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Wiring The Rear Fog Lights As Extra Brake Lights
This procedure take about 10 minutes and works on MKIV Golf's and Jetta's and B5 Passat's. It is completely reversible and makes no permanent modifications to any parts. This is the 'easy' way that I learned after doing it the 'hard' way myself. The 'hard' way involves buying a special wire from a VW dealer and splicing it into the brake light wire...blah blah blah. If you are going to do it, do it this way.
Tools & Parts Needed:
Wire Stripper/Crimp
Tool
Electrical Tape
P21W Bulbs (2) - $2.49/2 Pack
14 Gauge Wire
(Approx. 16") - $1.99/20 Foot Roll
Small Female Crimp Connectors, 4.8mm/.187"
Tab (4) - $1.99/22 Pack
The bulbs needed
The small female
connectors, 14 gauge wire and crimp tool
Cut 2 - 8" lengths of wire and
crimp a small female connector on each end
Wrap a small piece of
electrical tape around each connector so it does not make contact with any other
metal part
Get in the trunk and
open the doors behind the tail lights (can be done by using your fingers or a
flat head screw driver)
Unplug the wiring
harness (1) then push the 2 tabs together (2) and pull out the bulb holder - do
both sides (you may have to wiggle it and pull the trunk lining a little to get
it to come out, it is an odd fit)
You will note that
there is an empty socket on the side where the new bulb will go (driver side
shown)
Install the bulb
into the empty socket on both bulb holders then flip the bulb holders over
(driver side shown)
At the top you will
see 'BR' (brake) next to the top most connector (2) and 'RF' (rear fog) on one
of the bottom connectors (1) (driver side shown)
These 2 male
connectors are where you plug the small female connectors of your wires into on
both bulb holders. (driver side shown)
Reverse all of your steps
to re-install and this is the finished result.