There's a nut that holds the switch on. To replace the switch, remove that
nut, pull the switch out, and unplug it. Make not of the position of the
other nut on the switch. It's used to adjust the switch so that the brake
lamps come on as the pedal is depressed. The new switch will come with
one. Move it near the same position to minimize the amount of adjusting
you'll need to do. Put the switch in and tighten the attaching nut. Plug
it in and check to see how far you need to depress the brake pedal for the
lamps to come on. If unacceptable, loosen the nuts and adjust the
switch's position. This may require unplugging the switch so you can spin
it around.
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