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612 parasitic current draw measurement?

Discussion in '612/599' started by Always Irreverent Megan, Oct 5, 2019.

  1. Always Irreverent Megan

    Sep 24, 2019
    2
    Gig Harbor, WA
    Full Name:
    Megan Amherst
    #1 Always Irreverent Megan, Oct 5, 2019
    Last edited: Oct 5, 2019
    Hello All, My first post here. I recently purchased an '05 612. It has a fairly new 94R battery in it. It's dated 2/19. Battery's dead after two days of sitting. Is this normal? I measured the battery voltage, key off, at 12.49V. Engine running, 14.48V. After fully charging the battery with my CTEK 7002, I started to perform a parasitic amp draw test today by putting my multimeter between the neg battery terminal and the car's neg battery cable. As the car's powering down/going to sleep, the amperage draw drops from 3.21 amps to 2.09 amps, and after about 5 minutes to 0.10 amps (100 milliamps). Seems high to me. Does anyone know what the acceptable power draw is for this car? Is it common for the battery to be flat enough that the car won't start--after only two days? I'm using the battery disconnect in the trunk daily, which is a bit of a PITA.

    Also, does anyone have a link, jpg, etc. of the wiring schematic for this car? I'm trying to resolve an issue with the trunk latch not showing as latched on the digital dash display. Thank you for any and all responses, Megan
     
  2. tazandjan

    tazandjan Three Time F1 World Champ
    Owner Lifetime Rossa

    Jul 19, 2008
    30,304
    Albuquerque, NM
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    Terry H Phillips
    Ferrari usually quotes 40 ma as the highest draw you should see.

    Sounds like you need a new battery. No telling how it was treated before you got her.
     
  3. Always Irreverent Megan

    Sep 24, 2019
    2
    Gig Harbor, WA
    Full Name:
    Megan Amherst
    Thank you for your reply. I was wondering that. I put a brand new Optima red top that I bought for a project BMW of mine. The car drained that battery in two days as well. Kinda surprised me.
     
  4. TrojanFan

    TrojanFan F1 Rookie
    Silver Subscribed Owner

    Nov 17, 2008
    3,831
    So. CA & NV
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    Peter
    I've had a red top in my car for 2.5 years with no issues. My 612 can easily sit for a week and start right up. I wouldn't push it to 2 weeks though. I usually have it on my CTEK if its not going to be driven for more that 3-4 days or longer. Also have a 355 which shouldn't have as much electronics on it. I can go a week to 10 days on thats car so it sits on a CTEK too.
     
  5. tazandjan

    tazandjan Three Time F1 World Champ
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    Jul 19, 2008
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    Albuquerque, NM
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    Megan- Sure sounds like she has a short somewhere or the battery ground strap is not making good contact.
     
  6. ttforcefed

    ttforcefed F1 World Champ
    Rossa Subscribed

    Aug 22, 2002
    10,912
    612 and FF can eat batteries. use an interstate. i can leave my 612 and FF off a tender for 3 weeks now.
     
  7. tazandjan

    tazandjan Three Time F1 World Champ
    Owner Lifetime Rossa

    Jul 19, 2008
    30,304
    Albuquerque, NM
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    Terry H Phillips
    Yup, have never been fond of Optimas since they moved production to Mexico.
     
  8. Nospinzone

    Nospinzone F1 Rookie

    Jul 1, 2013
    4,174
    MA
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    I've had the best experience with Interstate in all my cars. The only exception is the Panasonic that was supplied with my Lexus LS460. I had it for 9 years and I only changed it because I thought why press my luck with a northeast winter arriving. I should have kept it to see how long it would go.

    Megan, I would think something is definitely drawing current.
     
  9. Cribbj

    Cribbj Formula 3
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    Jan 1, 2011
    1,960
    Houston
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    John
    Keep your ammeter connected and start pulling fuses to see which is the circuit that is drawing the current.

    If none of them are culprits, start suspecting leaky diodes in the alternator.
     
  10. donv

    donv F1 World Champ
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    Jan 5, 2002
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    Don
    Two days is crazy. Mine is good for a week or two (at least), but I generally keep it on the charger when in the garage. But I take it on trips and leave it for a few days, no problem.
     
  11. brogenville

    brogenville Karting

    Apr 24, 2012
    151
    UK
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    Robin
    +1 on the pulling fuses. Definitely seems like something is amiss if you're only getting 2 days out of the battery. It could just be the immobiliser though getting old and crappy. If that's the case, you may want to consider getting an immobiliser delete.
     
  12. tazandjan

    tazandjan Three Time F1 World Champ
    Owner Lifetime Rossa

    Jul 19, 2008
    30,304
    Albuquerque, NM
    Full Name:
    Terry H Phillips
    The 612 alarm system is much more modern than the one fitted to 360s and earlier Ferraris. Has not caused much in the way of problems compared to the old systems.
     
  13. TrojanFan

    TrojanFan F1 Rookie
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    Nov 17, 2008
    3,831
    So. CA & NV
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    Peter
    The Optima wasn't my first choice but I needed a battery that day (car was delivered to me with a dead battery) and the proper Interstate size was a special order. When for the Optima which was available at 1/2 the price and its been no issues, but I do try to keep it on a tender.
     

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