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Q: tail light wiring is black, brown and yellow. Which is L turn, which is R turn? on 2001 Buick Century

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
2001 Buick Century Custom, 6cyl
(1) Answer
Turn key on and say the RIGHT signal light .. Using a test light or voltmeter - see which wire has power for that light - then do LEFT the same way .. It'd be hard to get that wrong!