Battery light, then airbag, then ACR lights car stalls. ??? | FerrariChat
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Battery light, then airbag, then ACR lights car stalls. ???

Discussion in '456/550/575' started by RDM, Jul 21, 2012.

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  1. RDM

    RDM Karting

    Nov 22, 2010
    70
    Atlanta GA
    Full Name:
    Doug Moffat
    #1 RDM, Jul 21, 2012
    Is this an alternator problem? Battery light, then airbag light, then ACR light, then engine stalls. Battery is new.
     
  2. dakharris

    dakharris Two Time F1 World Champ

    Jun 7, 2001
    29,441
    Sleepy Hollow
    Full Name:
    Cavaliere Senzatesta
    #2 dakharris, Jul 21, 2012
    Your battery is discharging, so your alternator is not working. Could just be a loose belt or a bad connection.
     
  3. 360modena2003

    360modena2003 Formula 3

    Jul 11, 2009
    2,438
    #3 360modena2003, Jul 21, 2012
    If you recently replaced the battery check the connectors at the battery terminals and also the "cut-off" switch as well.
     
  4. RDM

    RDM Karting

    Nov 22, 2010
    70
    Atlanta GA
    Full Name:
    Doug Moffat
    #4 RDM, Jul 22, 2012
    Does any know of 550 alternator replacement alternatives to stock, or Ricambi at $900? Thanks Doug
     
  5. Cribbj

    Cribbj Formula 3
    BANNED

    Jan 1, 2011
    2,316
    Cooke City MT, The Coolest Small Town in America
    Full Name:
    John
    #5 Cribbj, Jul 22, 2012
    Moorfan replaced his with a Denso model 101211-7780, intended for a John Deere marine application. IIRC, he said it was an identical fit, except for one mounting hole which required enlarging. It's in his excellent thread "1998 550 Maranello sorting". Search for alternator and it'll probably come up multiple times.

    The voltage regulator apparently is fairly critical to keep the Ferrari's Motronics happy, and needs to be a Transpo model IN220E.
     
  6. RDM

    RDM Karting

    Nov 22, 2010
    70
    Atlanta GA
    Full Name:
    Doug Moffat
    #6 RDM, Aug 3, 2012
    While I am completely convinced that the Moorfan alternator solution is a good one, I decided to have mine rebuilt really onthe advice of the vendor for the Denso, John deer marine alternator, believing that the rebuilt one at $100-$200 would likely be as good as new compared with a $400 tag on the new one, plus $35 for a new voltage regulator and a touch more labor to install. One issue that the alternator supplier pointed out is the process of opening up the new alternator to switch out the voltage regulator would,likely void the mfg. warranty vs. a one year warranty on the rebuilt unit. So my total cost at the Ferrari dealer was about $700. Best, Doug
     

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