328 ABS fuse missing ?

Discussion in 'Technical Q&A' started by F328GTS/GTB, Jun 19, 2009.

  1. F328GTS/GTB

    F328GTS/GTB Formula Junior

    May 3, 2005
    Full Name:
    #1 F328GTS/GTB, Jun 19, 2009
    Last edited by a moderator: Sep 7, 2017
    One fuse seems to be missing on the black relay.
    I have only partial wiring diagram (scheme is missing) so I cannot check.

    What do you think about ?

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  3. No Doubt

    No Doubt Six Time F1 World Champ

    May 21, 2005
    Full Name:
    Mr. Sideways
    Installing a 10 Amp fuse there should disable your ABS while driving, but allow trouble codes to be "flashed" onto your dash, presuming that you have a stock 1989 328 with the same ABS as the 1989 to 1995 348s.
  4. jonesdds

    jonesdds Formula 3

    Aug 31, 2006
    SB,CA & Park City UT
    Full Name:

    Mine is missing like that as well. I had no idea that you disable ABS that way. I'd be curious how the brakes feel without the ABS. I assume it would be easy to tell the difference. Mine have kind of an artificial feel to them, not the right word for what I feel but couldn't thick of anything more descriptive. Not a direct correlation between pressing the pedal and the amount of braking, a disconnected feeling. I assume it's the ABS as the 308's I've driven feel very different.

  5. fastradio

    fastradio F1 Rookie
    Professional Ferrari Technician BANNED

    Apr 26, 2006
    New England
    Full Name:
    David Feinberg
    With or without the fuse in, the brake pedal will feel the same on an ABS-equipped 328. Unlike the 308, the 328 with ABS does not use a vauum booster to reduce pedal efffort, but rather, in essence, a hydraulic-assist unit. In my opinion, a 328 with ABS has a very "hard" brake pedal, versus a much softer one as found in any 308, or non-ABS 328.

  6. Marco Bussadori

    Marco Bussadori Formula Junior

    Aug 6, 2007
    Full Name:
    Marco Bussadori
    Normal mode is no fuse installed. When the ABS unit is tested for maintenance, a 10A fuse is inserted and the ABS unit will go into test mode, flashing various codes as various pins are connected on a test board which is connected between the usual plug and the ABS unit.

    I have the full diagnostic sheets and test board for the 348, which uses the same Teves ABS unit.

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  8. F328GTS/GTB

    F328GTS/GTB Formula Junior

    May 3, 2005
    Full Name:
    Thanks for all your answers Ferraristi.
  9. Jon22

    Jon22 Karting

    Sep 4, 2004
    Full Name:
    The missing fuse is only inserted to run tests on the ABS as it is is normal.

    The car is fine.

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