The 6 flashes means it picked up a code.
It usually flashes codes in 4 way mode, since it only flashes to the left, the right rear not coming on is likely the problem.
The outputs for each side are common from the TSSM. Trace the wiring including ground to the right rear turn signal bulb for an open. Might want to check for TS power for that bulb at the connector under the rear seat and take it from there. The circuit out from the TSSM is hot as proven by the right front coming on, it just doesn't have enough load to flash.
It usually flashes codes in 4 way mode, since it only flashes to the left, the right rear not coming on is likely the problem.
The outputs for each side are common from the TSSM. Trace the wiring including ground to the right rear turn signal bulb for an open. Might want to check for TS power for that bulb at the connector under the rear seat and take it from there. The circuit out from the TSSM is hot as proven by the right front coming on, it just doesn't have enough load to flash.