Driver Door Module (DDM) C1 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12162820 20 Way F Non-Delphi Packard (BLK)
Pin	Wire Color	Circuit No.	Function
1-3	-	-	Not Used
4	BLK/WHT	351	Ground (LH Drive)
4	BLK/WHT	451	Ground (RH Drive)
5	-	-	Not Used
6	TAN/WHT	2076	Power Door Serial Data
7-8	-	-	Not Used
9	GRY	1690	Automatic Day/Night Mirror Signal
10	PNK	1691	Automatic Day/Night Mirror Low Reference
11 - 12	ORN	640	Battery Positive Voltage
13	PPL	1807	Class 2 Serial Data
14	BLK/WHT	351	Ground (LH Drive)
14	BLK/WHT	451	Ground (RH Drive)
15	TAN/WHT	2076	Power Door Serial Data
16	BRN	2064	Battery Positive Voltage
17	PNK	2070	Driver Door Power Window Low Speed Serial Data
18	LT GRN	2072	Driver Door Power Window High Speed Serial Data
19	WHT	2068	Low Reference
20	YEL	1491	Backlight Lamps Control