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Old Apr 6, 2010, 02:06 PM
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Request: Independent Fog Light Mod

I was wondering does anyone have any idea how to make the fog lights independent of the low beams? So they can be run with DRLs etc
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Old Apr 6, 2010, 02:26 PM
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not sure if there is another way, but if you wanted, its just a matter of cutting the positive power wire to the fogs, adding a switch or button somewhere in the car, and then tapping a fuse or other power source so you can manually send power to the fogs.

as for tapping into the fog power wire, you can use the blue wire that runs from connector c-312 which is on the bottom left of the etacs ecu or you can use the blue wire with green stripe that comes off of the fog lamp relay in the underhood fuse block.

then find a constant power source and run a wire from the constant power to the switch and the other side of the switch run a wire to one of the above mentioned wires to the fog lamps to manually send power
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Old Apr 6, 2010, 05:30 PM
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I want to do Independent fog mod as well, but I want to keep the existing button beside the low beam ..
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Old Apr 7, 2010, 11:12 AM
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Anything with less work? Like here: http://www.focusfanatics.com/howtos/foglight/
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Old Apr 7, 2010, 12:31 PM
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yeah, that can be done if you just want to have the fogs on all the time, or just keep opening the hood to turn them on or off. i'll look up the relay to see which one and which terminals you'd need to jump, give me a bit...

edit: ok, so if you go into the underhood relay box pull the fog lamp relay, which, if youre looking at the box from the front of the car, should be the one nearest to you on the far left side of a row of 3 similar relays. then you will see four terminals set up like:

1 2
3
4

i recommend checking with a dvom, just to make sure, but there should be power at terminal 4, either way, you are going to want to jump terminal 4-3 and it should signal the fogs to always be on as long as there is power at terminal 4, the only concern is that i'm not sure if it's constant power or ignition-on only, so the dvom or test light will help determine that, or just hook it up and see i guess...

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Old Apr 7, 2010, 09:04 PM
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does that mean the switch will not work anymore?
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Old Apr 7, 2010, 10:43 PM
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whats a dvom? and +1 on the switch
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Old Apr 8, 2010, 01:35 AM
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digital volt ohm meter?? imma guessing here
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Old Apr 8, 2010, 01:35 AM
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Originally Posted by initial_d2k View Post
does that mean the switch will not work anymore?
yes that mean it wont work anymore
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Old Apr 8, 2010, 07:00 AM
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evil is right on both counts
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Old Apr 8, 2010, 06:00 PM
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what's the main idea behind getting them to be independent
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Old Apr 8, 2010, 06:37 PM
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yeah .. then this is necessarily like tapping to the ignition or accessory ..
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Old Apr 8, 2010, 06:45 PM
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yup, so you want to essentially run accy power to terminal 3 on the relay if you want to do this mod, not really worth it i dont think, i just dont see the purpose. but if you want to do it, i'm glad to help you figure out how
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Old Apr 8, 2010, 08:13 PM
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cuz right now, to turn on the fog light, i need to turn on my low beam (oem hid).
im trying to find a way that i can turn on (switch on) the fog even if i dun have low beam on ..
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Old Apr 8, 2010, 08:31 PM
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using the original spin-style switch on the turn signal stalk? im 99% positive it's not possible without being able to write code in the etacs ecu, which cant be done by the average joe or even the dealership. the only way i could imagine it would even be possible is if you change turn signal stalks to one without the fog lamp option, then go into etacs and turn fog presence to off and signal the fog circuit to operate as drl, as would be done in a car like the outlander with oem hid's in the fogs. (a lot of guys with outlanders with factory hid like to do the opposite and add fog lamp turn signal switches so they can have both sets of lights on at once) since the drls on the lancer are still in the headlamp assembly, even with the hid system, i doubt this will work, but it would be worth a shot i suppose if you knew someone with a mutIII that could connect with the car. otherwise you're paying probably at least an hour for shop time at a dealership on something that may not even be possible
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