Electrical Center Identification Views. GMC Truck TopKick C-Series (Conventional) C4/C5 2008

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2008 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 Electrical Center Identification Views

Connector 1:	Fuse Block - Underhood Primary - Label
Connector 2:	Fuse Block - Underhood Primary - Top View
Connector 3:	Fuse Block - Underhood Primary - Bottom View
Connector 4:	Fuse Block - Underhood Primary - Wire Entry
Connector 5:	Fuse Block - Underhood Primary X1 (Engine Chassis)
Connector 6:	Fuse Block - Underhood Primary X1 (Engine Chassis) (L18)
Connector 7:	Fuse Block - Underhood Primary X1 (Engine Chassis) (LMM)
Connector 8:	Fuse Block - Underhood Primary X1 (Engine Chassis) (LF6/LF8)
Connector 9:	Fuse Block - Underhood Secondary - Label
Connector 10:	Fuse Block - Underhood Secondary - Top View
Connector 11:	Fuse Block - Underhood Secondary - Bottom View
Connector 12:	Fuse Block - Underhood Secondary - Wire Entry
Connector 13:	Fuse Block - Underhood Secondary X1
Connector 14:	Fuse Block - I/P 1 - Label
Connector 15:	Fuse Block - I/P 1 - Front View
Connector 16:	Fuse Block - I/P 1 - Back View
Connector 17:	Fuse Block - I/P 1 - Wire Entry
Connector 18:	Fuse Block - I/P 2 - Label
Connector 19:	Fuse Block - I/P 2 - Front View
Connector 20:	Fuse Block - I/P 2 - Back View
Connector 21:	Fuse Block - I/P 2 - Wire Entry

Fuse Block - Underhood Primary - Label

Fuse Block - Underhood Primary - Label Usage

Device	Rating	Description
A/C COMP Fuse	10A	A/C Compressor
ABS-1 Fuse	40A	Electronic Brake Control Module (EBCM) (JE3), ABS Relay (JE4)
ABS-2 Fuse	40A	Electronic Brake Control Module (EBCM) (JE3)
ABS-3 Fuse	40A	Electronic Brake Control Module (EBCM) (JE3)
E/A PUMP Fuse	40A	Air Compressor (K16)
ECM Relay (LF8)	--	Engine Control Module (ECM)
ECM-B Fuse ) (LF6)	25A	Engine Control Module (ECM
ECM-C Fuse (LF6)	25A	Engine Control Module (ECM)
ENG-1 Fuse	10A	EVAP Canister Purge Solenoid Valve, Glow Plug Control Module (GPCM), HTD FUEL Relay, Mass Air Flow (MAF) Sensor, Overdrive Defeat Switch (LCT), PTO Switch (PTO), PTO Upfitter Connector, Rear Axle Shift Motor - Two Speed (HPZ)
ENG-2 Fuse	15A (L18)	Fuel Injectors/Ignition Coils
ENG-2 Fuse	30A (LMM)	Engine Control Module (ECM)
ENG-3 Fuse (-LMM)	15A	Fuel Injectors/Ignition Coils (L18), PTO Relay (PTO) (LF6/LF8), Reverse Relay (MD) (LF6/LF8)
ENG-4 Fuse (- LF6)	10A	Cruise Control Switch (K34)
ENGINE Fuse	50A	Ignition - A Relay, Ignition - B Relay
EV-FAN Fuse (LMM)	5A	Cooling Fan Relay
EV-FAN Relay (LMM)	--	Cooling Fan
FUEL Fuse (L18/LMM)	20A	Fuel Relay
FUEL Relay (L18/LMM)	--	Fuel Pump
HORN Fuse	20A	Horn Relay
HORN Relay	--	Horn
HTD FUEL Fuse (LMM)	20A	Heated Fuel Relay
HTD FUEL Relay (LMM)	--	Fuel Heater
IGN - A Relay	--	Ignition
IGN - B Relay	--	Ignition
O2S Fuse (L18)	15A	Heated Oxygen Sensor (HO2S)
PCM-B Fuse	10A (L18, LF6, LMM)	Serial Data Gateway (SDG) (-LMM), Powertrain Control Module (PCM) (L18), Engine Control Module (ECM) (LMM), Transmission Control Module (TCM), Electric Shift Selector (LF6),
PCM-B Fuse	15A (LF8)	Data Recorded Module (DRM), Driver Information Center (DIC), Engine Control Module (ECM), ECM Relay , Serial Data Gateway (SDG)
PTO Relay (-LF8)	--	Power Take-Off (PTO)
REVERSE Relay	--	Backup Alarm (UZF), Backup Lamps
RR DEFOG Fuse	30A	HVAC Control Assembly Connector (C49)
SPARE Fuse	10A	Not Used
SPARE Fuse	15A	Not Used
SPARE Fuse	20A	Not Used
SPARE Fuse	30A	Not Used
STARTER Relay	--	Starter Solenoid
STUD A Fuse	30A	AUX BODY B+ Upfitter Provision A
STUD B Fuse	30A	AUX BODY B+ Upfitter Provision B
TCM Fuse (LF8)	15A	Transmission Control Module (TCM), Electric Shift Selector

