| Table 1: | Fuse Block - Underhood (Primary) Label Usage |
| Table 2: | Fuse Block - Underhood (Primary) Wire Entry |
| Table 3: | Fuse Block - Underhood (Secondary) Label Usage |
| Table 4: | Fuse Block - Underhood (Secondary) Wire Entry |
| Table 5: | Fuse Block - I/P - 1 Label Usage |
| Table 6: | Fuse Block - I/P - 1 Wire Entry |
| Table 7: | Fuse Block - I/P - 2 Label Usage |
| Table 8: | Fuse Block - I/P - 2 Wire Entry |
Fuse Block - Underhood (Primary) Label
Device | Rating | Description |
|---|---|---|
|
Important:: Numbers shown are to reference position only - component not marked. | ||
NOTE 1 RELAY | -- | LG4 Power Control Valve, L18/LB7 Fuel Pump, LG5 Heated Fuel |
IGN B RELAY | -- | Ignition |
STARTER RELAY | -- | Starter |
HORN RELAY | -- | Horn |
IGN A RELAY | -- | Ignition |
PTO RELAY | -- | Power Take-Off (PTO) |
REVERSE RELAY | -- | Reverse |
NEUTRAL START RELAY | -- | Neutral Start |
RR DEFOG FUSE | 30A | HVAC Control Assembly |
ENG 1 FUSE | 10A | PCV Relay (LG4) PTO Switch, Overdrive Defeat, Switch Rear Axle Actuator (LG5/L18/LB7) |
ENG 3 FUSE | 15A | Fuel Injectors (LG4) PTO Relay, Reverse Relay (L18/LG5) Intake Air Heater Relay (LG5) FICM (LB7) |
PCM-B FUSE | 10A | Serial Data Gateway, PCM (L18) ECM (All Others) TCM, ECM Relay (LG4) |
BLANK FUSE | -- | -- |
ENG 4 FUSE | 15A | Cruise Control Switch |
ENG 2 FUSE | 10A | ECM, Heated Fuel Relay, Exhaust Relay, Fuel Injectors |
HTD FUEL FUSE | 20A | Heated Fuel Relay, Fuel Pump Relay |
SPARE FUSE | -- | -- |
SPARE FUSE | -- | -- |
Fuse Block - Underhood (Primary) Top View
Fuse Block - Underhood (Primary) Bottom View
Connector Part Information |
| ||||||
|---|---|---|---|---|---|---|---|
Pin | Wire Color | Circuit No. | Function | ||||
A1 | PU | 2675 | Fuel Pump Relay Control - Primary (C8/LG5) | ||||
D-GN/ WH | 465 | Fuel Pump Relay Control - Primary (C8/LG5) | |||||
A3 | OG | 1640 | Battery Positive Voltage (C8) | ||||
L-GN | 260 | Fuel Injection Control (LG4) | |||||
A4 | RD | 1042 | Battery Positive Voltage (LB7) | ||||
PK | 439 | Ignition 1 Voltage (L18/ LG4/LG5) | |||||
A6 | RD | 1042 | Battery Positive Voltage | ||||
A7 | D-GN | 1433 | Clutch Start Switch Signal (LG5) | ||||
PU | 806 | Crank Voltage (L18/LG4/LB7) | |||||
A9 | RD | 242 | Battery Positive Voltage | ||||
B1 | OG | 1540 | Battery Positive Voltage (LG4) | ||||
GY | 2677 | Battery Positive Voltage (L18/LB7) | |||||
B2 | -- | -- | Not Used | ||||
B3 | BK | 250 | Ground | ||||
B4 | PU | 2000 | Ignition 1 Voltage | ||||
B5 | -- | -- | Not Used | ||||
B6 | GY/BK | 2219 | FICM Relay Control | ||||
B7 | PU | 6 | Starter Solenoid Crank Voltage (L18/LG4/LB7) | ||||
PU/WH | 2667 | Starter Solenoid Crank Voltage (LG5) | |||||
B8 | -- | -- | Not Used | ||||
B9 | YE | 447 | Starter Relay Coil Control | ||||
C1 | OG | 740 | Battery Positive Voltage | ||||
C3 | OG | 740 | Battery Positive Voltage | ||||
C4 | PK | 439 | Ignition 1 Voltage | ||||
