All signals herein required given by hand and arm shall be given from the left side of the vehicle in the following manner, and such signals shall indicate as follows: (1) Left turn, hand and arm extended horizontally; (2) Right turn, hand and arm extended upward; and (3) Stop or decrease speed, hand and arm extended downward.
Method of giving hand and arm signals
S.C. Code Ann. § 56-5-2170, under Title 56, Chapter 5.
S.C. Code Ann. § 56-5-2170