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So i just bought my 04 Si with 50k miles on it the color is Si blue with the HFP from factory. Anyways theres a black switch on the right side of the shifter. The previous owner didnt tell me what it was and i cant figure out what it is. Anybody wanna inform a newb? thanks in advance.

 
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Would you be able to provide a photo?

 
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Overdrive? Not sure, picture plz.

 
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i'm assuming it would be nothing just a plug, probably an optional thing, check with dealer for interior options

 
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overdrive on a manual? Did si models come with automatics?

 
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Hell naw! From the pic you provided, it might just be nothing. But the OP said it's a switch. That's why we need a pic from their car. My Si has a piece of plastic covering a hole for my car. Don't know what's suppose to go there. Might have been a feature on another model or something. I dunno. Hopefully he/she gets back to us.

 
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Cute cat, what's its name

 
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Its right where the plastic plug is. Ive switched it a couple times while driving and didnt notice a difference of any sort. I figured all Si's had the switch. Ill post a pic though

 
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My bad I got confused with Canadian SI again... figures... it might be a switch he put in .. not sure don't know much about SiRs (ha)

 
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Did the previous owner say anything about having underglow or even neon tube lighting inside the car before? This could have been the switch for those. Or Nitrous lol.

Or maybe it's for stealth mode when running from the cops and sends out a radio jamming frequency to deter any pursuers?

 
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It could also be the emergency eject button, standard equipment on Civics.

 
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haha funny you mention the cops. i just had a run in passing a car going about 110 then wham statey. he turned around but didnt turn his lights on so i took off like smokey and the bandit. anyways im thinkin maybe its the rear defroster or somethin it doesnt look too aftermarket.

 
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Nah, the rear defroster would be the button next to the A/C

 
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Now I could be wrong but I'm pretty sure that's an additional button like most civics have. It's just more promenant on the higher dash and he probably installed something there that he removed. Who knows what it was, you'd have to ask him It doesn't look like it serves a function OEM. ( I could be wrong, not a lot of Si owners here though )

Now, have you tried PUSHING the button?

 
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This guy is using it as an MP3 holder:

http://www.mp3car.com/show-off-your-...i-install.html

This guy has it as his hazards:

http://www.google.ca/imgres?imgurl=h...w=1680&bih=878

12v plug?

http://www.google.ca/imgres?imgurl=h...w=1680&bih=878

Not sure?

http://www.flickr.com/photos/one9us/5247162410/

Temperature gauge?:

http://www.google.ca/imgres?imgurl=h...w=1680&bih=878

 
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Pull the panel and see where the wires go. Chances are it's for some kind of aftermarket accessory. Let's see a pic.

 
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Looks like he moved his hazard over to make a more accessible "engine start" button. Rather then having it on the passenger side he put it on the driver side (which makes more sense).

That looks like the stock "nothing is here right now, add what you want later" spot.

like this in our non si 7th gens (next to the 12v input):

http://i217.photobucket.com/albums/c...aluminum-1.jpg

 
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Only thing I could find factory was #14: http://www.hondapartscheap.com/south...t=0&quantity=0

 
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There's no doubt in my mind that it's aftermarket. Just need to see a picture to know WHAT it is

 
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Heres you pic. It doesnt look aftermarket at all to me. maybe it is though. Id tear the dash apart but am not thatttt worried about it. maybe someone else has it who knows.

 
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IIRC, that rounded rectangular popout is actually for a Fog Light Switch, for factory fog lights.

 
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Definitely aftermarket. I have one sitting on my computer stand right now, just too lazy to take and download a pic. lol

Only way to find out is to chase the wires- unless you switch it on and something happens.

 
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Well not just for fog light, because I've got multiple spots to do so

 
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Yeah in this case it isnt the fog lights. i have a switch by the cruise control for that. Ill chase it when i get a new head unit eventually. thanks for the efforts haha