355 Headlight Question

Discussion in '348/355' started by 2COOOL, May 2, 2009.

  1. 2COOOL

    2COOOL Karting

    Nov 23, 2003
    My 355 passenger headlight will not lift. The drivers side does. What fuse or relay should I check? I don't have my owners manuels with me. Thanks.
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  3. James-NZ

    James-NZ F1 Veteran

    Jun 26, 2007
    Hamilton, NewZealand
    Full Name:
    Try a search, there are a few threads here about this.

    Fairly simple thing to work out and fix, I have had mine apart to replace a stripped lift arm. Easy job.
  4. f355spider

    f355spider F1 World Champ
    Rossa Subscribed Owner

    May 29, 2001
    Full Name:
    Hugh G. Rection
    Fuses for headlights are located in the left front part of trunk, above the left front tire. The headlight lifting motor fuse is 7.5 amps. If it is blown, try a 10amp. For some reason, as they age, the motor begins to draw more current. Do not go above 10amp. If it blows with a 10amp, you may need to investigate further, or possibly replace the motor itself.
  5. Robin

    Robin F1 Rookie

    Nov 1, 2003
    Arlington, VA
    Might wanna try the manual lift knob first. My driver's side headlight gets stuck every now and then. A quick twist of the knob, a near loss of fingers, and it's back to normal. Never had to change a fuse...

  6. MRONY

    MRONY Formula Junior

    Mar 17, 2007
    New York City
    Full Name:
    Mike O.
    Had the same problem. Lifted it manually, went to a gas station and bought a box of blade fuses. 7.5Amp. problem solved. The way I checked if it was the fuse was to swap in the one from the working lamp. If it worked, it was the fuse, if not, it was something else (like the motor) and if it blew the fuse, something electric. Thank god it was the fuse. A $1.50 fix. Nice.
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  8. Jeff Pintler

    Jeff Pintler Formula Junior

    Jul 20, 2005
    Full Name:
    Jeff Pintler
    I fixed a friend's car by adjusting the rubber "down" stop as it got harder with age. Not enough that the headlamp rattles but just a little so the stall current is around 6 amps. I figured it out by the fact that fuses would
    blow only in the down position. Take a digital volt meter and measure the current by touching the exposed contacts on the back of the fuses. You rotate the black knob on the motor a little bit so the stop contacts are closed and measure the current using peak hold. I read 11.3 amps after the driver side started blowing a 10 amp fuse (7.5 is stock). The motors draw about 5-6 amp while moving and it is only in the down stop position you get a 8-11 peak
    current. Anyway, you can just feel a slight wiggle on my 348 and so by adjusting the down stop (loosen the lock nut and screw down or CCW from below) you will get less than 7.5 amps. So this is how you fix the blown fuse if the
    10 fuse starts blowing and the normal motor current draw is 5-6 amps. YMMV.

    Jeff Pintler
    89 348tb, 86tr

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