Steering Wheel Controls - Left Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		50-57-9404 4-Way F Molex (BK)
Pin	Wire Color	Circuit No.	Function
1	D-BU	1796	Steering Wheel Controls Signal
2	BK	1450	Ground
3	GY/BK	1458	Instrument Panel Lamp Supply Voltage
4	YE	1996	Remote Radio Control Supply Voltage