The flasher does not know left from right but the turn signal lever and wiring do. The flasher just interrupts the signal to the bulbs, the turn signal switch directs the current left or right. I would remove one right side bulb at a time to confirm or not, whether its a short at the socket 1st. If it still blows the fuse, I would inspect the turn signal switch wiring connector under the steering column. If thats OK then look under the rubber boot on the turn lever itself for a wire touching the steering column as the lever is pushed up.

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81 300CD (sold) 1972 280 SEL 4.5 (sold) 1966 250 S 4 spd (sold) 1974 450 SL (sold) 86 BMW 325ES (sold), 1973 280C (sold) 1988 300 SE.