355-speedometer quit | FerrariChat

355-speedometer quit

Discussion in 'Technical Q&A' started by charles dyer, Apr 7, 2005.

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  1. charles dyer

    charles dyer Rookie

    Mar 1, 2004
    18
    Speedometer stopped working. Any ideas on where to look and fix?

    Five valves
     
  2. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,614
    The Brickyard
    Full Name:
    The Bad Guy
    Have you checked the fuses yet? That would be a good place to start.
     
  3. twoferraristom

    Apr 2, 2004
    43
    My speedo worked intermittantly then finally quit. I replaced the speedo sender unit and now it works fine. Check the sender unit connection first. I had to alter the socket before using it.. Very similar to an O2 sensor socket. I used my hand held grinder to remove a lenghtwise section about 1/4 of an inch wide. Then cleaned it up with a file.This allows you to locate the wire and connector out of the socket. The socket is 1-1/4 deep socket. I got mine at Sears.
    The sender unit is located at the driver's side of the transmission
    between the two braided hoses. Check your connections and fuse ( if there is one) first. If you do order a sender unit, be sure and order a new copper washer too.
     
  4. richard_wallace

    richard_wallace Formula 3

    Feb 6, 2004
    1,957
    Cincinnati, Ohio
    Full Name:
    Richard Wallace
    Great advice thus far:

    You can also do an easy thing first: Take off the Speedo/cluster pod and make sure the cable is tight against the gauge. It is two screws to take off the pod and 2 minutes to look and see if vibration has caused the cable to become loose or disconnected.

    There have been a few cases of various gauges and lights coming loose - always worth a quick look.

    Rich
     
  5. coolblue

    coolblue Karting

    May 6, 2004
    217
    The lights in the dashboard. If the suspension warning light came on as well, it IS the sender on the gearbox.
     
  6. speeder37

    speeder37 Karting

    Nov 18, 2003
    96
    Chicago
    Full Name:
    Matt
    And how do you easily remove the Speedo/Cluster pod? I have a speedo light that has out for some time.
     
  7. buddy ferraro

    buddy ferraro Rookie

    Apr 10, 2005
    4
    long island new york
    Full Name:
    buddy ferraro
    this happened to me last year. the sender is located at the left rear wheel on the top with two wires coming out of it. it is a large nut. i purchased the part from ferrari $90.00 and had it installed when i did my next inspection. it was a 10 minute job as the rear wheels were off for state insp. hope this helps. before it failed it would come and go. i had the same problem with my 82 alfa years ago. same fix, new sender.

    buddy
     
  8. richard_wallace

    richard_wallace Formula 3

    Feb 6, 2004
    1,957
    Cincinnati, Ohio
    Full Name:
    Richard Wallace
    It is about a 4 minute job - very easy.

    If you look straight at the pod - just below and to the right and left of the steering wheel / where it goes into the dash - you will find where the pod meets the dash. Just run your finger along the pod and the dash where it joins - you will feel one screw on either side of the steering wheel.

    Remove both screws. When you pull the pod off - move it/tip toward the drivers side window - remember there are many wires attached - so move it slow. There is enough slack in all the wires for you to be able to get in there and replace any bulbs, etc.

    Hope that helps,
    Rich
     
  9. speeder37

    speeder37 Karting

    Nov 18, 2003
    96
    Chicago
    Full Name:
    Matt
    Thanks much for your reply.
    Speeder
     
  10. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,044
    USA
    My 355 speedo sender failed recently, I have a replacement ready to install, but was wondering why these Veglia things fail so often? I had to replace one in my previous 78 308GTS and it was replaced shortly before I purchased my previou 87 328GTS...I have NEVER replaced one in any previous car, be it a domestic, Japanese or German. What gives? Maybe Ferrari should switch vendors for the instruments?
     
  11. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,614
    The Brickyard
    Full Name:
    The Bad Guy
    Nuked because I doubt posted.
     
  12. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,614
    The Brickyard
    Full Name:
    The Bad Guy
    I would also like to say that, sometimes that connections on the back of the speedo can get loose, and cause the speedo not work properly. So before you replace the sending unit make sure that the connections are properly attached to the back of the speedo/tach.
     
  13. Myhorse

    Myhorse Formula Junior

    Oct 31, 2003
    387
    what is a speedo???
     
  14. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,044
    USA
    New sender from Ricambi America...installed today, all good again! ;)

    *Note: It can be replaced with a 32mm closed end wrench if, you loosen and move one braided ss line from the transaxle out of the way...You will have to loosen the banjo bolt. The closed end wrench should be the stepped type, where the handle is about a centimeter or two above the closed end.
     
  15. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,614
    The Brickyard
    Full Name:
    The Bad Guy
    It's a brand of bathing suits that swimmers wear. :D
     
  16. Myhorse

    Myhorse Formula Junior

    Oct 31, 2003
    387
    or that some "swimmers" should not wear
     

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