• Welcome to SVTPerformance!

Battery dies after a day of not driving

Discussion in 'New Edge Cobras' started by redzaku, Apr 8, 2021.

  1. redzaku

    redzaku Member Established Member

    Messages:
    48
    Joined:
    Jun 16, 2018
    Location:
    Richmond
    Car kept dying after a few days of not driving then I switch the batteries and still had the problem. Winter came put the car away let the battery stay charged while sitting for winter. Now when I drive the car the next morning it’s dead. When the cars off I have a .55ish amps and when I take the fuse for the radio out it goes to about .30ish I’m guessing because the radio gotta you know remember the time and stuff. If anyone has suggestions would be greatly appreciate.
     
  2. VA-Mach1

    VA-Mach1 Active Member Established Member

    Messages:
    440
    Joined:
    Mar 19, 2014
    Location:
    VA
    I had a similar problem. After many hours and hours of reading and testing it turned out to be the driver door ajar switch going bad. Replaced it and problem solved.

    Edit: my overhead light would stay on sometimes also. I just didn't notice it in the daylight
     
    shurur likes this.
  3. redzaku

    redzaku Member Established Member

    Messages:
    48
    Joined:
    Jun 16, 2018
    Location:
    Richmond
    that might be it seems like my doom light is only off or on though nothing when the door is open
     
  4. V6&V8SHO

    V6&V8SHO Well-Known Member Established Member

    Messages:
    1,306
    Joined:
    Feb 15, 2005
    Location:
    IL
    Mine was a burned up Mach amp.
     
  5. Real Time Recon

    Real Time Recon Member Established Member

    Messages:
    27
    Joined:
    Mar 30, 2021
    Location:
    Virginia
    Sounds like a direct ground problem, somewhere in the wringing
     
  6. DSG2003Mach1

    DSG2003Mach1 Premium Member Premium Member Established Member Single Barrel Sirs

    Messages:
    10,987
    Joined:
    Apr 15, 2004
    Location:
    Central Fl
    There are some other threads on here about chasing a current draw.

    stolen from another thread:

    "A 1.5 -2 amp draw will kill a battery over night
    Before the computer goes to sleep you should see a 2.1 amp approx but should drop to about .3 amps ounce asleep"

    you need to let the modules go to sleep (ie key out of the ignition and either leave door or open or closed and DONT open/close it while testing)

    with the volt meter then start pulling fuses are you going until you see voltage drop. Then you can isolate based on what's running off that fuse. You might have to start with engine bay fuse box then move to the interior.

    based on the information above it sounds like something on that radio circuit is the excessive draw.
     
  7. redzaku

    redzaku Member Established Member

    Messages:
    48
    Joined:
    Jun 16, 2018
    Location:
    Richmond
    Yeah ima have to chase some wires down on this radio any tips? For some reason my car has two radios a aftermarket one and a factory one right under it the aftermarket one works fine but the factory one doesn't might have to do with that.
     
  8. DSG2003Mach1

    DSG2003Mach1 Premium Member Premium Member Established Member Single Barrel Sirs

    Messages:
    10,987
    Joined:
    Apr 15, 2004
    Location:
    Central Fl
    I would say to leave the door open so it goes to sleep that way, already have the radios pulled out of the dash (super easy) and check power going to each one. Im not familiar with your stereo setup off hand, photos might help. I would also investigate the wiring after pulling them out and make sure something else isn't tapped into the wiring. Usually the radio fuse (under the dash anyway) is a key on power fuse (should be off with key off)
     
  9. shurur

    shurur Well-Known Member Established Member

    Messages:
    3,156
    Joined:
    Jan 2, 2011
    Location:
    Tampa FL
    Same problem with my ranger.
    WD40 to the latches fixed it.
     
  10. JaCobro

    JaCobro Premium Member Premium Member Established Member

    Messages:
    257
    Joined:
    Apr 25, 2020
    Location:
    North Carolina
    Sounds like you need to start with the radios. Pull them out. Leave them disconnected. Check connectors for anything obvious. If ok. Leave radios out. Then see if that fixes it.
     
  11. 52merc

    52merc Active Member Established Member

    Messages:
    466
    Joined:
    Nov 15, 2000
    Location:
    Calgary, Alberta, Canada
    I had an issue with a Mach460 amp that would continuously pull a small amount of power after it was "shut off". There was a burnt transistor in the 5V sense circuit that turns the amp on and off.

    This was my problem and tried to fix it but it didn't work per this video.

     
    Last edited: Apr 9, 2021
    DSG2003Mach1 likes this.
  12. shurur

    shurur Well-Known Member Established Member

    Messages:
    3,156
    Joined:
    Jan 2, 2011
    Location:
    Tampa FL
    Only other thing I would add is to leave your a ammeter between battery ground and the terminal..and let it set for 5-10 minutes...i.e. wait for stuff to shut down.

    Another thing is to turn the key on, then off..as some problems hide otherwise.
    You need to make like you just finished driving her in to the driveway.

    I found this video very helpful.
     
  13. GNBRETT

    GNBRETT Premium Member Premium Member Established Member Beer Money Bros.

    Messages:
    3,541
    Joined:
    Oct 14, 2010
    Location:
    Middle Earth
    Why dont u jump it. Get the battery charged then pull the Radio fuse and see what happens overnight.
     
  14. redzaku

    redzaku Member Established Member

    Messages:
    48
    Joined:
    Jun 16, 2018
    Location:
    Richmond
    On my day off I’ll start I’ve been working since I posted the thread I’ll keep you guys updated.
     
    shurur likes this.
  15. shurur

    shurur Well-Known Member Established Member

    Messages:
    3,156
    Joined:
    Jan 2, 2011
    Location:
    Tampa FL
    I know how that goes too.
    Yup..keep us posted.
     
  16. redzaku

    redzaku Member Established Member

    Messages:
    48
    Joined:
    Jun 16, 2018
    Location:
    Richmond
    A little update only had a day off so didn’t pull the radio but had the battery charging and took the radio fuse out still had current so I pulled a few fuses out of fuse box in the engine compartment while I was In There and one of the ignition fuses one the other drawing current. Took both out no current now.
     

Share This Page