Signal light issues 1995 F355 Spider | FerrariChat

Signal light issues 1995 F355 Spider

Discussion in 'Technical Q&A' started by Thomas N Iannella, May 14, 2023.

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  1. Thomas N Iannella

    Jul 23, 2018
    2
    Full Name:
    Thomas N Iannella
    My right signal light works sporadically. The left works fine. Anyone have any ideas or suggestion? Bulbs are good, fuses are good.

    Tom
     
  2. Qavion

    Qavion F1 World Champ
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    Feb 20, 2015
    14,275
    Sydney
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    Ian Riddell
    #2 Qavion, May 14, 2023
    Last edited: May 14, 2023
    Generally caused by cracks in the circuit board soldering inside the hazard/turn module.

    Gently remove the cover from the Hazard/Turn Module and inspect these specific solder joints.

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    You may need a magnifying glass to see cracks. Move the matching module pins to see if the cracks become visible. If nothing visible, resolder anyway.

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    Module location shown here on LHD cars (just above the carpet line).

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    The module on the left with more wires is the Hazard/Turn Module. The other module is the buzzer (found on earlier cars)

    EDIT: also check for 12 volts coming from the steering column stalk switch (with ignition on) on pin 3

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    (there should be a white wire on that socket)


     
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  3. Qavion

    Qavion F1 World Champ
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    Feb 20, 2015
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    Ian Riddell
    P.S> There is a single bolt holding the module socket in position. It may have a washer on it. Don't drop the washer behind the carpet ;)
     
  4. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,044
    USA
    +1 on the above. I had similar symptoms, in my case the hazards did not work. The module is rather expensive for what it is, and figured I had nothing to lose by opening it up. Once I removed the module and pried the cover off, it was immediately obvious what the problem was. One of the spade terminals which is soldered to the board had a cracked solder joint. If I moved the spade terminal gently, I could see it move the pin on the board. I touched it up with a soldering iron and it that fixed it right up.
     
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  5. raemin

    raemin Formula 3

    Jan 16, 2007
    2,339
    Lyon (FR)
    Full Name:
    R. Emin
    Ferrari flashing relays have always been plagued by so-so soldering. See https://www.ferrarichat.com/forum/threads/400i-starting-problem.612464/#post-146906259 . That's a pulse relay meant for a 400 injector, but basically the same issue: cold solder joint against the spade connector that does not age well .

    There is no way such a small drop of solder can withstand the stress induced by the connection/disconnection of the connector. Maybe that clean solder and a dab of epoxy could mitigate the issue?
     

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