ability to track wiring problems. Yer pretty dad gum good at what you do. Keep up the good work and keep the videos coming.

    Take care and have an awesome week.

  2. Avataaar/Circle Created with python_avatars Adrian Ferreira says:

    Do you happen to have this type of diagnosis on an older vehicle (1966), where there is no Fuse Box? My guess is that it's the same process and just pinpoint where the juice is being pulled??? Need to give it a try with recommended tools. If not, I may just have to fly you out here to California… hahaha

  3. Avataaar/Circle Created with python_avatars Kenny Kanonik says:

    Thanks this is great lesson good lack to you

  4. Avataaar/Circle Created with python_avatars NightForce 1 says:

    I understand the reason for inserting a meter in series is to confirm the suspicion of current draw and the amount.

    What I learned today is using a second meter set to milliamps will indicate whether or not there's current flowing across the fuse and if there is you've identified the likely circuit of the draw.

    Can I assume, if the car is asleep as you've shown and everything's powered down, without having a meter in series, I can simply use a multi-meter checking across every fuse to determine the suspect circuit? The reason I ask is I only have one meter.

    Thanks in advance Eric!

  5. Avataaar/Circle Created with python_avatars jesse ramirez says:

    On power draw. First, before you go to an expense ($$$$)on meters,books and local auto shops ;that are charging at least 75 .00 $ to drive you in his shop, and lie to you to the tune of 5 hundred $$ . Check all your off and on buttons(switches) your dashboard ,trunk ,door,hood. You might be surprised, good luck.😀😀😀😌

  6. Avataaar/Circle Created with python_avatars Dave Brosius says:

    Fun fact, Google captioning translated hoohoo as doozo

  7. Avataaar/Circle Created with python_avatars Aebrhame Assets says:

    Hi my battery voltage keeping going to 12.5 and up than back to 12.5 what is the cuz mechanic is telling me alternator need to be change can you plz tell me if you have ideas I only see engin light on my dashboard no battery light

  8. Avataaar/Circle Created with python_avatars Brandin Douangvilay says:

    Thank you for being such a great teacher! Our shop doesn’t currently have a diagnostician so as an apprentice i’ve been left alone to learn by myself but you have been such a great help/teacher. Wish I lived close enough to work with you and have you as a mentor 😭

  9. Avataaar/Circle Created with python_avatars jamie stanley says:

    With the keyfob so close on the roof it may be keeping the car awake .

  10. Avataaar/Circle Created with python_avatars Griffin Reitz says:

    I sure wished my brain worked. Way back last century, when I worked on cars, I know we hooked up in series off the ground, but I'd have sworn we were looking at voltage, not amperage. Then just started pulling fuses. ( they were round and glass back then ) No computers in those days. Living in central KS nine times out of ten the problem was "farmer installed" trailer lights. LOL

    Am I wrong ?? Probably LOL

  11. Avataaar/Circle Created with python_avatars Mike Hansen says:

    WHat site do you pull your car schematics from and how much is it. Thanks.

  12. Avataaar/Circle Created with python_avatars T Smith says:

    Could make yourself a fused jumper. Maybe with one click lighter fuse in it.

  13. Avataaar/Circle Created with python_avatars KJV Dust says:

    I've always wondered…. is that Scotty Kilmer holding a chainsaw on your whiteboard?

  14. Avataaar/Circle Created with python_avatars michelediane miller says:

    Last time I had this issue…… Solinoid on the starter was pulling power

  15. Avataaar/Circle Created with python_avatars Eric Orta says:

    Very awesome learned a lot on the flow to diag thank you wealth of knowledge

  16. Avataaar/Circle Created with python_avatars BOODRO says:

    I love Honda, man….great cars. I recently got a modern CR-V. 2018. Payments suck, but dayamn! It's one helluva car…

  17. Avataaar/Circle Created with python_avatars Craig Miller says:

    Man, spotting that horn honk being absent and going to the lock switch was a thing of beauty. Powerful deductive skills there. Great class. I've watched this video a few times now and I have taken down the target diagram in my notes. I just hope I can pull it off when the time comes. Thanks Eric!

  18. Avataaar/Circle Created with python_avatars van vann says:

    I just love watching your videos!!

  19. Avataaar/Circle Created with python_avatars Daniel Dailey says:

    Hello dan here have a 2013 thats had a draw for months all fuses checked nothing there with the voltage light, unplugged ever fuse and the draw is still there. so stumped on this one. any suggestions??

