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Re-post of F355 Spider Potentiometer Photos

Discussion in '348/355' started by Aeroengineman, Dec 7, 2006.

  1. Aeroengineman

    Aeroengineman Formula Junior
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    Can someone re-post the Photos of the F355 Spider seat potentiometers given in earlier quotes? One of my Pots has failed and I want to take a wack at getting it fixed, but first I want to see its installed location and what other people have seen for wear on the Pot mechanism. I know this has been posted before but the photos on those earlier threads have expired.
     
  2. gothspeed

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    I would like to see where they are located too. I currently have to move the seats forward with the switches. Then activate the top.
     
  3. Aeroengineman

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    I'd like to see installation shots and proposed repair steps from people who have worked with these things.
     
  4. Aeroengineman

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    Per prior threads, I am looking for the F355 power seat switch in the center console which can be used to activate the seat when the Potentiometer has failed. I need to move the seat to get access to the seat mounting bolts.

    Somebody please help me.
     
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  6. Aeroengineman

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    No - Not the passenger compartment. There are posts on here that refer to an override switch that is inside the console somewhere that can be used to move the seats which bypasses the potentiometer circuitry so that the seat mounting bolts can be exposed.
     
  7. gothspeed

    gothspeed F1 World Champ

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    Are just trying to move your seats for mounting bolt access? As for where the "pots" are located, the drivers side is on the outboard rail. It is visible by looking under the front of the seat. If you have the 355 parts manual, it is part #88 on page 385. I have yet to figure out how to transfer pics from the disc.
     
  8. Aeroengineman

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    I followed a very early post. I will post photos later. The trick is to look under the front of the seat and find the white plug (This is the plug to the Potentiometer) Unplug the white plug only. Turn on the ignition, then activate the seat with the normal switch from the passenger compartment. Power to the seat motor must go through the black plug.

    What I just discovered is that to get a reading on my little Radio Shack OHM meter, I needed to set it on 20K OHMs to read the values in single digits.

    I was able to move the Passenger seat far enough forward to gain easy access to all the bolts however, as luck would have it the bolt underneath the seat belt reel kept twisting and twisting. I removed the seat belt reel to gain access for a flex joint and using an extension it used an impact lug wrench and it spun free.

    The bad news is the seat belt further retracted and I can't extend it to re-install it. I am going to have the seat re-dyed so maybe the seat guy will know how to extend it again.
     
  9. gothspeed

    gothspeed F1 World Champ

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    Good deal! So let me get this straight, if the "pots" are bad the seats will not move with the console switches?
     
  10. Aeroengineman

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    #11 Aeroengineman, Jan 1, 2007
    Last edited by a moderator: Sep 7, 2017
    Yes - Infact the indication that the Pot is bad is when the white plug is connected and the seats won't move. So apparently in my case I unplugged the white plug and the seats move back and forth with the console switches. This is a lot easier than messing with aligator clips trying to independently power the lead to the motor (black -two lead plug in photo next to the white connector) there is another black multipin connector under the driver seat only but I think it has something to do with the seat belt.
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  11. gothspeed

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    On my 355 I guess some one by-passed the pots, because I have to use the console switches to move the seats out of the way then bring the top down.

    I would like to "fix" it so it works like the factory intended. Because if I ever have to sell, I don't want some buyer getting all freaked out because its not perfect.

    I will try to figure out the wiring configuration to acomplish this. These threads are great help and any one with some pertinent knowledge please do post!! :)
     
  12. Aeroengineman

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    #13 Aeroengineman, Jan 1, 2007
    Last edited by a moderator: Sep 7, 2017
    Note there is very slender TORX bit holder required to fit through the Transmission mount frame in the seat. There is an access hole but it is a very small diameter and covered up by the Potentiometer. I got lucky and found the slender TORX bit holder in my junk drawer - or I would have been dead on this project as the frame will not allow you to put a TORX bit on the screw any other way. I also had to buy a 1/4 universal and 1/4 inch extensions to remove the Potentiometer mounting screw which also requires the same Torx bit. You cannot get to the hole in the frame until you remove the Potentiometer and slide it on the shaft away from the Transmission mounting frame. See how the shaft from the motor to the Transmission bends allowing you to remove the opposite end of the drive shaft from its mount, so you can remove the Potentiometer. You need a #20 TORX bit.
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  13. Aeroengineman

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    #14 Aeroengineman, Jan 1, 2007
    Last edited by a moderator: Sep 7, 2017
    This is a series showing the splice of the Ricambi Pot onto the "White Ferrari connector" It also shows the installation of the mounting screw and how you will have to remove the screw with a TORX bit #20 and a 1/4 inch universal joint. I had to spice the White connector from the old Pot onto the new Pot from Ricambi. The new Pot from Ricambi didn't have the same wire color code so I suspect it is a similar spec but it had:

    White wire = Brown (Ferrari)
    White w/Yellow Stripe = Yellow (Ferrari)
    White w/Black Stripe = Pink (Ferrari)

    Here are some OHM readings made from my good (Driver's Seat) Pot:

    Full forward Position:
    Yellow to Brown = 0.51 KOHM
    Yellow to Pink = 4.40 KOHM
    Brown to Pink = 4.63 KOHM

    My driving Position:
    Yellow to Brown = 1.78 KOHM
    Yellow to Pink = 3.05 KOHM
    Brown to Pink = 4.63 KOHM

    Full aft Position:
    Yellow to Brown = 4.09 KOHM
    Yellow to Pink = 0.79 KOHM
    Brown to Pink = 4.63 KOHM

    Ricambi Part set to roughly the same proportions as the Ferrari Pot

    Full aft Position:
    Yellow to Brown = 3.90 KOHM
    Yellow to Pink = 0.66 KOHM
    Brown to Pink = 4.42 KOHM
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