This article is from the Toyota Tundra FAQ, by Steve Yee with numerous contributions by others.
If you have a Tundra with an automatic or manual transmission, there will be a
set of black buttons to the left of the steering wheel column. These buttons
are for the placement of either a fog lamp button (leftmost button nearest the
door) or for a clutch disengagement switch (rightmost button nearest the
steering wheel column). If you have a manual transmission with fog lamp
option, you will have both switches. If you have an automatic transmission
with fog lamps, you will only have one button. If you have an automatic
transmission with no fog lamps, you will have no buttons.
Some Tundra owners have figured out a way to put these blank buttons to good
use. An Arizona Neurosurgeon that owns a Tundra has figured a way to wire a
harness into the hole position. A detailed set of instructions can be found
at: http://www.fastq.com/~louvu/extrafogswitch.htm .
 
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