DIY 2012 Civic Si Independent Fogs (picture heavy)

Discussion in 'Lighting DIY' started by boejoula, Dec 5, 2012.

  1. boejoula

    boejoula Well-Known Member

    Messages:
    215
    Vehicle Model:
    Civic Si
    Body Style:
    Sedan
    This si my first DIY so i apologize ahead of time!

    You will need to purchase:
    An external switch
    A relay
    Blue male spade
    Yellow T-Tap
    15AMP Fuse

    First thing you want to do it locate the factory fog light relay. It is under the hood, on the right side of the engine bay.

    [​IMG]

    On the right side of the fuse box you will see the relays. You want the 5th fuse from the top, pull it out (to double check this is the correct fuse turn the fogs on and make sure they dont come on). Your going to use a male spade connector without the plastic to plug into where the power was fed by the factory relay. I used a 16 gauge wire.


    [​IMG]
    Drill a hole just big enough for the wire to fit on the side of the fuse box and feed the wire through. Your going to run this along the loomed wires on the outside of the fuse box towards the headlight.


    [​IMG]

    You want to go under the rad support and into the fender. Here's where you want to take the fender liner out/down on the right side of the wheel well. Refer to http://9thcivic.com/forum/threads/resonator-delete-si-sedan.4811/ for pics of the wheel well liner (THANKS@smokedditty) YOU WILL BE REMOVING THE 3 PIECES HE HAS MARKED WITH AN X

    Once you get the liner out of the way, lightly wire tie the new fog light wire to the hood latch so it doesn't dangle. Right under the gromet for the hood latch is an empty gromet the you will drill a small hole through to get your wire into the car

    [​IMG]

    This is the other side of the gromet, again, right below thr hood latch cable.

    [​IMG]

    Now your going to want to get the switch and relay.

    First, remove the under dash panel
    http://www.collegehillshonda.com/instructions/civic/2012/4dr/ambientlightsi.pdf page 3

    T-tap the main ignotion wire. It is the orange wire at the top of the interior fuse box

    [​IMG]
    Wire up the switch depending on what type of switch you have. My switch looks like this:

    [​IMG]
    And the wiring (leave a little slack on the wire for reinstalling the panel):

    [​IMG]
    This is the wiring diagram for the relay

    [​IMG]

    Once its all wired up, connect your new fuse and test these bad boys


    [​IMG]
    Not sure how to do this on models without factory fogs but i would imagine it to be the same.
    Any more questions, ask them here or send me a PM. happy to finally give something back to the community!

    webby i hope this is up to par for the DIY. Enter me into the next contest please!!
     
  2. webby
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    nicely done :thumb:
     
  3. 2fast4u2

    2fast4u2 Well-Known Member

    Messages:
    1,022
    I'm diggin' this. And yea, what Webz said. Nicely done!
     
  4. TheKhmerboy92

    TheKhmerboy92 Well-Known Member

    Messages:
    252
    Location:
    Connecticut
    Vehicle Model:
    Honda Civic SI
    Body Style:
    Sedan
    nice DIY.
     
  5. webby
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    no need to link back and forth. Focus on what's going on here/there and it'll just be that way. There is a very bad history between the two, we'll leave it at that.
     
  6. hotshot

    hotshot Well-Known Member

    Messages:
    663
    In to see if someone cracks the control stalk method.
     
    squiggy likes this.
  7. boejoula

    boejoula Well-Known Member

    Messages:
    215
    Vehicle Model:
    Civic Si
    Body Style:
    Sedan
    You may be able to but i don't remember If it all worked internally. You cut the wire from the stalk and use that to trigger the relay. You would have to wire the relay differently. I can make a diagram for that if you would like. Still would have to run the wire out to the fuse box. But after all that, it may still only work with the headlights
     
    shimp likes this.
  8. Brooksie365

    Brooksie365 Well-Known Member

    Messages:
    820
    Location:
    Worcester, Ma
    Vehicle Model:
    Civic Si
    Body Style:
    Sedan
    is there a diagram of the original relay? just curious i know it was mentioned but you should be able to jump the positive of the relay to the signal from the relay correct? or is this different from a standard automotive 5 prong relay?
     
  9. Glockcoma

    Glockcoma Well-Known Member

    Messages:
    298
    Location:
    Columbia Station OH
    Vehicle Model:
    Civic Si
    Body Style:
    Coupe
    is there an east way to just wire then into your park lights??? so your two corners and fogs come on at same time?
     
  10. webby
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    Brooksie365 likes this.
  11. Brooksie365

    Brooksie365 Well-Known Member

    Messages:
    820
    Location:
    Worcester, Ma
    Vehicle Model:
    Civic Si
    Body Style:
    Sedan
    webby you are a gentlemen and a scholar
     
    webby likes this.
  12. Glockcoma

    Glockcoma Well-Known Member

    Messages:
    298
    Location:
    Columbia Station OH
    Vehicle Model:
    Civic Si
    Body Style:
    Coupe
    truly is!! as always webby I appreciate your efforts! :bananasplit:
     
    webby likes this.
  13. webby
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    :wavey:
     
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  14. Chacaro

    Chacaro Member

    Messages:
    8
    Location:
    Costa Rica
    Vehicle Model:
    civic Si
    Body Style:
    coupe
    Hello all,

    Im not that good with the wiring and so on, but i really want to turn on the Fog light without using the headlights but i saw that the way was using an extra switch to turn on and off; is there a way on doing this using the factory switch?

    Any help will be really appreciated, thanks
     
  15. trustdestruction

    trustdestruction Well-Known Member

    Messages:
    811
    Location:
    Tampa, FL
    Theoretically you should be able to do the stalk method by changing the wiring on the relay so that it receives a constant 12V signal when the car is on, rather than a 12V signal that relies on the low beams being on.
     
  16. Chacaro

    Chacaro Member

    Messages:
    8
    Location:
    Costa Rica
    Vehicle Model:
    civic Si
    Body Style:
    coupe
    So basically will be using the original wiring and adding or changing the 12v signal?

    thanks
     
  17. trustdestruction

    trustdestruction Well-Known Member

    Messages:
    811
    Location:
    Tampa, FL
    Well, a relay works like this in general:

    Most commonly I have seen they are 4-pin relays.

    So logically, in our case we have the following for the relay:
    1. Ground
    2. Positive 12V output to Foglights - this is what the relay controls
    3. Positive 12V input from Power Source that will power foglights
    4. Positive input from the Switch - that will trigger the relay and complete the circuit inside of it sending power from #3 to #2 (numbers are for this example only)
    So, the #4 is coming from the foglight switch on the steering column. It seems that on the other side of the foglight switch, the headlight switch controls whether or not there is even 12V going to the foglight switch to be sent to the foglight relay.
    My guess is that you could easily get under the steering column, and then splice the positive wire that feeds the foglight switch into the 12V that feeds the low beam switch (or any constant 12V for that matter, but this is the safest/easiest method), which would bypass the foglight switch's dependence on the low beam switch.
     
  18. hotshot

    hotshot Well-Known Member

    Messages:
    663
    Cool. Wanna test that?
     
  19. trustdestruction

    trustdestruction Well-Known Member

    Messages:
    811
    Location:
    Tampa, FL
    Eh, I have no desire for this functionality and I don't want to hack up my wiring. Sorry. Just trying to help.
     
    Last edited: May 16, 2013
  20. Chacaro

    Chacaro Member

    Messages:
    8
    Location:
    Costa Rica
    Vehicle Model:
    civic Si
    Body Style:
    coupe
    Looks good, however should the relay go before the factory one right? so the circuit can be done before?
     

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