348 Wiring Diagrams | FerrariChat

348 Wiring Diagrams

Discussion in 'Technical Q&A' started by Paul_308, Apr 22, 2009.

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  1. Paul_308

    Paul_308 Formula 3

    Mar 12, 2004
    2,345
    I was asked if I had 348 wiring diagrams and unfortunately I've only done the 308 series so far.
    I did find a 348 Operators Manual, had to 'unlock' the manual as it, as most are password
    protected against copying. I then extracted the diagram pieces which are, in case of the 348,
    on 4 different pages for each individual diagram.

    Placed the 4 pieces carefully into Photoshop and created one large jpeg. Nine drawings resulted
    and are here, free for the download. I have no plans on 'colorizing' the 348 as they are in quite
    good shape...whereas the earlier diagrams such as 308's are virtually unuseable from the manuals.

    http://www.ferrari308gtbi.com/348/348ABSWiringDiagram.JPG
    http://www.ferrari308gtbi.com/348/348IgnitionWiringDiagram.jpg
    http://www.ferrari308gtbi.com/348/348WiringDiagramNumbers.jpg
    http://www.ferrari308gtbi.com/348/348LightsWiringDiagram.jpg
    http://www.ferrari308gtbi.com/348/348IgnitionWithoutCatalyticConverterDiagram.jpg
    http://www.ferrari308gtbi.com/348/348WindowsDoorsDomeRadioDiagrams.jpg
    http://www.ferrari308gtbi.com/348/348AC&EngineCoolingWiringDiagram.jpg
    http://www.ferrari308gtbi.com/348/348WiperWasherHornsWiringDiagram.jpg
    http://www.ferrari308gtbi.com/348/348StarterAlternatorWiringDiagram.jpg

    Incidently, I am almost finished with the 1973 365 GT4 2+2 and have started on the 1980 BB
    and 1981 BBi diagrams.
     
  2. GCalo

    GCalo F1 Veteran

    Sep 15, 2004
    7,645
    Northern California
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    Greg Calo
    You are a wizard for sure, Mr. Paul!
     
  3. gidge348

    gidge348 Formula Junior

    Dec 12, 2008
    343
    Perth West Australia
    Full Name:
    Ian Wood
    Hi Paul, don't know if you have read http://www.ferrarichat.com/forum/showthread.php?t=240072 but I am having dificulty making sence of my 348GTB wiring, doen not match the 348 diagrams :(

    Dave Helms has recomended crossing with 355 2.7, 512 & mondial T would you have those diagrams?
     
  4. Paul_308

    Paul_308 Formula 3

    Mar 12, 2004
    2,345
    #4 Paul_308, Apr 23, 2009
    Last edited by a moderator: Sep 7, 2017
    Ian, the thread you referenced shows one scary situation...wish I could help but I have no independent knowledge.
    I do have the 348 Workshop Manual pdf (280Mb) 465 pages which I have unlocked and could upload for you should you not have it.

    I am posting below a better view of the connector from the Motronic page.
    Image Unavailable, Please Login
     
  5. FandLcars

    FandLcars F1 Rookie

    Aug 6, 2006
    3,057
    Tempe, Az
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    Rick Schumm
    FANTASTIC!!! A BIG help. Thanks for doing this!!! :D
     
  6. Night life

    Night life F1 Veteran
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    Dec 1, 2007
    7,274
    The city that rhymes with fun in Canada
    Full Name:
    Roberto
    Excellent Paul thanks for going through the trouble..:)
     
  7. Monty22

    Monty22 Rookie

    Aug 16, 2024
    9
    Hi Everyone! does anyone have the wiring Diagrams for a 348 that they can share?
     
  8. Qavion

    Qavion F1 World Champ
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    Feb 20, 2015
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    Ian Riddell

    Sounds serious. What’s broken?
     
  9. Monty22

    Monty22 Rookie

    Aug 16, 2024
    9
    PO had an alarm poorly installed along with Stereo. I am restoring to factory but need wiring schematics
     
  10. Qavion

    Qavion F1 World Champ
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    Feb 20, 2015
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    Ian Riddell
    Do you have a 2.5 or 2.7 Motronic ECU? Spider? USA/Canada or ROW? Left/Right hand drive? What year? Where is your battery located? Where are you located? Are you removing an alarm or an immobiliser system?

    The factory wiring diagrams generally don't show you what the typical stereo installation is like.

    Sometimes you need more than wiring diagrams to resolve these issues, such as photos of original wiring.

    Introduce yourself on the 348/355 forum. You'll get more car-specific knowledge there.
     
  11. Monty22

    Monty22 Rookie

    Aug 16, 2024
    9
    Lhd, battery is front drivers side. 94 spider. Car NA and located in the northeast.
    Thanks for the suggestion.

