85, 86, 30, 87 & 87a?

  1. Shedendman

    Shedendman Member

    Messages:
    4,416
    east sussex
    Why these numbers?
    Now,i'm going to fit some work/spotlights to the back of the van,i've done my home work,read this and understood what each does and why
    https://www.12voltplanet.co.uk/relay-guide.html
    I'm going to follow this method in doing so
    https://i.pinimg.com/736x/5f/0e/b7/5f0eb786e612fa50dd4e41395d751513--circuit-diagram-jeep-stuff.jpg
    Now i have a relay with 5 pins with a built in 30amp fuse but my wires are different colours(if that didnt confuse me even more),i've done/copied me layout on paper and pretty sure i'm good to go
    BUT
    I have a question
    Why those numbers,why not 1234/4a or 12345 or even still,letter them?:dontknow:
    Just curious thats all:)
     
  2. barking mat

    barking mat Barking at Pigeons

    Messages:
    4,605
    Location:
    Brittany, The Arz Valley.
    Pictures of the relay would help..
     
  3. barking mat

    barking mat Barking at Pigeons

    Messages:
    4,605
    Location:
    Brittany, The Arz Valley.
    It's normally self explanatory with the circuit diagram.
     
  4. mtt.tr

    mtt.tr Member

    Messages:
    4,013
    Essex England
  5. Shedendman

    Shedendman Member

    Messages:
    4,416
    east sussex
    Help with what?
    Those are the numbers on the back of it,like i said i've done my homework on what goes where just curious to know why pick those numbers,thats all
     
  6. barking mat

    barking mat Barking at Pigeons

    Messages:
    4,605
    Location:
    Brittany, The Arz Valley.
    I'll get some photos at work tomorrow if you are still lost.
     
  7. hotponyshoes Member

    Messages:
    3,373
    Location:
    Somerset. Uk
  8. mtt.tr

    mtt.tr Member

    Messages:
    4,013
    Essex England
    Wake up already posted that link. Hehe
     
    hotponyshoes likes this.
  9. Shedendman

    Shedendman Member

    Messages:
    4,416
    east sussex
    Hopefuldave, mtt.tr and barking mat like this.
  10. hotponyshoes Member

    Messages:
    3,373
    Location:
    Somerset. Uk
    It's still useful to know with the modern stuff.
    Random example but if you want to change the ECU coding for door mirror folding on a vw transporter the software gives you the option of choosing terminal 15 or not. Head scratching until you check that list and can see that 15 is controlled by the inigition switch.
     
    Shedendman and mtt.tr like this.
  11. xstian Member

    Messages:
    59
    Location:
    Norfolk
    Also, I would imagine your relay has the capability of switching a 30a load rather than having a 30a fuse built in, although I'm sure you could probably get such a device.

    So you will still need to fuse the circuit, the size will depend on a number of things, but ultimately the item with the least current carrying capacity.
     
  12. Shedendman

    Shedendman Member

    Messages:
    4,416
    east sussex
  13. xstian Member

    Messages:
    59
    Location:
    Norfolk
    I said you could probably get such a device. My apologies, it looks like you are all all over this.

    It's surprising the amount of people who think because something has a current rating written on the side, it must be fused.
     
    Hopefuldave likes this.
  14. hotponyshoes Member

    Messages:
    3,373
    Location:
    Somerset. Uk
    Those relays with inbuild fuse holders should follow the same numbering system as all the others.

    I dont like them as the fuse contacts seem to corrode easily but mount it in a dry location and it should be fine.
    You might want to swap the fuse for a lower rating though (depending on the power of the lights) and wire it directly from the battery or an accessory circuit rather than piggyback from something important
     
    slim_boy_fat, Shedendman and mtt.tr like this.
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