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
    That could be the problem. Switch them around and see if the problem follows
     
  2. Joel Fites

    Joel Fites New Member

    Messages:
    4
    Switch them around how? I put a different bulb in and it does the same thing. About to switch the known good ballast over to the side that's flickering.
     
  3. Joel Fites

    Joel Fites New Member

    Messages:
    4
    Figured out its gotta be the ballast. I'll let you know when I get a new one.
     
  4. AlienPrime

    AlienPrime Well-Known Member

    Messages:
    3,058
    Location:
    Sudbury, Ontario, Canada
    Vehicle Model:
    Civic Si HFP
    Body Style:
    2 door Coupe
    sounds like an underpowered ballast trying to ignite the HID bulb without enough amperage throughput.
     
  5. kurodragon

    kurodragon Well-Known Member

    Messages:
    9
    So I'm kinda confused, how did you add that 15 amp fuse. Also with the fused ignition, is that being connected with the switch while while it also runs to the relay?
     
    Last edited: Oct 16, 2014
  6. AlienPrime

    AlienPrime Well-Known Member

    Messages:
    3,058
    Location:
    Sudbury, Ontario, Canada
    Vehicle Model:
    Civic Si HFP
    Body Style:
    2 door Coupe
    15amp fuse runs inline, runs from ignition source powered by car's computer.
     
  7. bumpingblackcivic13

    bumpingblackcivic13 Well-Known Member

    Messages:
    4
    Im finally getting around to doing this. Im just a little lost on where the wires are coming from or going to for the switch. I understand where to wire from the fuse box and where to tap the ignition. Just confused on the wiring between relay and switch, hopefully someone can please explain this a little better.

    What is the purpose of the new relay in this situation? Are the fogs actually pulling power from the new relay since we removed the factory relay?
     
    Last edited: Jun 11, 2015
  8. AlienPrime

    AlienPrime Well-Known Member

    Messages:
    3,058
    Location:
    Sudbury, Ontario, Canada
    Vehicle Model:
    Civic Si HFP
    Body Style:
    2 door Coupe
    so you dont burn out ballasts with factory switchin you use aftermarket 40A relay with 30A fuse. Power comes independent, to switching relay and then from signal; wires from OEM headlamp control into relay to do the switching. Factory honda wiring can't candle proper current inrush for ballast, and hence people blow ballasts. (i've had the same bulbs and ballast since day one of my car) which has been 3 years on June 23rd
     
  9. bumpingblackcivic13

    bumpingblackcivic13 Well-Known Member

    Messages:
    4
    I understand how to wire the relay and switch, got that figured out. Only thing im confused about is how the OP is using the tapped ignition wire as his signal lead and power source lead for the new relay. I much rather be pulling power from the battery than the main ignition wire for the fog lights. If im not mistaken the new purple wire is the new power source to the fogs, just want to make sure i'm interpreting his diagram right?
     
    Last edited: Jun 14, 2015
  10. boejoula

    boejoula Well-Known Member

    Messages:
    215
    Vehicle Model:
    Civic Si
    Body Style:
    Sedan
    Reason for me using the ignition wire is so if I ever forgot to shut the fogs off they would just shut off with the car.
     
    aZnCdn likes this.
  11. Straightshot7

    Straightshot7 Well-Known Member

    Messages:
    19
    Wanting to do the mod on my 2014 civic si sedan, I'm wanting to do the stalk method to keep factory switch as on and off, can I get some help in how to wire this, I read a forum on the 8th gen on splicing into the purple wire on stalk plug, then running a wire down to fog relay, cutting a orange one and connecting wire from stalk to other orange one which runs into relay, now I can't seem to fine the relay on my car, it looks like a different location then the 8thgen, I would like to be as simple as possible vs running new relay. Do u think I could splice purple wire and just run to a empty 12v fuse spot that's constant when cars on
     
  12. Straightshot7

    Straightshot7 Well-Known Member

    Messages:
    19
  13. Straightshot7

    Straightshot7 Well-Known Member

    Messages:
    19
    I was thinking would it work if u was to just take the wire u added to fog relay and run it to a 12v switched in then same fuse box and just do a ad a fuse, that should keep factory switch intack and have independent control without getting under dash or splicing wires
     
  14. Redrocket1

    Redrocket1 Well-Known Member

    Messages:
    149
    Location:
    Kalamazoo, MI
    Vehicle Model:
    Civic Si
    Body Style:
    Coupe
    I suspect that the part number 7 on this diagram is the wiring harness which interacts with the headlight/foglight stalk. The part number is 77901TR0A60 (for Sedan). If anyone can dig up an electrical diagram for this harness, I could figure out exactly how it needs to be modified. But otherwise, someone would have to figure out what each wire does using a multimeter. If I were dedicated to doing this mod, I would carefully take apart my steering wheel to expose this wiring harness (if necessary). Then I would find which wires are the switch input and output for the foglight switch. Then I would buy a new harness and modify it.
    I'm personally not interested in doing any of this, because I'm not comfortable messing around with the steering wheel, with the airbag and all.
    But yeah can anyone get electrical diagrams??
    [​IMG]
     
  15. Straightshot7

    Straightshot7 Well-Known Member

    Messages:
    19
    Thanks for reply, well I actually just tried this today, the fuse box idea didn't work like I had hoped, so then I did take apart the steering wheel plastic covers and looked at the harness, I started to use a multimeter and tried to figure out what wire was what but I suspect that these are just low voltage trigger wires because when u switch on fogs back and forth at the relay trigger it wasn't reading much volts at all so I was worried that if I was to try and send 12 volts to this wire I would risk damaged so i decided to just go a head and add a hidden switch to turn them off and on, now just jammed a wire down into relay under the hood and ran the wire into the cab today, ran out of time, will finish tommorow, but I'm going to just run a switch only with a fuse from 12v ingnition, I won't run a new relay, don't see why I would need to? I will be running led fog projectors soon so no hids in my fogs so shouldn't have to worry about blowing ballast
     
  16. Redrocket1

    Redrocket1 Well-Known Member

    Messages:
    149
    Location:
    Kalamazoo, MI
    Vehicle Model:
    Civic Si
    Body Style:
    Coupe
    How about posting instructions for taking apart the steering wheel, and I might take a look.
     
  17. 9gensoSiety15

    9gensoSiety15 Active Member

    Messages:
    1
    What is the wiring for this I have spent the last 3 hours I've wired fogs before but never done it this way what wire goes were exactly? Because the relay drawing doesn't help at all and neither does the pictures? Thanks for the help
     
  18. aZnCdn

    aZnCdn Well-Known Member

    Messages:
    20
    I would like to attempt this on my 2013 Civic Si. I have read this thread and it seems like what we need to do is run a hot wire to the switch in the dash (which opens/closes the circuit). Then run that wire to the fuse box in the engine bay which is the male spade which powers the fogs. Do I have this right? If that is the case can I just tap the ignition (orange) switch and run that directly to the male spade which would mean my fogs are on any time the ignition switch is turned on?

    Thanks in advance for your help!
     
  19. DarkKnight38

    DarkKnight38 Member

    Messages:
    17
    Nice! It looks great!
     
  20. webby
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    did you see this?
     

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