| In the
diagram above, the upper portion shows the factory setup
of how the fog lamps operate. The fog lamps will only
energize when the headlamp switch is full on and only the
dim headlights are on. When you go to bright mode or turn
off the headlights, current is stopped from reaching the
foglight switch. The
lower portion of the diagram shows the fog lamp wiring
modified to use a Bosch type relay to actually turn on
the lamps while the factory feed from the fog lamp switch
just turns on the relay. The fog lamps now no longer draw
current through the headlamp and multifunction switches
which are prone to overheating and ultimately failing.
The factory feed only serves to energize the relay which
actually feeds the fog lamps now through a separate
internal circuit from a 12v source you have chosen. It's
always a good idea to have an inline fuse link somewhere
between the 12v source and the relay. This also allows
you to add brighter fog lamps if you wish and the factory
wiring will not be overloaded from the higher wattages.
You only have to worry about the power source, relay, and
inline fuse setup you use. Be sure and review the
instructions with the relay for proper installation.
I have researched various
different ways the supercoupe fog lamps have been
modified and the method presented here is in keeping with
the manner in which the fog lamp circuit was originally
designed but with added load protection for the rest of
the system. You can of course modify this arrangement as
you like. Many owners have modified the fog lamps to come
on totally separately from the system at will. The only
problem you may find with that is how that may conflict
with the local lighting laws of your area. I hope this
information is helpful.
L.M.
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