Heater Relay Identification | FerrariChat

Heater Relay Identification

Discussion in 'Technical Q&A' started by moysiuan, Sep 1, 2021.

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  1. moysiuan

    moysiuan F1 Rookie
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    This is an Italmec heater system relay from my Mondial 3.2, also on the Testarossa's and some others.

    Can someone please confirm from the case diagram if this 5 pin relay is an always on or always off relay, or some other type? How would I describe this in order to find a suitable new one by Bosch or Hella, etc.

    Anyone know a Bosch part number this Italmec item crosses to?

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  2. flash32

    flash32 F1 Veteran

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    Normally open ..double output pins

    Sent from my moto g power using Tapatalk
     
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  3. Qavion

    Qavion F1 World Champ
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    #3 Qavion, Sep 1, 2021
    Last edited: Sep 1, 2021
    You would have to know the current rating, too.

    Some relays have a diode or resistor across the coil. I don't know if these would be compatible in this case.

    This FChat thread mentions this Italmec relay with a Bosch equivalent:

    https://www.ferrarichat.com/forum/posts/144093013/

    But this is currently sold out on Amazon and eBay

    https://www.amazon.com.au/BOSCH-Current-Relay-Sportage-2058138/dp/B004Z0WHCA

    Narva has a 40 amp relay with a resistor across the coil:

    https://www.repco.com.au/en/globes-batteries-electrical/electrical-accessories/flashers-relays/narva-relay-12v-30amp-5pin-68024/p/A8468079

    Narva P/N 68024
     
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  4. moysiuan

    moysiuan F1 Rookie
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    #5 moysiuan, Sep 1, 2021
    Last edited: Sep 1, 2021
  5. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #6 Steve Magnusson, Sep 1, 2021
    Last edited: Sep 1, 2021
    Those "maps" are the same relay logic:

    When the 85-86 coil is unenergized (which is how the maps are drawn) = the 30 terminal is not connected to anything, and the two 87 terminals are connected together.

    When the 85-86 coil is energized = the 30 terminal and both 87 terminals are all connected together.

    It should work OK as a replacement for that Italmec (as Ian noted the current rating may be slightly different, but it's a little too simplistic to put a single value as a current rating as the relay manufacturers usually rate life vs current and # of cycles, and there's no real standardization for these ratings -- so what one relay manufacturer calls a "30A relay" may not be exactly the same spec as another manufacturer's "30A relay").
     
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  6. flash32

    flash32 F1 Veteran

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    the relay i showed you has 87 and 87 .. normally open .. i think the diagram (arm) doesn't make a difference
    Check amps though
     
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  7. flash32

    flash32 F1 Veteran

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    we are writing and not seeing each others posts -- sorry for dup info
     
  8. moysiuan

    moysiuan F1 Rookie
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    Thank you, now I understand the maps.
     
  9. moysiuan

    moysiuan F1 Rookie
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    No marking on the Italmec indicating amps...not sure about the 160 number on the case after the 12V reference.
     
  10. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #11 Steve Magnusson, Sep 1, 2021
    Last edited: Sep 1, 2021
    I'm not either, but it could be the coil current in mA (when 12V is applied) -- just a guess. That Bosch 0332019151 is the later plastic case replacement for the stock Bosch 0332014113 metal case relay, and the Bosch 0332014113 is used on many F models for the HVAC blower motor so either the plastic ...151 or metal ...113 should be OK IMO.
     
  11. flash32

    flash32 F1 Veteran

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    #12 flash32, Sep 1, 2021
    Last edited: Sep 1, 2021
    the relays in the testarossa that have same internal config like the one you are referring to have a number of 332014113 ..but i am sure you already knew that - 30amps


    332014113
     
  12. afterburner

    afterburner F1 Rookie
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    #13 afterburner, Sep 2, 2021
    Last edited: Sep 2, 2021
    Make sure the pins are in the same location - there was a difference between the old Italian SIPEA relays and the new purple Bosch unit. I needed to swap round the connections in the socket for the Bosch to work.
    The new brown Bosch ones have the same pin attributions as the old SIPEA.
     
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