Fuse Block - Underhood Primary - Top View

Fuse Block - Underhood Primary - Bottom View

Fuse Block - Underhood Primary - Wire Entry

Connector Part Information

OEM: 12146281
Description: 86-Way Electrical Center (BK)

Terminal Part Information

Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit

Fuse Block - Underhood Primary - Wire Entry

Pin	Wire	Circuit	Function
A1	0.8 D-GN/WH	465	Fuel Pump Relay Control - Primary (L18/LMM)
A3	2.0 OG	1640	Battery Positive Voltage (L18/LMM)
A4	5.0 RD	1042	Battery Positive Voltage (LMM)
A4	0.8 PK	439	Ignition 1 Voltage (- LMM)
A6	5.0 RD	1042	Battery Positive Voltage
A7	0.8 PU	806	Crank Voltage
A9	5.0 RD	242	Battery Positive Voltage
B1	2.0 GY	120	Fuel Pump Supply Voltage (L18/LMM)
B2	--	--	Not Used
B3	0.8 BK	250	Ground (L18/LMM)
B4	5.0 PU	2000	Ignition 1 Relay Output
B5	--	--	Not Used
B6	0.8 GY	2219	FICM Relay Control (LMM)
B6	0.8 BK	250	Ground (- LMM)
B7	3.0 PU	6	Starter Solenoid Crank Voltage (L18)
B7	5.0 PU	6	Starter Solenoid Crank Voltage (- L18)
B8	--	--	Not Used
B9	0.8 YE	447	Starter Relay Coil Control
C1	1.0 OG	740	Battery Positive Voltage
C3	1.0 OG	740	Battery Positive Voltage
C4	0.8 PK	439	Ignition 1 Voltage
C6	5.0 RD	1042	Battery Positive Voltage
D1	1.0 D-GN	29	Horn Control
D2	--	--	Not Used
D3	0.8 BK	28	Horn Relay Control
D4	5.0 PU	2000	Ignition 1 Relay Output
D5	--	--	Not Used
D6	0.8 BK	250	Ground
D7	0.8 L-GN	488	PTO On Switch - Signal (L18/LMM)
	0.8 PK	539	Ignition 1 Voltage (LF6)
	3.0 OG	440	Battery Positive Voltage (LF8)
D9	0.8 PK	239	Ignition 1 Voltage (L18/LMM)
	0.8 WH	2561	PTO Supply Voltage (LF6)
	3.0 OG	440	Battery Positive Voltage (LF8)
E7	0.8 WH	2561	PTO Supply Voltage (L18/LMM)
	0.8 D-GN/WH	2665	PTO Supply Voltage (LF6)
	1.0 BK/WH	1120	Ignition 1 Voltage (LF8)
E8	--	--	Not Used
E9	0.5 PU	2562	PTO Control (L18/LMM)
	0.8 L-GN	488	PTO On Switch - Signal (LF6)
	1.0 L-BU	1121	Battery Relay Output-Coil (LF8)
F1	5.0 RD	1	Battery Positive Voltage
F3	--	2000	Ignition Voltage Bus (w/o LF6)
F3	5.0 PU	2000	Ignition Voltage (LF6)
F5	--	2000	Ignition Voltage Bus
F7	--	1	Battery Positive Voltage Bus
F9	0.8 L-GN	24	Backup Lamp Supply Voltage (A/T)
F9	0.8 L-GN	24	Backup Lamp Supply Voltage (LF8 +MD)
F11	0.8 GY	1524	Backup Lamp Supply Voltage (A/T)
G2	2.0 PU	1093	Rear Defog Element Supply Voltage
G4	0.8 PK	239	Ignition 1 Voltage
