For an early SB, pull the turn signal handle towards you. Pull again to turn off. If this doesn't work you either have a bad relay, or the wiring needs troubleshooting.
To turn brights on in a 1974...
First you take off the window crank. Then you remove the door handle, you have to pop off the dish from the front with a small screwdriver. There will be a Phillips head screw in there, remove that....
First, Open the trunk and locate the general area where the taillight is located and wired, IE Right or left. Then look on the inside wall of the trunk, there should be a small area that can be...