Automatic Transmission Inline 20-Way Connector End View

WARNING: This page is about a different car, the 2004 Pontiac Grand Am and 2004 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.

AT Inline Harness Connector End View, Engine Side

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12160493 20-Way F Micro-Pack 100 Series (GRY)
Pin	Wire Color	Circuit No.	Function
A	LT GRN	1222	1-2 Shift Solenoid Valve Control
B	YEL/BLK	1223	2-3 Shift Solenoid Valve Control
C	RED/BLK	1228	Pressure Control (PC) Solenoid Valve High Control
D	LT BLU /WHT	1229	PC Solenoid Valve Low Control
E	PNK	1039	Ignition 1 Voltage
F-K	-	-	Not Used
L	YEL/BLK	1227	Transmission Fluid Temperature (TFT) Sensor Signal
M	WHT/BLK	2762	Low Reference
N	-	-	Not Used
P	RED	1226	TFP Switch Signal C
R	DK BLU	1225	TFP Switch Signal B
S	RED/BLK	1230	Input Speed Sensor (ISS) High Signal
T	BRN	418	Torque Convertor Clutch Pulse Width Modulated (TCC PWM) Solenoid Valve Control
U	YEL	657	TCC Release Switch Signal
V	DK BLU /WHT	1231	ISS Low Signal
W	-	-	Not Used

AT Inline Harness Connector End View, Transmission Side

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12160782 20-Way M Micro-Pack 100 Series (GRY)
Pin	Wire Color	Circuit No.	Function
A	LT GRN	1222	1-2 Shift Solenoid Valve Control
B	YEL	1223	2-3 Shift Solenoid Valve Control
C	PPL	1228	Pressure Control (PC) Solenoid Valve High Control
D	LT BLU	1229	PC Solenoid Valve Low Control
E	RED	839	Ignition 1 Voltage
F-K	-	-	Not Used
L	BRN	1227	Transmission Fluid Temperature (TFT) Sensor Signal
M	GRY	452	Low Reference
N	-	-	Not Used
P	ORN	1226	TFP Switch Signal C
R	DK BLU	1225	TFP Switch Signal B
S	BLK	1230	Input Speed Sensor (ISS) High Signal
T	TAN	418	Torque Convertor Clutch Pulse Width Modulated (TCC PWM) Solenoid Valve Control
U	WHT	1804	TCC Release Switch Signal
V	DK GRN	1231	ISS Low Signal
W	-	-	Not Used