12v DC Pump for Headlight Washers

Discussion in 'The Projects Forum' started by l4c, Jun 27, 2012.

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  1. l4c

    Thread Starter New Member

    Jun 27, 2012
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    Hello

    I'm trying to install headlight washers in my car and I need a few tips.

    What I'm trying to do is this:

    1-Headlight washer pump receives signal from windscreen washer pump trough a relay (got that bit figured out already);
    2-Headlight washer pump runs in one direction for 1 second, stops, then runs 1 second in the opposite direction and stops again. I don't want this cycle to repeat itself even if the windscreen washer pump is still working.
    3- If the windscreen pump stops and later starts working again I want the cycle to repeat itself.

    What I'm trying to achieve is water coming out of one pump exit at the time so I can have the maximum water pressure for each headlight washer.

    I hope you guys can understand what I'm trying to do. What is the easier way to achieve this?

    Thank you :)
     
  2. strantor

    AAC Fanatic!

    Oct 3, 2010
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    you have a pump with one input and 2 outputs?
    Every pump I've seen has one input and one output. So if you ran it forward for 1 sec and then backward for one sec you'd just be moving water around back and forth to the tank.
     
  3. l4c

    Thread Starter New Member

    Jun 27, 2012
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    The electrical connector for the pump has two wires, one 12v and the other one ground.
    The pump has two water exits. If you spin the motor in one direction the water flows trough one exit, if you spin it in the other direction the water flows trough the other exit.
     
  4. strantor

    AAC Fanatic!

    Oct 3, 2010
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    ok so there's 3 hose connections or only 2?
     
  5. l4c

    Thread Starter New Member

    Jun 27, 2012
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    Only two.
    It's a pump like this one:

    [​IMG]

    The pump draws water from the tank through a hole underneath, the pump is mounted directly on the tank.
     
  6. strantor

    AAC Fanatic!

    Oct 3, 2010
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    How were you planning on plumbing it? From what I can tell, you're going to need a directional valve as well, or else you're going to be pumping from the left headlight to the right headlight for 1 sec and then from the right headlight to the left for one sec. How is the pump supposed to draw from the tank?
     
  7. l4c

    Thread Starter New Member

    Jun 27, 2012
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    The motor inside the pump draws water from the tank. When the motor spins in one direction the water flows through one exit. If I reverse the polarity the motor still draws water from the tank but sends it through the other exit instead.

    What I need is something that makes the motor run in one direction for 1 sec, stop, reverse the polarity then run for another sec.
     
  8. ArmbrusterJo

    New Member

    Jun 27, 2012
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    Every pump I've seen has one input and one output.
    [​IMG]
     
  9. l4c

    Thread Starter New Member

    Jun 27, 2012
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    Thanks for your reply buddy, it's really useful to repeat what others just said.
    Anyway, I guess you haven't seen a lot of pumps so there's a pic a few posts up of a pump with two water exits.
    And another one here:

    [​IMG]

    Water enters the pump through the grey pipe and exits trough the white or black one, depending on the spinning direction of the motor inside.
     
  10. BMorse

    Senior Member

    Sep 26, 2009
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    you could probably get away with using a couple of 555 timer IC's and a DPDT relay to create your "delayed" switching......
     
  11. l4c

    Thread Starter New Member

    Jun 27, 2012
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    Thanks for your reply. If you can get me a wiring diagram it would be really useful. I'm fairly new to this stuff.
     
  12. BMorse

    Senior Member

    Sep 26, 2009
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    I will see what I can do for you, right now kind of "busy" with work :)
     
  13. Wendy

    Moderator

    Mar 24, 2008
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    <sigh>

    The owners of All About Circuits has elected not to host discussions of automotive electrical system modifications/enhancements due to safety concerns, the potential of legal ramifications and the possible circumvention of vehicle regulations at the state and federal level.

    This thread is against the AAC forum rules, Chapter 6, as seen here:

    This can be found in our Terms of Service (ToS)

    Automotive modifications of any kind are strictly forbidden. Therefore, this thread will be closed.

    Please try to understand the reasons behind this action, and feel free to browse and use the forums.

    You might find answers to your questions in one of these forums:

    http://forum.allaboutcircuits.com/showthread.php?t=54400

    Another good forum that shares many of the same membership is http://www.electro-tech-online.com/ . Good luck.
     
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