G6	0.8 PK	539	Ignition 1 Voltage (LF6)
	1.0 PK	539	Ignition 1 Voltage (LF8)
	1.0 PK	539	Ignition 1 Voltage (LF8 +MD)
	0.8 PK	539	Ignition 1 Voltage (L18)
	0.8 PK	539	Ignition 1 Voltage (L18)
G8	0.8 OG	440	Battery Positive Voltage (L18)
	0.8 OG	440	Battery Positive Voltage (LF6 w/MT)
	1.0 OG	440	Battery Positive Voltage (LMM)
	1.0 OG	440	Battery Positive Voltage (LF6 w/AT)
	3.0 OG	440	Battery Positive Voltage (LF8)
G10	--	--	Not Used
G12	--	--	Not Used
H1	--	1	Battery Positive Voltage Bus (LF8)
H3	5.0 PU	2000	Ignition Voltage (w/o LF6)
H5	5.0 PU	2000	Ignition Voltage
H7	5.0 RD	1	Battery Positive Voltage
H9	0.8 PK	539	Ignition 1 Voltage (MD -LF8)
	1.0 PK	539	Ignition 1 Voltage (MD +LF8)
	0.8 PK	139	Ignition 1 Voltage (LCT)
H11	0.8 PK	139	Ignition 1 Voltage (MD)
J2	3.0 OG	440	Battery Positive Voltage (LF8)
J4	0.8 PK	639	Ignition 1 Voltage (-LF6)
J6	3.0 PK	339	Ignition 1 Voltage (LMM)
	0.8 PK	339	Ignition 1 Voltage (L18)
	0.8 PK	339	Ignition 1 Voltage (L18)
J8	1.0 OG	1440	Battery Positive Voltage (LMM)
J10	--	--	Not Used
J12	0.8 OG	440	Ignition Voltage (LMM)
K1	--	--	Not Used
K3	--	--	Not Used
K5	--	2000	Ignition Voltage Bus (L18/LMM)
K7	--	1	Battery Positive Voltage Bus
K9	0.8 BK	250	Ground (LMM)
K11	0.8 WH	2368	Cooling Fan Clutch Supply Voltage (LMM)
L2	--	--	Not Used
L4	--	--	Not Used
L6	0.8 OG	440	Battery Positive Voltage (LMM)
	0.8 PK	739	Ignition 1 Voltage (L18)
	0.8 PK	739	Ignition 1 Voltage (L18)
L8	0.8 OG	1240	Battery Positive Voltage
L10	--	--	Not Used
L12	0.8 WH/BK	2366	Cooling Fan Clutch Control (LMM)
M1	3.0 RD	442	Battery Positive Voltage
M2	3.0 RD	1642	Battery Positive Voltage
M2	3.0 RD	1642	Battery Positive Voltage (C6/C7/C8 w/L18 )
M3	3.0 RD	42	Battery Positive Voltage
M4	5.0 RD	1042	Battery Positive Voltage
M4	5.0 RD	1042	Battery Positive Voltage (L18/LF8)
M5	3.0 OG	1840	Battery Positive Voltage
M6	1.0 OG	740	Battery Positive Voltage
M6	1.0 OG	740	Battery Positive Voltage
M7	2.0 OG	1640	Battery Positive Voltage (L18/LMM)
M7	2.0 OG	1540	Battery Positive Voltage (LF6)
M8	2.0 OG	1540	Battery Positive Voltage (LF6)
N1-N8	--	1	Battery Positive Voltage Bus
P7	--	1	Battery Positive Voltage Bus
P8	--	1	Battery Positive Voltage Bus
R7	--	--	Battery Positive Voltage (AUX BODY B+ Upfitter Provision Stud A)
R8	--	--	Battery Positive Voltage (AUX BODY B+ Upfitter Provision Stud B)

Fuse Block - Underhood Primary X1 (Engine Chassis)

Terminal Part Information

Harness: Engine Chassis
Terminal: 12146425
Core/Insulation Crimp: N/A
Description: Ring Terminal

Fuse Block - Underhood Primary X1 (Engine Chassis)

Pin	Wire	Circuit	Function
+	32.0 RD	1	Battery Positive Voltage

Fuse Block - Underhood Primary X1 (Engine Chassis) (L18)

Terminal Part Information

Harness: Engine Chassis
Terminal: 12103513
Core/Insulation Crimp: N/A
Description: Ring Terminal

Fuse Block - Underhood Primary X1 (Engine Chassis) (L18)

Pin	Wire	Circuit	Function
+	2.0 GY	2	Battery Positive Voltage

Fuse Block - Underhood Primary X1 (Engine Chassis) (LMM)

Terminal Part Information

Harness: Engine Chassis
Terminal: 12015107
Core/Insulation Crimp: N/A
Description: Ring Terminal

Fuse Block - Underhood Primary X1 (Engine Chassis) (LMM)

Pin	Wire	Circuit	Function
+	2.0 GY	2	Battery Positive Voltage
+	0.5 GY	2	Battery Positive Voltage

Fuse Block - Underhood Primary X1 (Engine Chassis) (LF6/LF8)

Terminal Part Information

Harness: Engine Chassis
Terminal: 12103965
Core/Insulation Crimp: N/A
Description: Ring Terminal

Fuse Block - Underhood Primary X1 (Engine Chassis) (LF6/LF8)

Pin	Wire	Circuit	Function
+	2.0 GY/WH	2	Battery Positive Voltage (LF6/LF8)
	5.0 RU/BK	2	Battery Positive Voltage (LF6)
	2.0 GY/WH	2	Battery Positive Voltage (LF8)

Fuse Block - Underhood Secondary - Label

Fuse Block - Underhood Secondary - Label Usage

No.	Device	Rating	Description
1	IGN 1 Fuse	40A	Ignition Switch, Starter Relay, Transfer Case Shift Control Module (NP1)
2	IGN 2 Fuse	50A	Ignition 4 Relay
3	IGN 3 Fuse	60A	Ignition Switch
4	BAT/HAZ Fuse	60A	Fuse Block - I/P
5	HDLP Fuse	40A	Headlamp Switch, Fuse Block - I/P
6	LIGHTING Fuse	40A	Courtesy Fuse, Park Fuse
7	HVAC Fuse	50A	Blower Motor Resistor Assembly (C40/C60)
8	ELEC BRK/BRKLP Circuit Breaker	30A	Brake Lamps (C6/C7/C8)
8	ELEC BRK/BRKLP Circuit Breaker	30A	Electronic Brake Control Module (EBCM) (C4/C5)

Fuse Block - Underhood Secondary - Top View

Fuse Block - Underhood Secondary - Bottom View

Fuse Block - Underhood Secondary - Wire Entry

Connector Part Information

OEM: 12092231
Description: 16-Way Fuse Block Component (BK)

Terminal Part Information

Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit

Fuse Block - Underhood Secondary - Wire Entry

Pin	Wire	Circuit	Function
A1	5.0 RD	242	Battery Positive Voltage
A2	5.0 RD	1242	Battery Positive Voltage
A3	5.0 RD	342	Battery Positive Voltage
A4	5.0 RD	142	Battery Positive Voltage
A5	3.0 RD	1142	Battery Positive Voltage
A6	3.0 RD	1342	Battery Positive Voltage
A7	5.0 RD	542	Battery Positive Voltage
A8	3.0 RD	642	Battery Positive Voltage (C4/C5)
A8	3.0 RD	1542	Battery Positive Voltage (RQ2 and U86/RQ3)
B1-B8	--	1	Battery Positive Voltage Bus

Fuse Block - Underhood Secondary X1

Terminal Part Information

Terminal: 12146366
Core/Insulation Crimp: N/A
Description: Ring Terminal

Fuse Block - Underhood Secondary X1

Pin	Wire	Circuit	Function
+	19 RD	1	Battery Positive Voltage

Fuse Block - I/P 1 - Label

Fuse Block - I/P 1 - Label Usage

Fuse No.	Device	Rating	Description
1	STOP Fuse/Circuit Breaker	20A	Stop Lamp Switch, Trailer Stop Lamp Switch
2	--	--	Not Used
3	PRK LAMPS Fuse/Circuit Breaker	20A	Headlamp Switch, Transfer Case Shift Control Switch (NP1)
4	PCM-1 Fuse/Circuit Breaker	15A	Electronic Brake Control Module (EBCM) (JE3), Ignition-A Relay, Ignition-B Relay (-LMM), Powertrain Control Module (PCM) (L18), Engine Control Module (ECM) (LF6/LF8/LMM), Throttle Actuator Control (TAC) Module (L18), Glow Plug Control Module (GPCM)
5	AUX WIRE Fuse/Circuit Breaker	15A	Battery Isolator (L18/LMM), HTD MIR Relay, Outside Rearview Mirror Switch (DB6/DB8), Daytime Running Lights (DRL) Module, Upfitter Lighting Connector
6	HTR/AC Fuse/Circuit Breaker	20A	Air Temperature Actuator (C40/C60), Vacuum Pump (-L18), HVAC Control Assembly (C40/C60), Blower Motor Relay - Auxiliary (C36)
7	HAZRD Fuse/Circuit Breaker	25A	Turn Signal/Multifunction Switch
8	PWR POST Fuse/Circuit Breaker	20A	Cigar Lighter (DT4), Controller Area Network (CAN) Connector, Auxiliary Power Outlet 1, Auxiliary Power Outlet 2, Data Link Connector (DLC)
9	CTSY LAMPS Fuse/Circuit Breaker	10A	Dome Lamps, Dome/Reading Lamps
10	GAUGES Fuse/Circuit Breaker	10A	Automatic Transmission Fluid Temperature (TFT) Gauge, Remote Control Door Lock Receiver (RCDLR) (AU0), Headlamp Switch, Daytime Running Lights (DRL) Relay, Driver Information Center (DIC), Instrument Panel Cluster (IPC)
11	STRTR Fuse/Circuit Breaker	10A	Starter Relay, Clutch Start Switch (M/T), Electronic Brake Control Module (EBCM) (JE3), Engine Control Module (LF8/LMM), Powertrain Control Module (L18)
12	AXLE/4WD Fuse/Circuit Breaker	20A	Rear Axle Shift Relay - Two Speed (HPZ)
13	TRLR Fuse/Circuit Breaker	20A	LT TRN TRLR Relay, RT TRN TRLR Relay
14	RDO/CHIME Fuse/Circuit Breaker	15A	Radio, Chime Module (UL5/UXZ), Instrument Panel Cluster (IPC)
15	DRL Fuse/Circuit Breaker	15A	Daytime Running Lights (DRL) Diode
16	AIRBAG Fuse/Circuit Breaker	10A	Inflatable Restraint I/P Module Disable Switch (AK5), Inflatable Restraint Sensing and Diagnostic Module (SDM) (AJ3/AK5), Inflatable Restraint Resistor Module (AJ3)
17	ILLUM Fuse/Circuit Breaker	10A	Automatic Transmission Shift Selector, Automatic Transmission Fluid Temperature (TFT) Gauge, Inflatable Restain I/P Module Disable Switch (AK5-AQ4), Instrument Power Cluster (IPC), Radio, HVAC Control Assembly, Air Brake Pressure Gage Lamp (JE4),
18	BRK Fuse/Circuit Breaker	10A	A/C Compressor Clutch Relay (C60), High Idle Switch (UF3), Clutch Pedal Position (CPP) Switch (M/T), ABS Relay (JE4), Electronic Brake Control Module (EBCM) (JE4), Stop Lamp Switch
19	PWR/ACCY Fuse/Circuit Breaker	20A	Blower Motor Relay - Auxiliary (C36), Door Lock Relay, Door Lock Switch - Driver (AU3), Door Lock Switch - Passenger (AU3), Outside Rearview Mirror Switch - Driver (DB6/DB8), Remote Control Door Lock Receiver (RCDLR) (AU3/AU0)
20	IGN-4 Fuse/Circuit Breaker	20A	IGN-4 Relay, Instrument Panel Cluster (IPC), Windshield Wiper Motor , Turn Signal/Multifunction Switch, IGN-4 Relay
21	MKR LTS Fuse/Circuit Breaker	20A	MKR LTS Relay
22	TRN/BCK/UP Fuse/Circuit Breaker	15A	Reverse Relay (A/T), Backup Lamp Switch (M/T), Turn Signal/Multifunction Switch
23	TRANS Fuse/Circuit Breaker	10A	Automatic Transmission Shift Selector (MD), Controller Area Network (CAN) Connector, Glow Plug Control Module (GPCM), Instrument Panel Cluster (IPC), Serial Data Gateway (SDG) Module, TCM , ECM, PCM
24	HYD/AIR BRK Fuse/Circuit Breaker	10A	Low Air Pressure Switch, Air Brake Dryer (JE4/JTU), Traction Control Switch (NW9), Air Suspension Dump Switch (G40/G45/GSJ), Regeneration Switch (-L18)
A-B	--	--	Not Used

