Standing on the right side of the bike, squat down and look into the triangular space created by the back edge of the right side cover, swing arm and bottom of the rear fender.   It's sort of hidden in there.  It's a black switch with a little post extending out with a spring then cable attached.  The locking nuts use a 10mm open end wrench.  

Download and save this owner's manual PDF for future references:
http://home.comcast.net/~kenglong/2002_Suzuki_Savage_LS650P_Owners_Manual.pdf

BTW, did you get the rear turn signal wiring figured out?

So with the adjustment I can get it to turn on and off, but the rear brake pedal isn't effecting it....does that mean something came unhooked in the pedal area? pushing the rear brake pedal isn't moving the wire that is attached to the rear brake light adjutment thing.

The rear brake brake-light switch is triggered by a cable running to the pedal.    And, there is a little spring between the cable and the switch.   Check to make sure everything is connected.


then....  to adjust....

-First get the brake to work at the spot / position where you like it.

-Second, adjust the light switch to come on just after you hit the brakes but before the brakes start to grab.  That way you can give the "too-close-for-comfort" warning by tapping the pedal.

the rear brake light cable has come unconnected from my pedal.  I see the cable (with a small metal endcap) and there is a brass triangular piece on the pedal assembly that looks like the cable is supposed to attach to, but I can't get it to stay.  How does the cable connect to the pedal thing?