C6 | RD | 1042 | Battery Positive Voltage | ||||
D1 | D-GN | 29 | Horn Control | ||||
D2 | -- | -- | Not Used | ||||
D3 | BK | 28 | Horn Relay Control | ||||
D4 | PU | 2000 | Ignition 1 Voltage | ||||
D5 | -- | -- | Not Used | ||||
D6 | BK | 250 | Ground | ||||
D7 | PK | 539 | Ignition 1 Voltage (LG5) | ||||
L-GN | 488 | Ignition 1 Voltage (L18/LB7/LG4) | |||||
D9 | PK | 539 | Ignition 1 Voltage (LG5) | ||||
WH | 2561 | Ignition 1 Voltage (L18/LB7/LG4) | |||||
E7 | WH | 2561 | Ignition 1 Voltage (L18/LB7/LG4) | ||||
D-GN/WH | 2665 | Ignition 1 Voltage (LG5) | |||||
E8 | -- | -- | Not Used | ||||
E9 | L-GN | 488 | Ignition 1 Voltage (LG5) | ||||
PU | 2562 | Ignition 1 Voltage (L18/LB7/LG4) | |||||
F1 | RD | 2 | Battery Positive Voltage | ||||
F3 | PU | 2000 | Ignition Voltage Bus | ||||
F5 | PU | 2000 | Ignition Voltage Bus | ||||
F7 | RD | 2 | Battery Positive Voltage | ||||
F9 | L-GN | 24 | Backup Lamp Supply Voltage | ||||
L-GN | 24 | Backup Lamp Supply Voltage | |||||
F11 | GY | 1524 | Backup Lamp Supply Voltage/Backup Lamp Relay Control/Backup Lamp Signal | ||||
G2 | PU | 1093 | Rear Defog Element Supply Voltage | ||||
G4 | PK | 239 | Ignition 1 Voltage | ||||
G6 | PK | 539 | Ignition 1 Voltage | ||||
G8 | OG | 440 | Battery Positive Voltage | ||||
G10 | -- | -- | Not Used | ||||
G12 | -- | -- | Not Used | ||||
H1 | -- | -- | Not Used | ||||
H3 | PU | 2000 | Ignition Voltage | ||||
H5 | PU | 2000 | Ignition Voltage | ||||
H7 | RD | 2 | Battery Positive Voltage | ||||
H9 | PK | 539 | Ignition 1 Voltage | ||||
H11 | PK | 139 | Ignition 1 Voltage | ||||
J2 | -- | -- | Not Used | ||||
J4 | PK | 639 | Ignition 1 Voltage | ||||
J6 | PK | 339 | Ignition 1 Voltage | ||||
J8 | OG | 1440 | Battery Positive Voltage | ||||
J10 | D-GN | 1433 | Clutch Start Switch Signal | ||||
J12 | YE | 1479 | A/T Neutral Signal | ||||
K1 | -- | -- | Not Used | ||||
K3 | -- | -- | Not Used | ||||
K5 | -- | -- | Not Used | ||||
K7 | RD | 2 | Battery Positive Voltage Bus | ||||
K9-L2 | -- | -- | Not Used | ||||
L4 | OG | 1240 | Battery Positive Voltage | ||||
L6 | OG | 1240 | Battery Positive Voltage | ||||
L8 | OG | 1240 | Battery Positive Voltage | ||||
L10 | BK | 250 | Ground | ||||
L12 | PU | 806 | Crank Voltage | ||||
M1 | RD | 442 | Battery Positive Voltage | ||||
M2 | RD | 1642 | Battery Positive Voltage | ||||
M3 | RD | 42 | Battery Positive Voltage | ||||
M4 | RD | 1042 | Battery Positive Voltage | ||||
RD | 1042 | Battery Positive Voltage | |||||
M5 | OG | 1840 | Battery Positive Voltage | ||||
M6 | OG | 740 | Battery Positive Voltage | ||||
M7 | OG | 1640 | Battery Positive Voltage | ||||
M8 | -- | -- | Not Used | ||||
N1 | -- | -- | Not Used | ||||
N2 | -- | -- | Not Used | ||||
N3 | -- | -- | Not Used | ||||
N4 | -- | -- | Not Used | ||||
N5 | -- | -- | Not Used | ||||
N6 | -- | -- | Not Used | ||||
N7 | -- | -- | Not Used | ||||
N8 | -- | -- | Not Used | ||||
Fuse Block - Underhood (Secondary) Label
No. | Device | Rating | Description |
|---|---|---|---|
1 | IGN 1 Fuse | 50A | Ignition Switch, Transfer Case Shift Control Module (NP1) |
2 | IGN 4 Fuse | 40A | Ignition 4 Relay |
3 | IGN 3 Fuse | 50A | Ignition Switch |
4 | BAT/HAZ Fuse | 60A | Fuse Block - I/P |
5 | HDLP Fuse | 60A | Headlamp Switch, Fuse Block - I/P |
6 | LIGHTING Fuse | 50A | Courtesy Fuse, Park Fuse |
7 | HVAC Fuse | 40A | Blower Motor Resistor Assembly (C40/C60) |
8 | BRKLP Circuit Breaker | 30A | Brake Lamps (C6/C7/C8) |
ELEC BRK Circuit Breaker | Electronic Brake Control Module (EBCM) (C4/C5) |
Fuse Block - Underhood (Secondary) Top View
Fuse Block - Underhood (Secondary) Bottom View
Connector Part Information |
| ||||||
|---|---|---|---|---|---|---|---|
Pin | Wire Color | Circuit No. | Function | ||||
A1 | RD | 242 | Battery Positive Voltage | ||||
A2 | RD | 1242 | Battery Positive Voltage | ||||
A3 | RD | 342 | Battery Positive Voltage | ||||
A4 | RD | 142 | Battery Positive Voltage | ||||
A5 | RD | 1142 | Battery Positive Voltage | ||||
A6 | RD | 1342 | Battery Positive Voltage | ||||
A7 | RD | 542 | Battery Positive Voltage | ||||
A8 | RD | 642 | Battery Positive Voltage | ||||
B1 | -- | 1 | Battery Positive Voltage Bus | ||||
B2 | -- | 1 | Battery Positive Voltage Bus | ||||
B3 | -- | 1 | Battery Positive Voltage Bus | ||||
B4 | -- | 1 | Battery Positive Voltage Bus | ||||
B5 | -- | 1 | Battery Positive Voltage Bus | ||||
B6 | -- | 1 | Battery Positive Voltage Bus | ||||
B7 | -- | 1 | Battery Positive Voltage Bus | ||||
B8 | -- | 1 | Battery Positive Voltage Bus | ||||
Fuse Block - I/P - 1 Label
Fuse No. | Device | Rating | Description |
|---|---|---|---|
1 | STOP | 20A | Stop Lamp Switch, Trailer Stop Lamp Switch |
2 | CHMSL | 20A | CHMSL Relay |
3 | PARK | 20A | Headlamp Switch |
4 | PCM - 1 | 15A | EBCM, PCM, ECM, TAC |
5 | AUX RLY | 15 | Battery ISO, DRL Module, Outside Heated Mirror Switch, Heated Mirror Relay |
6 | HTR/AC | 20A | Air Temp Actuator, Vacuum Pump, HVAC Control Assembly, Blower Motor Relay-Aux |
7 | HAZARD | 25A | Turn Signal/Multifunction Switch |
8 | PWR ST | 20A | Cigar Lighter, Diagnostic Tool Connector, Aux Power 1, 2 DLC |
9 | COURTESY | 10A | Dome Lamps |
10 | GAUGES | 10A | (RCDLR) Headlamp Switch, DRL Relay, Instrument Panel Gage Cluster, DIC, IPC |
11 | START | 10A | Starter Relay, Clutch Start Switch, PNP Switch, Neutral Start Relay, EBCM |
12 | AXLE/4WD | 20A | Rear Axle Shift Relay-Two Speed |
13 | TRLR TRN/HAZ | 20A | Left Turn Trailer Relay, Right Turn Trailer Relay |
14 | RADIO/CHIME | 20A | Radio, Chime Module, IPC |
15 | DRL | 15A | Daytime Running Lamps Diode |
16 | SIR | 10A | Inflatable Restraint I/P Module Switch (Pickup Only), and Inflatable Restraint Sensing and Diagnostic Module (SDM) |
17 | ILLUM | 10A | IPC, HVAC Control Assembly, Inflatable Restraint Disable Switch, Radio, Transfer Case Shift Control Switch |
18 | BRAKE | 10A | A/C Compressor Clutch Relay, High Idle Switch, Clutch Pedal Position, Air Brake Relay, Stop Lamp Switch |
19 | PWR/ACCY | 20A | Blower Motor Relay-Aux, Outside Rearview Mirror, Door Lock Switch, Remote Control Door Lock Receiver |
20 | IGN 4 | 25A | IGN 4 Relay, IPC, Windshield Wiper Motor, Turn Signal Multifunction Switch |
21 | MARKER LAMP | 20A | Marker Lamp Relay |
22 | TURN/BACKUP | 20 | Reverse Relay, PNP Switch, Backup Lamp Switch, Turn Signal/Multifunction Switch |
23 | TRANS | 15A | SDG, IPC, TCM, ECM |
24 | CHASSIS | 15 | Low Air Pressure Switch, Air Brake Dryer, Traction Control Switch, Air Suspension Dump Switch |
A | SPARE | -- | -- |
B | SPARE | -- | -- |
Fuse Block - I/P - 1 Front View
Fuse Block - I/P - 1 Back View
Connector Part Information |
| ||||||
|---|---|---|---|---|---|---|---|
Pin | Wire Color | Circuit No. | Function | ||||
A2 | -- | -- | Not Used | ||||
A3 | -- | -- | Not Used | ||||
A6 | -- | -- | Not Used | ||||
A7 | -- | -- | Not Used | ||||
B2 | -- | -- | Not Used | ||||
B4 | RD | 142 | Battery Positive Voltage | ||||
B6 | -- | -- | Not Used | ||||
B8 | -- | -- | Not Used | ||||
C1 | OG | 540 | Battery Positive Voltage | ||||
C3 | OG | 640 | Battery Positive Voltage Inadvertent Power Relay Enable | ||||
C5 | OG | 1040 | Battery Positive Voltage | ||||
C7 | OG | 140 | Battery Positive Voltage | ||||
D2 | BN | 4 | Accessory Voltage | ||||
D4 | -- | -- | Not Used | ||||
D6 | RD | 142 | Battery Positive Voltage | ||||
D8 | -- | -- | Not Used | ||||
E1 | YE | 43 | Accessory Voltage | ||||
E3 | OG | 1140 | Battery Positive Voltage | ||||
E5 | OG | 840 | Battery Positive Voltage | ||||
E7 | OG | 1740 | Battery Positive Voltage | ||||
F2 | -- | -- | Not Used | ||||
F4 | RD | 1142 | Battery Positive Voltage | ||||
F6 | -- | -- | Not Used | ||||
F8 | RD | 1342 | Battery Positive Voltage | ||||
G1 | OG | 1340 | Battery Positive Voltage | ||||
G3 | OG | 340 | Battery Positive Voltage | ||||
G5 | OG | 40 | Battery Positive Voltage | ||||
G7 | OG | 240 | Battery Positive Voltage | ||||
H2 | -- | -- | Not Used | ||||
H4 | PK | 3 | Ignition 1 Voltage | ||||
H6 | -- | -- | Not Used | ||||
H8 | -- | -- | Not Used | ||||
J1 | PK | 139 | Ignition 1 Voltage | ||||
J3 | YE | 1139 | Ignition 1 Voltage | ||||
J5 | PK | 39 | Ignition 1 Voltage | ||||
J7 | PK | 439 | Ignition 1 Voltage | ||||
K2 | WH | 1390 | Off Run Crank Voltage | ||||
K4 | D-GN | 44 | Instrument Panel Lamps Dimmer Switch Signal | ||||
K6 | YE | 5 | Crank Voltage | ||||
K8 | OG | 300 | Ignition 3 Voltage | ||||
L1 | PK | 1020 | Off Run Crank Voltage | ||||
L3 | GY | 8 | Instrument Panel Lamp Supply Voltage 1 | ||||
L5 | PU | 806 | Crank Voltage | ||||
L7 | BN | 641 | Ignition 3 Voltage | ||||
M2 | -- | -- | Not Used | ||||
M4 | OG | 300 | Ignition 3 Voltage | ||||
M6 | -- | -- | Not Used | ||||
M8 | -- | -- | Not Used | ||||
