355 coolant temp red light? | FerrariChat

355 coolant temp red light?

Discussion in '348/355' started by Carmellini, Dec 30, 2020.

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  1. Carmellini

    Carmellini Formula 3

    Jul 16, 2019
    1,004
    Here is an easy one...lol:

    prior to start, with key in on position, is the coolant temp red warning light illuminated?
     
  2. Qavion

    Qavion F1 World Champ
    Silver Subscribed

    Feb 20, 2015
    14,402
    Sydney
    Full Name:
    Ian Riddell
    If it does, the wiring diagrams need amending. Probably the wire has fallen off the sender.

    Someone posted this photo for the F1 car...

    Image Unavailable, Please Login
     
  3. Carmellini

    Carmellini Formula 3

    Jul 16, 2019
    1,004
    hmmm.......mine is not on, but the warning light for my oil pressure lights up with key on, and then goes off after start up.
    I assumed that the warning light for coolant temp would light up in the same fashion.....????
     
  4. Qavion

    Qavion F1 World Champ
    Silver Subscribed

    Feb 20, 2015
    14,402
    Sydney
    Full Name:
    Ian Riddell
    Oil pressure comes on because oil pressure is low (prior to start).
     
    Beetle likes this.
  5. Beetle

    Beetle Formula Junior

    Apr 10, 2013
    776
    Coolant temp light would only come on if over temp! It's a simple earth sender unit I believe
     
  6. Qavion

    Qavion F1 World Champ
    Silver Subscribed

    Feb 20, 2015
    14,402
    Sydney
    Full Name:
    Ian Riddell
    Probably some kind of bimetallic switch hooked up to the coolant sensor case (which is earthed).
     
  7. Carmellini

    Carmellini Formula 3

    Jul 16, 2019
    1,004
    OK that makes good sense.....issue solved. I recently replace some light bulbs and I couldn't remember if that light came on prior.
    now I know.... Thanks.
     
    Qavion likes this.

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