Here is Std 7 wire aftermarket signal sw
Enlarge to read, don't know if colors match but hookup is the same. You can figure it out by elimination and testing.
Here is what the diagram says.

GRN: RF
RED: Brake LT SW (as you said)(you probably have the pressure sensing kind)
BRN: Stop/Turn RR
ORN: Stop/Turn LR
BLU: Flasher Vert blade (P)
Other vert blade (X) to 12V
BLK: Flasher Horiz blade (L)
YEL: LF
If using 2 blade flasher, connect both BLU and BLK to "L" blade on flasher.
Park lamps and rear tail lamps not shown.

You say you have two wires on each lamp. One is for the tail lights/running lights/parking lights, one is for the turn/stop. Brightest is turn/stop. The lamp housing is probably ground. Sounds like you have one of the two wires hooked to something. Bottom line: Hook the left bright bulb wire to the turn signal switch proper wire. Hook the right bright bulb wire to other turn signal switch proper wire. Hook the other "less bright" bulb wires together and to the dash headlight switch proper terminal. If you know which bulb is for what, disregard my bright/less bright designation. Post now fully addressed. grin

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn