Relay Block Connector End View - I/P Bottom View

Fig 1: Relay Block - Body Bottom View

Courtesy of GENERAL MOTORS CORP.

Relay Block - I/P C1 Pin Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12193905 68-Way F Metri-pack 280 Series Flexlock (LT GRY)
Pin	Wire Color	Circuit No.	Function
A1	LT GRN	24	Backup Lamp Supply Voltage - BCM
	LT GRN	24	Backup Lamp Supply Voltage - Junction Block - Rear
A2	-	-	Not Used
A3	BLK/WHT	1704	Low Reference
A4	DK GRN/WHT	636	Ambient Air Temperature Sensor Signal
A5	BLK/WHT	1851	Ground - HVAC Control Module
	BLK/WHT	1851	Ground - Data Link Communications
A6	WHT	193	Rear Defog Relay Control
A7	-	-	Not Used
A8	BRN/WHT	230	Instrument Panel Lamps Dimming Control
A9	BRN	341	Ignition 3 Voltage
A10	DK GRN/WHT	817	Vehicle Speed Signal - Navigational Radio
A11	BRN/WHT	230	Instrument Panel Lamps Dimming Control - HVAC Control Module
	BRN/WHT	230	Instrument Panel Lamps Dimming Control - Headlamp Switch
A12	GRY/BLK	690	Courtesy Lamp Supply Voltage
B1-B2	-	-	Not Used
B3	BLK/WHT	1851	Ground
B4	-	-	Not Used
B5	BLK/WHT	1851	Ground
B6	ORN	1840	Battery Positive Voltage
B7	RED	642	Battery Positive Voltage
B8	BRN/WHT	230	Instrument Panel Lamps Dimming Control
B9	DK GRN/WHT	817	Vehicle Speed Signal
B10	GRY/BLK	690	Courtesy Lamp Supply Voltage - Footwell Courtesy Lamp - Left
	GRY/BLK	690	Courtesy Lamp Supply Voltage - Footwell Courtesy Lamp - Right
B11-B12	-	-	Not Used
C1	-	-	Not Used
C2	BRN/WHT	230	Instrument Panel Lamps Dimming Control - Steering Wheel Controls
	BRN/WHT	230	Instrument Panel Lamps Dimming Control - Traction Control Switch
C3	BRN/WHT	230	Instrument Panel Lamps Dimming Control
C4	ORN	1732	Inadvertent Load Control Courtesy Lamps Supply Voltage - I/P Compartment Lamp
	ORN	1732	Inadvertent Load Control Courtesy Lamps Supply Voltage - Underhood Lamp
C5	BLK/WHT	1851	Ground - Rear Seat Audio
	BLK/WHT	1851	Ground - Headlamp Switch
C8	BRN/WHT	230	Instrument Panel Lamps Dimming Control - Transfer Case Shift Control Switch
	BRN/WHT	230	Instrument Panel Lamps Dimming Control - Ride Height Switch (w/ZM6)
C9	ORN	1340	Battery Positive Voltage
C10	BRN	2409	Interior Park Lamps Supply Voltage
C11-C12	-	-	Not Used
D1	WHT/BLK	5515	Inside Air Temperature Sensor Assembly Control
D2	BRN/WHT	230	Instrument Panel Lamps Dimming Control
D3	BRN/WHT	230	Instrument Panel Lamps Dimming Control
D4	ORN	1732	Inadvertent Load Control Courtesy/Vanity/Reading Lamps Supply Voltage
D5	BLK/WHT	1851	Ground - I/PC
	BLK/WHT	1851	Ground - OnStar Module
D8	BLK/WHT	1851	Ground
D9	BLK	1050	Ground
D10	BRN	2409	Interior Park Lamps Supply Voltage
D11-D12	-	-	Not Used
E1	BRN	718	Low Reference
E2	PNK	1691	Automatic Day/Night Mirror Low Reference
E3	-	-	Not Used
E4	PPL/WHT	1382	LED Dimming Signal - Transfer Case Shift Control Switch
	PPL/WHT	1382	LED Dimming Signal - Ride Height Switch (w/ZM6)
E5	BLK/WHT	1851	Ground - Radio
	BLK/WHT	1851	Ground - Flasher Module
E6	DK GRN/WHT	817	Vehicle Speed Signal
E7	PPL/WHT	1382	LED Dimming Signal
E8	BLK/WHT	1851	Ground - BCM - C2
	BLK/WHT	1851	Ground - BCM - C3
E9	-	-	Not Used
E10	RED	242	Battery Positive Voltage
E11-E12	-	-	Not Used
F1	DK GRN	734	Inside Air Temperature Sensor Signal
F2	GRY	1690	Automatic Day/Night Mirror Signal
F3	PNK	739	Ignition 1 Voltage
F4	-	-	Not Used
F5	BLK/WHT	1851	Ground
F6	PPL/WHT	1382	LED Dimming Signal - Headlamp Switch
	PPL/WHT	1382	LED Dimming Signal - BCM
F7	ORN	4540	Battery Positive Voltage
F8	BLK/WHT	1851	Ground
F9	LT BLU	1620	Trailer CHMSL Supply Voltage
F10	DK BLU	47	Trailer Auxiliary Supply Voltage
F11	YEL	243	Accessory Voltage
F12	-	-	Not Used

