Facet Fuelpump & Seatswitch question | FerrariChat
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Facet Fuelpump & Seatswitch question

Discussion in '308/328' started by Helmut, Nov 23, 2009.

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  1. Helmut

    Helmut Formula Junior

    Dec 11, 2004
    640
    #1 Helmut, Nov 23, 2009
    Hi,

    I have 2 questions. One is how do you install the facet fuelpump correctly on a 78 308GTS? The OM wiring diagram shows the green/black wire to the pump and also a ground wire from the pump, but the facet only seems to have a ground wire sticking out of it. How does it get voltage?

    Second question is.... How many of you have disconnected the switch in the drivers seat that is linked with the fuelpump?

    Forever curious,

    Helmut
     
  2. maurice70

    maurice70 F1 Rookie

    Jan 25, 2004
    4,334
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    maurice T
    #2 maurice70, Nov 23, 2009
    Helmut if you could post a pic of the pump it would be helpful but with out seeing it I would have to guess that either (a)the wire is insulated and has two wires in it,one for ground and one for 12v(b)the body of the pump is the ground and the wire you are seeing is the 12v
    Sorry dont have an answer for the seat switch
     
  3. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,105
    Cowboy Capitol of the World
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    Brian Crall
    #3 Rifledriver, Nov 23, 2009
    The one wire is B+. The body of the pump is ground. A wire was attached for ground because the pump was rubber mounted.

    The vast majority of the seat safety switches were bypassed when the cars were very new by us mechanics. We go tired of the cars running out of gas when servicing them.
     
  4. Helmut

    Helmut Formula Junior

    Dec 11, 2004
    640
    #4 Helmut, Nov 23, 2009
    Last edited by a moderator: Sep 7, 2017
    Thanks guys!, I uploaded a picture of the pump.

    Ahh thats what I thought, so that means the green/black cable connects with the black cable thats coming out of the Pump? and if I use rubber mounts (which I am) I have to add a cable from the pump-body to ground?

    Please explain, why would they run out of fuel? was the fuelpump running out of control due to that switch?

    Thanks!
    Helmut
    Image Unavailable, Please Login
     
  5. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
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    Brian Crall
    #5 Rifledriver, Nov 23, 2009
    With no one in the seat the pump would quit running and the carbs would run out of gas.
     
  6. Helmut

    Helmut Formula Junior

    Dec 11, 2004
    640
    #6 Helmut, Nov 23, 2009
    Lol, I just realised that I was being a bit slow there, dohh. :)

    Thanks,

    Helmut
     
  7. ME308

    ME308 Formula 3

    Nov 5, 2003
    1,550
    Munich, Germany
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    Michael
    #7 ME308, Nov 23, 2009


    does anyone have a picture of this switch...or of the corresponding bypass ?
     
  8. maurice70

    maurice70 F1 Rookie

    Jan 25, 2004
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    maurice T
    #8 maurice70, Nov 24, 2009
    Michael I could be wrong but I think it only applied to US cars
     
  9. BigTex

    BigTex Seven Time F1 World Champ
    Owner Rossa Subscribed

    Dec 6, 2002
    79,386
    Houston, Texas
    Full Name:
    Bubba
    #9 BigTex, Nov 24, 2009
    All of mine have a little "u shaped" wire jumper made up and jammed into the plug leading to the seat switch.

    I kicked it out accidentally once, at a Buddy Guy show, and had to walk home....:D
     
  10. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
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    Brian Crall
    #10 Rifledriver, Nov 24, 2009
    Yup. American crash standards.
     
  11. ME308

    ME308 Formula 3

    Nov 5, 2003
    1,550
    Munich, Germany
    Full Name:
    Michael
    #11 ME308, Nov 24, 2009
    Last edited: Nov 24, 2009
    he, he... ;)

    so...the heavier the driver, the more gas flows and the faster the old 2v :D
    (btw my car is a US 2v)
     
  12. Paul_308

    Paul_308 Formula 3

    Mar 12, 2004
    2,345
    #12 Paul_308, Nov 24, 2009
    Boy that takes me back. I haven't heard/seen any reference to B+ in probably 40 years.

    For the generationally challenged under 60 who don't know about cavemen's radio/tv tubes, 'A' was filament voltage, 'B' was plate voltage, and 'C' was grid bias voltage. Ground was negative for 'A' and 'B' supplies, so B+ was the predominant positive voltage which ran things.

    Even when transistors replaced tubes and their filaments were history, B+ lingered on for a short while, a couple centuries back.

    This do date RifleDriver as a wise old technical savy gent.
     

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