N1 | BN | 541 | Ignition 3 Voltage | ||||
N3 | BN | 441 | Ignition 3 Voltage | ||||
N5 | -- | -- | Not Used | ||||
N7 | BN | 141 | Ignition 3 Voltage | ||||
Fuse Block - I/P - 2 Label
Device | Rating | Description |
|---|---|---|
|
Important: Numbers shown are to reference position only - component not marked. | ||
RT PARK FUSE | 10A | Right-Hand Parking Lamps |
LT PARK FUSE | 10A | Left-Hand Parking Lamps |
RADIO FUSE | 10A | Radio |
PWR WDO FUSE | 25A | Power Windows |
BRAKE ISO FUSE | 10A | Brake Warning Lamp |
SPARE FUSE | -- | SPARE FUSE |
L-RR TRUCK FUSE | 15A | Front Axle Actuator, Transfer Case Shift Control Switch, Auxiliary Battery Relay |
SPARE FUSE | -- | Spare Fuse |
SPARE FUSE | -- | Spare Fuse |
SPARE FUSE | -- | Spare Fuse |
R-RR TRUCK FUSE | 15A | Right Rear Trailer Wiring |
SPARE FUSE | -- | Spare Fuse |
BRAKE LAMP RELAY | -- | C4/C5 Brake Lamps, C6/C7/C8 Tractor/Trailer Wiring |
IGN 4 RELAY | -- | Ignition |
MARKER LP RELAY | -- | Side Marker and Clearance Lamps |
HTD FUEL RELAY | -- | LB7/LG4 Heater |
AIR HTR RELAY | -- | LG4 Air Heater |
ECU MAINTAIN RELAY | -- | LG4 Electronic Control Unit |
DRL RELAY | -- | Daytime Running Lamps |
CHMSL ISO RELAY | -- | Center High Mounted Stop Lamp |
HTD MIR RELAY | -- | Heated Mirror |
R-TRN TLR RELAY | -- | Right Trailer Turn Signal |
L-TRN TLR RELAY | -- | Left Trailer Turn Signal |
SPARE RELAY | -- | Spare Relay |
SPARE RELAY | -- | Spare Relay |
SPARE RELAY | -- | Spare Relay |
Fuse Block - I/P - 2 Front View
Fuse Block - I/P - 2 Back View
Connector Part Information |
| ||||||
|---|---|---|---|---|---|---|---|
Pin | Wire Color | Circuit No. | Function | ||||
A30 | -- | -- | Not Used | ||||
A85 | -- | -- | Not Used | ||||
A87A | -- | -- | Not Used | ||||
A87 | -- | -- | Not Used | ||||
A86 | -- | -- | Not Used | ||||
B30 | -- | -- | Not Used | ||||
B85 | -- | -- | Not Used | ||||
B87A | -- | -- | Not Used | ||||
B87 | -- | -- | Not Used | ||||
B86 | -- | -- | Not Used | ||||
C30 | -- | -- | Not Used | ||||
C85 | -- | -- | Not Used | ||||
C87A | -- | -- | Not Used | ||||
C87 | -- | -- | Not Used | ||||
C86 | -- | -- | Not Used | ||||
D30 | YE | 318 | Left Rear Trailer Stop Turn Lamp Supply Voltage | ||||
D85 | YE | 618 | Left Rear Turn Signal Lamp Supply Voltage | ||||
L-BU | 14 | Left Turn Signal Status Signal | |||||
D87A | -- | -- | Not Used | ||||
D86 | BK | 450 | Ground | ||||
D87 | OG | 640 | Battery Positive Voltage Inadvertent Power Relay Enable | ||||
E30 | D-GN | 319 | Right Rear Trailer Stop Turn Lamp Supply Voltage | ||||
E85 | D-GN | 619 | Right Rear Turn Signal Lamp Supply Voltage (FAM 2) | ||||
E87A | D-GN | 15 | Right Turn Signal Status Signal (FAM 3) | ||||
E86 | BK | 450 | Ground | ||||
E87 | OG | 640 | Battery Positive Voltage Inadvertent Power Relay Enable | ||||
F30 | OG | 267 | Heated Mirror Rear Defog Relay Coil Supply Voltage | ||||
F85 | BK | 450 | Ground | ||||