Fuse Block - I/P 1 - Front View

Fuse Block - I/P 1 - Back View

Fuse Block - I/P 1 - Wire Entry

Connector Part Information

OEM: 12110746
Description: 48-Way Metri-Pack 280 Series (BK)

Terminal Part Information

Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit

Fuse Block - I/P 1 - Wire Entry

Pin	Wire	Circuit	F unction
A2	--	--	Not Used
A3	--	--	Not Used
A6	--	--	Not Used
A7	--	--	Not Used
B2	--	142	Battery Positive Voltage Bus
B4	5.0 RD	142	Battery Positive Voltage
B6	--	142	Battery Positive Voltage Bus
B8	--	142	Battery Positive Voltage Bus
C1	1.0 OG	540	Battery Positive Voltage
C3	1.0 OG	640	Battery Positive Voltage
C5	2.0 OG	1040	Battery Positive Voltage
C7	1.0 OG	140	Battery Positive Voltage
D2	5.0 BN	4	Accessory Voltage
D4	--	142	Battery Positive Voltage Bus
D6	5.0 RD	142	Battery Positive Voltage
D8	--	142	Battery Positive Voltage Bus
E1	1.0 YE	43	Accessory Voltage
E3	0.8 OG	1140	Battery Positive Voltage
E5	1.0 OG	840	Battery Positive Voltage
E7	--	--	Not Used
F2	--	1142	Battery Positive Voltage Bus
F4	3.0 RD	1142	Battery Positive Voltage
F6	--	1342	Battery Positive Voltage Bus
F8	3.0 RD	1342	Battery Positive Voltage
G1	1.0 OG	1340	Battery Positive Voltage
G3	1.0 OG	340	Battery Positive Voltage
G5	0.5 OG	40	Battery Positive Voltage
G7	1.0 OG	240	Battery Positive Voltage
G7	0.8 BN	241	Ignition 3 Voltage (NP1)
H2	--	3	Ignition 1 Voltage Bus
H4	5.0 PK	3	Ignition 1 Voltage
H6	--	3	Ignition 1 Voltage Bus
H8	--	3	Ignition 1 Voltage Bus
J1	0.8 PK	139	Ignition 1 Voltage
J3	0.5 YE	1139	Ignition 1 Voltage
J5	0.5 PK	39	Ignition 1 Voltage
J7	0.8 PK	439	Ignition 1 Voltage
K2	5.0 WH	1390	Off Run Crank Voltage
K4	0.8 D-GN	44	Instrument Panel Lamps Dimmer Switch Signal
K6	5.0 YE	5	Crank Voltage
K8	5.0 OG	300	Ignition 3 Voltage
L1	0.5 PK	1020	Off Run Crank Voltage
L3	0.5 GY	8	Instrument Panel Lamp Supply Voltage 1
L5	0.5 PU	806	Crank Voltage
L7	0.8 BN	641	Ignition 3 Voltage
M2	--	300	Ignition 3 Voltage Bus
M4	5.0 OG	300	Ignition 3 Voltage
M6	--	300	Ignition 3 Voltage Bus
M8	--	300	Ignition 3 Voltage Bus
N1	0.5 BN	541	Ignition 3 Voltage
N3	0.5 BN	441	Ignition 3 Voltage
N5	2.0 BN	241	Ignition 3 Voltage (C6/C7/C8)
N7	1.0 GY	141	Ignition 3 Voltage

