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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Cosmetic and Lighting Modifications (exterior/interior) > I want fog lights!



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      10-03-2012, 12:20 AM   #1
Killerx
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I want fog lights!

So my car did not come with fog lights. So I purchased fog lights and a new switch that has the fog light button.

I wanted to use the fog button on the switch, but not have anything to do with the ecu (so running wires from the switch to power, to fog lights)

Has anyone done this or have a better way to do it. The way I'm doing this is because I dont think the wires are run through the car for the fogs
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      10-03-2012, 08:27 AM   #2
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Most likely you'll have to connect it to the battery directly. I'm not sure if thats a good idea unless you do it somewhat professionally (so that nothing shorts or what not).

Battery > fuse > lights > switch. Look for the boost gauge diy to find out where to run the wires through (grommet right in back of brake pedal).
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      10-03-2012, 10:02 AM   #3
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Quote:
Originally Posted by thatswhatsh3said View Post
Battery > fuse > lights > switch. Look for the boost gauge diy to find out where to run the wires through (grommet right in back of brake pedal).
I'd really suggest against direct-wiring fog lights through the switch. Best to use a relay; allows you to use a much smaller wire gauge through the firewall since it only needs a fraction of an amp rather than carrying 9+ amps (if I'm right on the fogs being 55W each)
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      10-03-2012, 10:09 AM   #4
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^relay/fuse -- thats what I meant. Most kits come with them.
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      10-03-2012, 11:44 AM   #5
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Most likly the wires are already there. All the wireing harnesses sould be the same, it's cheaper to make that way.
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      10-03-2012, 12:02 PM   #6
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Quote:
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Most likly the wires are already there. All the wireing harnesses sould be the same, it's cheaper to make that way.
+1 My guess too unless we're talking M3's.
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