F86 | OG | 267 | Heated Mirror Rear Defog Relay Coil Supply Voltage | ||||
F87A | -- | -- | Not Used | ||||
F87 | BN | 641 | Ignition 3 Voltage | ||||
G30 | OG | 1740 | Battery Positive Voltage | ||||
G85 | BK | 450 | Ground | ||||
G87A | -- | -- | Not Used | ||||
G86 | L-BU | 1320 | CHMSL Supply Voltage Stop Lamp Supply Voltage | ||||
G87 | YE | 895 | Left Rear Stop Lamp Supply Voltage | ||||
H30 | TN | 12 | Headlamp Low Beam Supply Voltage | ||||
H85 | L-GN/BK | 592 | DRL Relay Control | ||||
H86 | PK | 39 | Ignition 1 Voltage | ||||
H87 | YE | 634 | DRL Diode Supply Voltage | ||||
H87A | PU | 544 | Headlamp Low Beam Supply Voltage | ||||
J30 | BK/WH | 1120 | ECM Power | ||||
J85 | OG | 440 | Battery Positive Voltage | ||||
J87A | -- | -- | Not Used | ||||
J86 | L-BU | 1121 | ECM Power Enable | ||||
J87 | OG | 440 | Battery Positive Voltage | ||||
K30 | RD | 1411 | Trailer Stop Relay - Contact - N.O. | ||||
K85 | L-BU | 1320 | CHMSL Supply Voltage Stop Lamp Supply Voltage | ||||
K86 | BK | 450 | Ground | ||||
K87A | -- | -- | Not Used | ||||
K87 | RD | 1542 | Battery Positive Voltage | ||||
L30 | BK | 755 | RAP Relay Coil Control | ||||
L85 | YE | 43 | Accessory Voltage | ||||
L87A | -- | -- | Not Used | ||||
L86 | BK | 450 | Ground | ||||
L87 | RD | 1242 | Battery Positive Voltage | ||||
M30 | OG | 1340 | Battery Positive Voltage | ||||
M85 | OG/BK | 2666 | Ignition 1 Voltage | ||||
M87A | -- | -- | Not Used | ||||
M86 | BN/WH | 2609 | Right Rear Park Lamps Supply Voltage | ||||
M87 | D-GN | 21 | Roof Clearance Lamp Switch Signal | ||||
N30 | PK | 2677 | Battery Positive Voltage | ||||
N85 | PK | 339 | Ignition 1 Voltage | ||||
N87A | -- | -- | Not Used | ||||
N86 | BK | 450 | Ground | ||||
N87 | OG | 1440 | Battery Positive Voltage | ||||
P30 | GY | 5481 | Ground | ||||
P85 | BK/WH | 1120 | Ground | ||||
P87A | -- | -- | Not Used | ||||
P86 | BN | 5347 | Ground | ||||
P87 | BK/WH | 1120 | Ground | ||||
R1 | RD | 9 | Park Lamp Supply Voltage Bus | ||||
R2 | YE | 343 | Accessory Voltage | ||||
R3 | BN | 9 | Park Lamp Supply Voltage | ||||
R4 | OG | 2040 | Battery Positive Voltage | ||||
R5 | RD | 9 | Park Lamp Supply Voltage Bus | ||||
R6 | BN | 2509 | Left Rear Park Lamps Supply Voltage Left Rear Park Lamps and License Lamps Supply Voltage | ||||
R7 | -- | -- | Not Used | ||||
R8 | BN/WH | 2609 | Right Rear Park Lamps Supply Voltage | ||||
S1-S2 | -- | -- | Not Used | ||||
S3 | YE | 18 | Left Rear Stop Turn Lamp Supply Voltage | ||||
S4 | YE | 618 | Left Rear Turn Signal Lamp Supply Voltage | ||||
S5-S6 | -- | -- | Not Used | ||||
S7 | WH | 17 | Stop Lamp Switch Signal | ||||
S8 | L-BU | 1320 | CHMSL Supply Voltage Stop Lamp Supply Voltage | ||||
T1-T2 | -- | -- | Not Used | ||||
T3 | D-GN | 19 | Right Rear Stop Turn Lamp Supply Voltage | ||||
T4 | D-GN | 619 | Right Rear Turn Signal Lamp Supply Voltage | ||||
T5-T7 | -- | -- | Not Used | ||||
T9-T7 | -- | -- | Not Used | ||||
