Older W203 Tail Light Mod ( 4 dollars )
I was tired of the ugly 1 light running light in the back.. So 4 dollars laterrr...
List
Auto zone Bulbs 5007LL 2 pack 3.99 + tax
2 X 3 inch of Electrical wire
4 X End caps
( Please make sure that both bottom bulbs are 5007LL )

WARNING NOTE: You will have to cut your fog light wire.. which means you will no longer have the 1 bright ugly light in the back when you fully pull out the knob.

Driver Side :
Cut the green wire NUMBER 1# ( Cut enough space so you can splice the wire open )
Cut the Grey n black Wire number 5# ( Cut enough space so you can splice the wire open )
Take one 3 inch wire connect 5# to 1# ( Use the end caps here )
Wire 5# is the power cable look in the picture.. You can see 3 wires are connected to wire 5#
The red cable is the new power for the fog light.. Connect this wire to wire 1# end cap it down.
Make sure the other end of wire 1# is tapped up with electrical tape.
The passenger side : is the same setup as the driver side look for the power in connector 5 and the other wire in 1
Its very easy anyone with half a brain can do this.. Took me 10 mins to do everything.~~No errors on the dash~~
Heres the outcome
Then again, I have a newer W203 so this mod isn't for me. My tailights are
Anyways i just wanted to post this for older w203 that don't care about a useless fog light that got me pulled over =(




I was tired of the ugly 1 light running light in the back.. So 4 dollars laterrr...
List
Auto zone Bulbs 5007LL 2 pack 3.99 + tax
2 X 3 inch of Electrical wire
4 X End caps
( Please make sure that both bottom bulbs are 5007LL )

WARNING NOTE: You will have to cut your fog light wire.. which means you will no longer have the 1 bright ugly light in the back when you fully pull out the knob.

Driver Side :
Cut the green wire NUMBER 1# ( Cut enough space so you can splice the wire open )
Cut the Grey n black Wire number 5# ( Cut enough space so you can splice the wire open )
Take one 3 inch wire connect 5# to 1# ( Use the end caps here )
Wire 5# is the power cable look in the picture.. You can see 3 wires are connected to wire 5#
The red cable is the new power for the fog light.. Connect this wire to wire 1# end cap it down.
Make sure the other end of wire 1# is tapped up with electrical tape.
The passenger side : is the same setup as the driver side look for the power in connector 5 and the other wire in 1
Its very easy anyone with half a brain can do this.. Took me 10 mins to do everything.~~No errors on the dash~~
Heres the outcome

Awesome mod!
Except Im a bit confused..so this mod basically switches on the rear fog light on both sides whenever the tail lamp is on..hence making it brighter?
It looks a lot brighter in the picture then in real life.. ill try to snap another one tonight
I found out that the older tail lights are frosted as well.. Not clear like the new ones
Last edited by krisv420; Oct 16, 2009 at 01:44 PM.
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easier way to do this is to just splice a wire into the foglight connector and run a dual filament bulb in it's place. instead of leaving the fog light non-functioning.
AND you could've just showed the cop how the head light switch works.
easier way to do this is to just splice a wire into the foglight connector and run a dual filament bulb in it's place. instead of leaving the fog light non-functioning.
AND you could've just showed the cop how the head light switch works.
Also, Q on the '05+ conversion - is that a straight swap, or are wiring mods required?
Facelift rears are striaght swap, no mods, nada.
I find it useful but only when necessary, otherwise driving around with it on just looks stupid. It's great if a friend is trying to follow you at night because it easily differentiates your car from the others on the highway.
I don't really understand the benefit of this mod, maybe if you can get better photos with them on vs off I'll get a better idea? Does it actually look better with them on or just brighter?
If the cop gave me a ticket for that I would have taken it to court and made a fool of him. Unless there's an American law against using rear fogs unnecessarily? I believe in Germany using front or rear fogs is illegal unless weather permits them. This is probably why you can't have the fog lights on in auto mode.
Last edited by acr2001; Oct 17, 2009 at 10:45 PM.
Ill take a picture after my HID install today i have to remove the whole front bumper for this install =P
now it just looks like you're always breaking when your fogs are on...
Its either 21 or 23 to lazy to look
easier way to do this is to just splice a wire into the foglight connector and run a dual filament bulb in it's place. instead of leaving the fog light non-functioning.
AND you could've just showed the cop how the head light switch works.
Can some one explain how to do this (splice the wire and use a dual filament bulb). I would like to both of the rear fog lights connect. I never use the single because it looks so silly. I was thinking I would hook up the passenger side and use them only in extreme weather.
If there is an easier way please let me know.
Last edited by oottaammaa; Mar 1, 2013 at 07:33 AM.
Why go through the work and hassle when you just don't have to use the feature?
Personally I like having it.




