The tan and light green are the front left and right turn lamps circuit. They are branching off for the indicators I would guess.
Isn't your hazard switch part of the turn sig. switch? If it is dash mounted yeh, I can see what they did. See the hazard switch, visualize a separate switch such as on 67-69. What they are doing is that when the switch is active, the hazard flasher output, the brake light switch line, and the left and right front are all tied together. With the TS switch centered, the two rear turn lamps are already tied to the brake light switch. So the hazard flasher power now goes to all 4 lamps
