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Power draining.

googlybear7550googlybear7550 Posts: 3
edited December 2016 in Hyundai
I have a 2009 Hyundai Elantra. I recently started having a problem with my battery dying. I've changed it and it will start right up. After I drive it for awhile the battery is dead. I've pulled the positive off to test the alternator while running. Checked it with a volt meter. Said it was charging. Hooked the meter up to the negative post and negative cable and I'm getting almost a 4 amp draw from somewhere. I went thru and pulled every fuse while the meter was hooked up to find the draw and the meter never dropped. What else could be pulling my power??

Comments

  • Mr_ShiftrightMr_Shiftright Sonoma, CaliforniaPosts: 64,490
    edited December 2016
    "I've pulled the positive off to test the alternator while running."

    First off, don't ever do that! Potentially harmful to the alternator and perhaps other electronic components on a modern car.

    Now, to your question. It seems likely that you missed a fuse. Most modern cars have more than one fuse box, so you might want to consult your owner's manual. Usually there's a box in the engine bay and one in the passenger compartment, often on the left kickpad or under the dash around the steering post.

    Here's a good VIDEO on CHECKING PARASITIC DRAW

    Here's a simple TUTORIAL on how to test an alternator with a DVOM (if that's all you have available).
  • My phone isn't pulling up the video you posted. And there are 2 fuse box locations. By the battery and and the other by the driver side door on the side of the dash. I went through twice pulling the fuses just to be sure and I still never saw a drop. 
  • Mr_ShiftrightMr_Shiftright Sonoma, CaliforniaPosts: 64,490
    Well if you're sure then you might disconnect your alternator and see what happens to the DVOM reading.
  • I pulled the fuse for the alternator when checking and it didn't drop. 
  • Mr_ShiftrightMr_Shiftright Sonoma, CaliforniaPosts: 64,490
    Well then if you've really checked all fuses, and presuming you don't have any relays in line before the fuse that protects the circuit, then your problem has to lie between the battery and the fuse box.
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