  20. Avataaar/Circle Created with python_avatars jonny4523 says:

    Keep these coming!!! I always learn something from your videos.

  21. Avataaar/Circle Created with python_avatars John White says:

    Mrs O is Beautiful and would like to know why you call her that? Only if you want to share Man?
    I just love your videos and please keep them coming.

  22. Avataaar/Circle Created with python_avatars Mike Robbins says:

    Good job Eric O.

  23. Avataaar/Circle Created with python_avatars Patrick Barber says:

    Mrs O always looks beautiful

  24. Avataaar/Circle Created with python_avatars jr neff says:

    watched the show from day one . still cant buy a sma sticker scotty has them on his junk tool boxes thank you for you vids still cant fing mrs o you tube cooking show must be on the down low

  25. Avataaar/Circle Created with python_avatars Cullen Pulis says:

    Genuine question for you, in this instance would simply charge your diagnosis fee before you give them the keys or how would that play out? Not gonna hate one way or the other just curious if I should change my own practices

  26. Avataaar/Circle Created with python_avatars Bear Nay says:

    That’s why I like driving older cars and trucks they don’t have all this stuff on it.But I do like watching you go through all The different ways to find problems. Thank you sir.

  27. Avataaar/Circle Created with python_avatars tony cotta says:

    Eric what i do is hook up a amp clamp to the ground side with out removing cable it set to 600 mili amp scale then go threw pulling the fuse after fuse it is a problem they can be intermittent a lot of the times then i verify by pulling fuse set my DVOM to amp scale and see current then go from their.

  28. Avataaar/Circle Created with python_avatars Donald Davis says:

    I always called it "chasing wild geese". or a wild goose chase. that trips up a LOT of people….also… the "unknown black box" people get off track that their problem just has to be that and they miss something very simple, end up getting a new black box and that don't fix nuthin…. and this way of thinking works will most anything electrical when being trouble shot. I actually taught this in an apprentice class I taught. I was an elevator repairman (40 years of it) … now retired fleet bus mechanic…. old gray haired love watching the videos!! Thanks… never too old to learn!!

  29. Avataaar/Circle Created with python_avatars Ruben Proost says:


  30. Avataaar/Circle Created with python_avatars Ruben Proost says:

    I had a light stay on in the glove box.

  31. Avataaar/Circle Created with python_avatars MrCougar214 says:

    Where do you find these wiring schematics? I need them for my 07 dodge charger 3.7L. I have a draw and I am only able to trace it to fuse #14(rear fuse box). From there I am stuck because all I can find online is the fuse box layout and what the fuse goes to. I can't find anything on the wiring itself and what is connected to what circuit.

  32. Avataaar/Circle Created with python_avatars bill hickey says:

    I work avionics on heavy aircraft. I love watching people take a methodical reasonable approach to troubleshooting. Its frikin painful and torture to watch someone work on something and guess or flip quarters to figure out what part to replace.

  33. Avataaar/Circle Created with python_avatars Scott Tucker says:

    About to ask about replacing window switch,,I see you replace it,,,but if you didn't how do you charge for the diagnosis by the hour or by the job ,I'm unsure of how to handle that myself,don't want to rip off myself or my customer

  34. Avataaar/Circle Created with python_avatars Ken Spock says:

    Always a pleasure watching your vids, please keep them coming. Thx for sharing

  35. Avataaar/Circle Created with python_avatars Life Sucks says:

    I have a parasitic draw on my bank account. I call it the ex-wife…

  36. Avataaar/Circle Created with python_avatars David Falconer says:

    That white board is a good idea love your video's. Interesting.

  37. Avataaar/Circle Created with python_avatars Delroy Aguiar says:

    Hi. So I disconnected the negative battery post and the negative cable. Now, when i touch one electrode of my multimeter to the negative battery post and one electrode of my multimeter to the negative cable the reading it shows me is O.04 A. Is this ok? Or is it a parastic draw? Because whenever i check my battery voltage in the mornings it shows me 11.94 V.

  38. Avataaar/Circle Created with python_avatars Richard Vasquez says:

    U sir are the man! Thank you so much for your videos are very informative and very educational for us techs that are starting I really appreciate your content keep up the good work and thanks again

  39. Avataaar/Circle Created with python_avatars Django Santiago says:

    The Scotty Kilmer sticker lol

  40. Avataaar/Circle Created with python_avatars Joe Jimenez says:

    Interesting video thanks