    I am an electrical engineer with 35 years hands on restoring cars among other things. Just need the schematics without spending $2500.
     
  12. Qavion

    Qavion F1 World Champ
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    #12 Qavion, Aug 21, 2024
    Last edited: Aug 21, 2024

    Attached Files:

  13. Qavion

    Qavion F1 World Champ
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    That plug is known as "115" and will be seen in numerous important diagrams.

    Motronic 2.7 diagram here (for a short time only):

    https://www.dropbox.com/t/YWSqhP9zJuaAuN7B

    Instrument diagram here, but it's for a Euro car. Not sure what the differences are.

    https://www.dropbox.com/t/EfUhzQASIJOtISCH

    It has a late model plug "115".

    Unfortunately, I don't have a doors and windows diagram for the Spider. It uses a F355 type Window ECU and a special jumper plug on the relay panel (instead of a relay). The diagram, however, does include the OEM radio plug:

    https://www.dropbox.com/t/yGEgj6VncMIZgGpK


    Late model battery/alternator diagram with 12 pin "115" plug, but I haven't completely mapped the wiring going through it:

    https://www.dropbox.com/t/v7K2qgyqJ0jl3I40

    I have a few others, but you shouldn't need them. Contact me on the 348/355 forum if you need more info.
     
  14. Ferrari Tech

    Ferrari Tech Formula 3

    Mar 5, 2010
    1,214
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    Wade Williams
    Thanks Ian. A few more bits of information in the folder. Always nice to add information.
     
    Qavion likes this.
  15. Monty22

    Monty22 Rookie

    Aug 16, 2024
    9
    Awesome!! This is very helpful!
     
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  16. Qavion

    Qavion F1 World Champ
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    You're welcome, Wade, but always ask for the latest version if you have an issue. I'm always updating/improving/correcting them. I have wiring diagrams for other systems (brakes, earlier instruments, lights (Euro/USA), mouse seat belts* (USA/two types), ABS, HVAC, Motronic 2.5 engine, mirrors/window heat, etc.

    *work in progress
     
    Ferrari Tech likes this.
  17. Ferrari Tech

    Ferrari Tech Formula 3

    Mar 5, 2010
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    Wade Williams
    Thank you, I will reach out when I need wiring diagrams. Having the colored conversions are so easy to use. Saves so much time. I am not talented enough or have the skills and knowledge to convert diagrams.
     
  18. Monty22

    Monty22 Rookie

    Aug 16, 2024
    9
    hi Ian, would you mind posting those links again, I didn’t download in time:(
     
  19. Qavion

    Qavion F1 World Champ
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  20. Monty22

    Monty22 Rookie

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  21. Manuel.G

    Manuel.G Karting

    Mar 21, 2013
    219
    España - Madrid
  22. Qavion

    Qavion F1 World Champ
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    I'm not sure which diagrams you would need. It depends on how the aftermarket alarm is wired into the car. Is it an alarm only or does it immobilise the engine (or starter motor). Does it unlock/lock the doors? Is it wired into the car's horn and turn lights?

    Would you have a wiring diagram for this model alarm ... or at least a model number?
     
  23. Manuel.G

    Manuel.G Karting

    Mar 21, 2013
    219
    España - Madrid

    I don't know the details. We're going to do a first start-up after 20 years! And we want to have the diagrams in case we have any problems, so we can have them handy immediately... obviously, after so many years, we don't have the remote to deactivate/activate the alarm.

    Tomorrow, I could send a photo of the alarm system installed in the car...
     
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  24. Qavion

    Qavion F1 World Champ
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    Feb 20, 2015
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    If it has a model number, that would be helpful.

    If the engine doesn't crank, I would check for volts at the starter solenoid wire. If no voltage, I would work backwards to the ignition key. e.g. there is a circular plug in the engine bay on the left hand side which carries the voltage to the starter. If no voltage there, access the back of the relay panel and check the voltage coming from the key on connector A pin 4 and connector D pin 4.

    https://www.dropbox.com/t/EUXU1bXnpYiaM0dT

    Link expires in 6 days.

    There were some changes made towards the end of production. The circular plug became a more robust rectangular plug.

    https://www.dropbox.com/t/m7ZYoRYBfnJKgqzf

    See post #12
    https://www.ferrarichat.com/forum/posts/149781853/

    If there is cranking but no start, it will be a little harder to diagnose. Check that the fuel pumps are operating. The alarm may be inhibiting the pumps. Or the pumps have frozen after so long. Jumper the pump relays (pins 30 and 87).

    https://www.dropbox.com/t/tlJouKie7pvFzB3h

    Please let us know how you go.
     
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  25. Manuel.G

    Manuel.G Karting

    Mar 21, 2013
    219
    España - Madrid
    This is what I have installed

    Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
     
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