New to me 456mgta

Discussion in '456/550/575' started by ross, Sep 10, 2017.

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  1. ross

    ross Two Time F1 World Champ
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    Mar 25, 2002
    22,129
    houston/geneva
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    Ross
    Picked up the car (for my mother) in Vegas as planned. Ran it for the first time in earnest today. After having one of these you would think I would know how to fix a few things, but I don't and I can't find my answers in the owners manual either.

    So here goes
    - radio will not go on. Cannot find where the fuse is to check it. My previous one had an after market unit so I am unfamiliar with oem. What am I missing?
    - the drivers seat stopped allowing me to move the bottom of the seat forward. There is no separate fuse for this one motor so am I to assume that forward motor is just shot? It moves back but not forward.
    - there is a wire and a socket up by the rear view mirror. I need to ask the previous owner what that is. Any ideas in the meantime?
     
  2. henryr

    henryr F1 World Champ
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    Nov 10, 2003
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    Juan Sánchez Villa-L
    i know u had a 456 before but is this your first auto ?

    got mine back from a full service and some "tinkering". really impressed with the auto trans and the way the car drives.... (we dont need no stinking f1)
     
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  3. ross

    ross Two Time F1 World Champ
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    This is my mothers car, she wanted an auto and this was the most modern one. So I picked it up and will be delivering it to her.

    I don't love the car - frankly I think the auto tran kind of sucked the drama out of the car. It is perfectly competent but the absence of more precise control over acceleration etc is not for me.

    But the issues I mentioned above would be the same for either car.
     
  4. asgor

    asgor Karting

    Sep 8, 2016
    114
    Virginia, USA
    #4 asgor, Sep 11, 2017
    Last edited: Sep 11, 2017
    1) Check the fuses in the passenger foot well and if no dice then it's likely the main radio unit in the trunk to which the face plate in the cabin is connected. Wait... at least that is true for 1995-97 models: in case of an M I believe the radio unit is all in one and slides as a single unit into the tunnel. On 1995-97 models (non-M) to access the main radio unit you need to remove the carpeted "shelf" on the left of the trunk space - held together with small screws. If that is defective (or the face plate) it can be repaired.

    2) If only one element of the seat can't be powered it's probably one of the potentiometers that controls the range of motion of its various parts. Do a search on this forum but the fix could be slightly complicated. Replacement seat pots are both expensive and hard to find.

    3) No idea: definitely an aftermarket add-on - I bet it's for a radar detector.
     
  5. fiorano#7

    fiorano#7 Rookie

    Jun 22, 2008
    43
    Ohio
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    Robert
    Yes, I love my 456 Auto. Love my 355 F1 but that's for another drive. The 456M GTA is really quite a car and a great buy these days. A bit of a pain when comes to electrics but great to cruise down the freeway or back roads at speed. A radar detector is a good idea you will find yourself cruising in triple digits.
     
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  6. fiorano#7

    fiorano#7 Rookie

    Jun 22, 2008
    43
    Ohio
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    Robert
    Don't be afraid to manually shift it with Sport turned on!
     
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  8. ttforcefed

    ttforcefed F1 Veteran
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    Aug 22, 2002
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    so when you say its ur mothers - thats pretty cool - how will she use it?
     
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  9. of2worlds

    of2worlds F1 Veteran
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    The General Motors Designer Chuck Jordan really enjoyed his 456.
    What color combination is the 456 A for your mother?
     
  10. killer58

    killer58 Formula Junior
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    Jun 30, 2010
    374
    Ross,
    My seat did the same thing on delivery. Ended up being the connector to the seat switches. Just re-seating it did the trick.
    If your car has an OEM Becker, the fuse is on the back of the head unit. Also try re-seating the faceplate and cleaning the contacts.
    I second the radar detector guess.
     
  11. ross

    ross Two Time F1 World Champ
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    It will be her daily
     
  12. ross

    ross Two Time F1 World Champ
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    T
    Titanio over carbone. Same as my old one I sold in Switzerland.
     
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  13. ttforcefed

    ttforcefed F1 Veteran
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    Aug 22, 2002
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    thats awesome - have you posted any pics?
     
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  15. of2worlds

    of2worlds F1 Veteran
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    Thank you for sharing those details.
    That is rather ironic to have another 456 in the same color combination. Sort of like seeing a familiar face far from home!
     
  16. ttforcefed

    ttforcefed F1 Veteran
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    you going to put a new set of wheels on it for her?
     
  17. ross

    ross Two Time F1 World Champ
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    it already has the 575 wheels on it like i had, so it is really a carbon(e) copy of mine - other than the gearbox.

    pics of the trip home in the silver thread
     
  18. ross

    ross Two Time F1 World Champ
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    the previous owner got back to me on the wire - rally trip odometer.
    the radio mystery was solved by the tech at boardwalk in dallas.
    the seat potentiometer needs looking at - may get around to it today. where is this connector to the seat switches?
     
  19. killer58

    killer58 Formula Junior
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    Jun 30, 2010
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    Hope yours is as simple.
     

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  20. ross

    ross Two Time F1 World Champ
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    Mar 25, 2002
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    ok. next question....how do you get at that connector? can you remove the witch on the outside of the seat and pull the connector out and see if it is attached to anything? or do i need to get at it from underneath?
     

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