Turn Signal/Multifunction Switch - C2 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12052856 4-Way F Metri-Pack 280 Series (BLK)
Pin	Wire Color	Circuit No.	Function
A	BLK	28	Horn Relay Control
B	DK BLU	15	Right Turn Signal Lamps Supply Voltage
C	LT BLU/BLK	14	Left Turn Signal Lamps Supply Voltage
D	PPL	16	Turn Signal Flasher Signal