Help with circuit design for intercooler spray for my car

Discussion in 'The Projects Forum' started by johnclem88, Feb 6, 2012.

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  1. johnclem88

    Thread Starter New Member

    Feb 6, 2012
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    Hi I'm new so please be nice :)

    Ill get strraight to the point of what im trying to acheive...

    Basically my car has headlight washer system. so basic circuitry would be a relay that uses current from the headlights as the constant live (when headlights are on) to activate the relay, and then i presume the stalk switch as the switched live to make the circuit to send current to the motor to actually spray the headlights.

    What I want to do is fit a motor that is bi-directional (reverse polarity to make it spin in opposite direction so therefore i have 2 outputs that work indepentantly...effectively) however there is only 1 pair of terminals so relays must be used to allow the switch in polarity.

    I want to be able to wire in a switch of my own that when i activate, take the headlight washer wiring circuit out (normally closed relay that then opens with current from the switch i have added, making it redundant) and then another 2 relays that are normally open to close as they receive the same current that are wired onto the motor the opposite way round (so + to - and - to +etc) so the motor will then recieve current to spin in the opposite direction but the current that is being passed to it is not then travelling back up the circuit to the standard washer switch.

    Does this make sense? and is it not necessary, and can i just wire in relays that close with current activated by my switch and not worry about the current travelling back up to the standard switch?

    Thanks

    John
     
  2. johnclem88

    Thread Starter New Member

    Feb 6, 2012
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    And am i also right in thinking if i did need to do the whole 4 relay system that some sort of time delay would be needed in order to delay the normally open relays from closing as the normally closed relays open. And then when I deactivate the switch, the opposite happens, so the normally closed relays stay closed giving time for the normaly open relays to re open...over a matter of milliseconds
     
  3. tommydyhr

    Active Member

    Feb 3, 2009
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    I'm afraid any discussion related to automotive application / modification is strictly prohibited on this forum, so we aren't able to help you with this issue.
     
  4. Experimentonomen

    Member

    Feb 16, 2011
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    Yes, any automotive related content is against the forums "Terms of Use"
     
  5. SgtWookie

    Expert

    Jul 17, 2007
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    Actually, the paragraph reads:

    ...with the relevant bullet item being bolded.
     
  6. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    I am closing this thread as it violates AAC policy and/or safety issues.

    Quote:
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    Any kind of over-unity devices and systems
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    There will be enough sites where automotive questions can be discussed :
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    Bertus
     
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