Fuse Block - I/P 2 - Label

Fuse Block - I/P 2 - Label Usage

Device	Rating	Description
BRK Circuit Breaker	10A	Brake Warning Lamp, CHMSL Relay
BRK LAMP Relay	--	Trailer Stop Lamps (RQ2/U86/RQ3)
CHMSL Relay	--	Brake Lamps (C4/C5), Tractor/Trailer Wiring (C6/C7/C8)
DRL Relay	--	Daytime Running Lights (DRL)
HTD MIR Relay	--	Outside Rearview Mirror - Driver (DB6/DB8), Outside Rearview Mirror - Passenger (DB6/DB8)
IGN-4 Relay	--	Ignition
LT PARK Circuit Breaker	10A	Left Parking Lamps
LT REAR TRN/STOP Circuit Breaker	10A	Transfer Case Shift Control Switch (NP1)
LT TRN TRLR Relay	--	Left Trailer Turn Signal
MKR LTS Relay	--	Side Marker and Clearance Lamps
PTO Relay	--	Power Take-Off (LF8)
PWR WNDW Circuit Breaker	25A	Power Windows
RDO Circuit Breaker	10A	Radio Blunt Cut
RT PARK Circuit Breaker	10A	Right Parking Lamps
RT REAR TRN/STOP Circuit Breaker	10A	Right Rear Trailer Wiring
RT TRN TRLR Relay	--	Right Trailer Turn Signal

Fuse Block - I/P 2 - Front View

Fuse Block - I/P 2 - Back View

Fuse Block - I/P 2 - Wire Entry

Connector Part Information

OEM: 12129833
Description: 94-Way F Fuse Block (BK)