Relay Block - I/P C3 Pin Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15328768 12-Way F Metri-pack 280 Series Flexlock (BRN)
Pin	Wire Color	Circuit No.	Function
A	LT GRN	24	Backup Lamp Supply Voltage
B	ORN	4540	Battery Positive Voltage
C	BLK	1050	Ground
D	-	-	Not Used
E	BRN	341	Ignition 3 Voltage
F	-	-	Not Used
G	BLK/WHT	1704	Low Reference
H-J	-	-	Not Used
K	DK GRN/WHT	636	Ambient Air Temperature Sensor Signal
L	GRY/BLK	690	Courtesy Lamp Supply Voltage
M	ORN	1732	Inadvertent Load Control Courtesy/Vanity/Reading Lamps Supply Voltage

Relay Block - I/P C4 Pin Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12193922 6-Way F Metri-pack 280 Series Flexlock (CRM)
Pin	Wire Color	Circuit No.	Function
A	BRN/WHT	230	Instrument Panel Lamps Dimming Control - Sunroof Switch (w/CF5)
	BRN/WHT	230	Instrument Panel Lamps Dimming Control - Garage Door Opener
B	PNK	1691	Automatic Day/Night Mirror Low Reference
C	GRY	1690	Automatic Day/Night Mirror Signal
D	DK GRN	734	Inside Air Temperature Sensor Signal
E	BRN	718	Low Reference
F	WHT/BLK	5515	Inside Air Temperature Sensor Assembly Control

Relay Block - I/P C7 Pin Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12193924 6-Way F Metri-pack 280 Series Flexlock (BRN)
Pin	Wire Color	Circuit No.	Function
A	BRN	2409	Interior Park Lamps Supply Voltage
B	RED	242	Battery Positive Voltage
C	DK BLU	47	Trailer Auxiliary Supply Voltage
D	LT BLU	1620	Trailer CHMSL Supply Voltage
E	-	-	Not Used
F	BLK	1050	Ground

Relay Block - I/P C10 Pin Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15357030 12-Way F Metri-pack 280 Series Flex-Lock (NAT)
Pin	Wire Color	Circuit No.	Function
A	ORN	4540	Battery Positive Voltage - LR Heated Seat Module (w/KA7)
	ORN	4540	Battery Positive Voltage - RR Heated Seat Module (w/KA7)
B	GRY/BLK	690	Courtesy Lamp Supply Voltage - Left B-Pillar
	GRY/BLK	690	Courtesy Lamp Supply Voltage - Right B-Pillar
C	GRY/BLK	690	Courtesy Lamp Supply Voltage - LR Door
	GRY/BLK	690	Courtesy Lamp Supply Voltage - RR Door
D	-	-	Not Used
E	ORN	1440	Battery Positive Voltage
F	BRN/WHT	230	Instrument Panel Lamps Dimming Control - LR Window Switch
	BRN/WHT	230	Instrument Panel Lamps Dimming Control - RR Window Switch
G	-	-	Not Used
H	ORN	1440	Battery Positive Voltage
J	-	-	Not Used
K	ORN	1340	Battery Positive Voltage
L	PPL	293	Rear Defog Element Supply Voltage
M	-	-	Not Used