The flasher is shared by both the hazards and the turn signals. The hazard button switch activates it by grounding the blue/green wire and connecting the flasher’s output to the hazard diode which distributes the pulsing power to both sides lights. When you activate the turn signal switch, it grounds a pink wire that activates the cancel unit and it grounds the blue/green wire of the flasher via the turn signal diode. A different part of the turn signal switch also routes the pulsing power from the flasher to the appropriate lights, left or right. So, since your hazards work, your issue is not the flasher board in the gauges. Have you had anything done to the steering stem, forks, or the handlebars? If so, the most likely culprit is the little green connector on the top of the steering stem. It’s the harness plug for the cancel unit and has tiny pins that can get bent or pushed out of the backside of the connector. The harness runs from there over to the white frame under the right side fairing pocket and passes through C17 which is known to get corrosion in it from rain dripping out of the vent above it. When you try the signals, does the side that you are trying to activate turn off the position light in the mirror? If yes, then the cancel unit is working and the issue may be somewhere else in the circuits. If no, then the cancel unit or the circuits from the turn signal switch to it are suspect.
