blower switch need 91 TR | FerrariChat

blower switch need 91 TR

Discussion in 'Technical Q&A' started by tommie, May 20, 2013.

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  1. tommie

    tommie Rookie

    Feb 28, 2013
    42
    need a blower control switch for 91 testarossa
    anyone have one ?
     
  2. ferrarioldman

    ferrarioldman Formula 3
    Professional Ferrari Technician Silver Subscribed

    Jun 19, 2002
    1,032
    Summerfield, NC
    Full Name:
    Tom Jones
    I believ I have one at the shop. Will check tomorrow.
     
  3. ferrarioldman

    ferrarioldman Formula 3
    Professional Ferrari Technician Silver Subscribed

    Jun 19, 2002
    1,032
    Summerfield, NC
    Full Name:
    Tom Jones
    #3 ferrarioldman, May 21, 2013
    Last edited by a moderator: Sep 7, 2017
    We do have a used unit that we purchased many years ago but never used it. The parts book shows the possibilty of 3 different switches but I do not know what the part # is for this particular one. PM me if you are interested.
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    peteficarra likes this.
  4. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,782
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #4 Steve Magnusson, May 21, 2013
    Last edited: May 21, 2013
    By the process of elimination, I believe that the part that Tom posted is part number 131473 (used on early TR).

    Here are photos of the other two TR AC blower fan speed switch ECUs:

    134128 (6 wires - with replaceable 1A fuse socket)
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    140151 (4 wires - no fuse)
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    Since the OP is looking for a "91", my guess would be that he/she needs 140151 (but he/she should be able to confirm/deny from the photos, and thanks for posting yours Tom -- I didn't have a photo of that one).

    tommie -- how do you know this? Is the symptom:

    1. no blower speed works,

    or

    2. full speed works OK, but no speed below full speed works?

    If #2, it's more likely IMO that the power transistor has failed.
     
  5. Motob

    Motob Formula 3
    Professional Ferrari Technician

    Nov 11, 2003
    2,365
    Frederick, Maryland
    Full Name:
    Brian Brown
    In addition to the power transistor failure, there is also the fuse that Steve mentioned on the early switches that can blow. You can the socket for it on the two earky switches above.
     
  6. tommie

    tommie Rookie

    Feb 28, 2013
    42
    it is the 140151 fan switch that i need
    i did change the transistor and only get high speed on the fan after a delay.
    i still do need a replacement for car #2
    thanks
    if there is any way to build or improvise a different set up for the switch please someone let
    me know
    thanks
     
  7. tommie

    tommie Rookie

    Feb 28, 2013
    42
    does anyone know the value of the double pots for this control and possibly where to get a replacement
    thanks
     

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