Terminal Part Information

Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit

Fuse Block - I/P 2 - Wire Entry

Pin	Wire	Circuit	Function
A30	--	--	Not Used
A85	--	--	Not Used
A86	--	--	Not Used
A87	--	--	Not Used
A87A	--	--	Not Used
B30	--	--	Not Used
B85	--	--	Not Used
B86	--	--	Not Used
B87	--	--	Not Used
B87A	--	--	Not Used
C30	--	--	Not Used
C85	--	--	Not Used
C86	--	--	Not Used
C87	--	--	Not Used
C87A	--	--	Not Used
D30	1.0 YE	318	Left Rear Trailer Stop Turn Lamp Supply Voltage
D85	1.0 YE	618	Left Rear Turn Signal Lamp Supply Voltage (C4/C5)
D85	1.0 L-BU	14	Left Turn Signal Status Signal (C6/C7/C8)
D86	0.8 BK	450	Ground
D87	1.0 OG	640	Battery Positive Voltage
D87A	--	--	Not Used
E30	1.0 D-GN	319	Right Rear Trailer Stop Turn Lamp Supply Voltage
E85	1.0 D-GN	619	Right Rear Turn Signal Lamp Supply Voltage (C4/C5)
E85	1.0 D-GN	15	Right Turn Signal Status Signal (C6/C7/C8)
E86	0.8 BK	450	Ground
E87	1.0 OG	640	Battery Positive Voltage
E87A	--	--	Not Used
F30	0.8 OG	267	Heated Mirror Supply Voltage
F85	0.8 BK	450	Ground
F86	0.8 OG	267	Heated Mirror Supply Voltage
F87	0.8 BN	641	Ignition 3 Voltage
F87A	--	--	Not Used
G30	1.0 WH	17	Stop Lamp Supply Voltage
G85	0.5 BK	450	Ground
G86	0.5 L-BU	1320	Stop Lamp Supply Voltage
G87	1.0 YE	895	Left Rear Stop Lamp Supply Voltage
G87A	--	--	Not Used
H30	1.0 TN	12	Headlamp Low Beam Supply Voltage
H85	0.5 L-GN/BK	592	Daytime Running Lights (DRL) Relay Control
H86	0.5 PK	39	Ignition 1 Voltage
H87	1.0 YE	634	DRL Diode Supply Voltage
H87A	1.0 PU	544	Headlamp Low Beam Supply Voltage
J30	1.0 WH	2561	PTO Supply Voltage (LF8)
J85	1.0 L-GN	488	PTO On Switch - Signal (LF8)
J86	1.0 PU	2562	PTO Supply Voltage (LF8)
J87	1.0 PK	539	Ignition 1 Voltage (LF8)
J87A	--	--	Not Used
K30	3.0 RD	1411	Trailer Stop Relay - Contact - N.O.
K85	0.5 L-BU	1320	Stop Lamp Supply Voltage
K86	0.5 BK	450	Ground
K87	3.0 RD	1542	Battery Positive Voltage
K87A	--	--	Not Used
L30	5.0 BK	755	RAP Relay Coil Control
L85	1.0 YE	43	Accessory Voltage
L86	5.0 BK	450	Ground
L87	5.0 RD	1242	Battery Positive Voltage
L87A	--	--	Not Used
M30	1.0 OG	1340	Battery Positive Voltage
M85	0.5 OG/BK	2666	Ignition 1 Voltage
M86	1.0 BN/WH	2609	Right Rear Park Lamps Supply Voltage
M87	1.0 D-GN	21	Marker Lamps Supply Voltage
M87A	--	--	Not Used
N30	1.0 PK	2677	Battery Positive Voltage (LMM)
N85	0.5 PK	239	Ignition 1 Voltage (LMM)
N86	1.0 BK	450	Ground (LMM)
N87	1.0 OG	1440	Battery Positive Voltage (LMM)
N87A	--	--	Not Used
P30	--	--	Not Used
P85	--	--	Not Used
P86	--	--	Not Used
P87	--	--	Not Used
P87A	--	--	Not Used
R1	5.0 BK	755	Battery Positive Voltage
R2	2.0 YE	343	Accessory Voltage
R3	--	755	Battery Positive Voltage Bus
R4	0.8 OG	2040	Battery Positive Voltage
R5	1.0 BN	9	Park Lamp Supply Voltage
R6	1.0 BN	2509	Left Rear Park Lamps Supply Voltage
R7	--	9	Park Lamp Supply Voltage Bus
R8	1.0 BN/WH	2609	Right Rear Park Lamps Supply Voltage
S1-S2	--	--	Not Used
S3	1.0 YE	18	Left Rear Stop Turn Lamp Supply Voltage
S4	1.0 YE	618	Left Rear Turn Signal Lamp Supply Voltage
S5-S6	--	--	Not Used
S7	1.0 WH	17	Stop Lamp Switch Signal
S8	0.5 L-BU	1320	Stop Lamp Supply Voltage
T1-T2	--	--	Not Used
T3	1.0 D-GN	19	Right Rear Stop Turn Lamp Supply Voltage
T4	1.0 D-GN	619	Right Rear Turn Signal Lamp Supply Voltage
T5-T8	--	--	Not Used