355 battery charging procedure | FerrariChat

355 battery charging procedure

Discussion in 'Technical Q&A' started by ze_shark, Mar 28, 2004.

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  1. ze_shark

    ze_shark Formula 3

    Jul 13, 2003
    1,274
    Switzerland (NW)
    Question: is there any counter-indication to charge the battery using a battery charger connected to the + and ground poles located in the engine bay while the battery switch is on (does not work if it's off) ?

    The owner manual is enlightingly useful. To jumpstart the car, you should use the poles in the bay, but to charge the battery, you should connect directly to the battery. After removing the 5 screws holding the panel (manual induces you to believe that there are 2, I found out it is impossible to reach the two poles without removing the front wheel :-(
     
  2. Mitch Alsup

    Mitch Alsup F1 Veteran

    Nov 4, 2003
    9,649
    I charge my F355 battery (when needed) from the poles in the engine bay switch on.
     
  3. malibumk

    malibumk Karting

    May 14, 2002
    167
    Malibu, CA
    Full Name:
    Mike Klein
    Everyone charges from the bay....no problem.
     
  4. yfc

    yfc Karting

    Dec 23, 2003
    212
    Geneva / Switzerland
    Full Name:
    Christophe
    Keeping the batterie loaded via the cigare lighter seams to be the easiest solution. Especially it after removing 5 screw you still need to remove the wheel.

    Zhark, tell me it's a joke! I'm a bit concern by removing the batterie since it should already be 6 years old!!!!!!!

    So far, I have keept my batterie loaded by connecting the external "power" to the cabine lighter plug. That's easy and quite efficient ... so far.

    Bye for now,
    Christophe.
     
  5. ze_shark

    ze_shark Formula 3

    Jul 13, 2003
    1,274
    Switzerland (NW)
    Advice given earlier in this thread works, charging through the engine bay contacts which are hidden under a plate on the right side, with the battery switch on, worked fine (although the proc in the manual is way more complex).

    I did not know about the cigarette lighter trick, but I wonder how much current the fuse can stand.

    For battery removal, this is not a joke. No way to get to the battery withough removing the front wheel.
     
  6. yfc

    yfc Karting

    Dec 23, 2003
    212
    Geneva / Switzerland
    Full Name:
    Christophe
    You're right ze_shark. The cigarette lighter fuse will probably not afford the current of a full battery (re)load. But for keeping the batterie at full load during long storage, the cigarette lighter plug is fine.

    I unfortunately don't remember the brand of the charger I use. But you should easily find some product on the Web.

    Bye,
    Christophe.
     
  7. Pray_for_Powder

    Jan 17, 2025
    6
    Cottonwood Heights, UT
    Full Name:
    Mark Skidmore
    Somewhat new owner of a 1999 355 F1. Where are the poles in the engine bay and what is the switch?
     
  8. Pray_for_Powder

    Jan 17, 2025
    6
    Cottonwood Heights, UT
    Full Name:
    Mark Skidmore
    NM ... found them under the right/passenger side panel along the inside edge of the right rear fender.
     
    greyboxer and Qavion like this.
  9. fdekeu

    fdekeu Formula Junior
    Silver Subscribed

    Jun 19, 2008
    629
    Belzium
    Full Name:
    Frank
    I added an extra wire (+) to where the battery switch is
    So I can charge the battery while disconnected (switch = off)
    This way you cannot blow the alternator diodes
     
  10. Mike Morrissey

    Mike Morrissey Formula 3
    Silver Subscribed

    Nov 2, 2018
    1,129
    Denver, Colorado
    Full Name:
    Mike Morrissey
  11. Pray_for_Powder

    Jan 17, 2025
    6
    Cottonwood Heights, UT
    Full Name:
    Mark Skidmore
    Where's the battery switch you refer to?
     
  12. Pray_for_Powder

    Jan 17, 2025
    6
    Cottonwood Heights, UT
    Full Name:
    Mark Skidmore
    NM - I found it ... also found that a previous owner has run a tender wire into the switch compartment ...
     
  13. Qavion

    Qavion F1 World Champ
    Silver Subscribed

    Feb 20, 2015
    13,888
    Sydney
    Full Name:
    Ian Riddell
    I'm having trouble visualising how you added a positive wire to the disconnect switch. One side of the switch goes to ground, the other side goes to the negative terminal of the battery.
     
  14. Pray_for_Powder

    Jan 17, 2025
    6
    Cottonwood Heights, UT
    Full Name:
    Mark Skidmore
  15. fdekeu

    fdekeu Formula Junior
    Silver Subscribed

    Jun 19, 2008
    629
    Belzium
    Full Name:
    Frank
    Positive wire goes directly to the battery
    I connect the charger to this + and the negative on the switch coming from the battery -
    The above post is even a better solution if you have a charger with a connector, as e.g. CTEK
     
    Qavion likes this.
  16. Pray_for_Powder

    Jan 17, 2025
    6
    Cottonwood Heights, UT
    Full Name:
    Mark Skidmore
    I use the Schumacher battery maintainer for all my cars and they seem to work fine ...
     

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