Signal light issues 1995 F355 Spider | FerrariChat
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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

    Thomas N Iannella Rookie

    Jul 23, 2018
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    Thomas N Iannella
    #1 Thomas N Iannella, May 14, 2023
    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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    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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    #3 Qavion, May 14, 2023
    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
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    May 29, 2001
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    #4 f355spider, May 14, 2023
    +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
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    #5 raemin, May 15, 2023
    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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