Power and Grounding Connector End Views. Chevrolet Chevrolet C-Series Medium Duty Truck B7 2001

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2001 🢒 Chevrolet C-Series Medium Duty Truck B7 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Power and Grounding Connector End Views

Table 1:	ABS Indicator Relay-Relay Block #4
Table 2:	ABS Relay-Relay Block #3 (JE5)
Table 3:	Automatic Transmission Modulator Relay-Relay Block #2 (LG5/MF1)
Table 4:	Automatic Transmission Modulator Relay-Relay Block #5 (L18/MF1)
Table 5:	Daytime Running Lamps (DRL) Relay-Relay Block #4
Table 6:	Ether Injector Control Valve Relay-Relay Block #4 (LG5/KTE)
Table 7:	Fuel Pump (FP) Relay-Relay Block #4 (L18)
Table 8:	Fuseblock - 1
Table 9:	Fuseblock - 2
Table 10:	Fuseblock - I/P (L18)
Table 11:	Fuseblock - I/P (LG5)
Table 12:	Horn Relay-Relay Block #4
Table 13:	Ignition 1 Relay-Relay Block #4
Table 14:	Ignition 1A Relay-Relay Block #5 (L18)
Table 15:	Ignition 1B Relay-Relay Block #5 (L18)
Table 16:	Ignition 3 Relay-Relay Block #1 (LG5)
Table 17:	Ignition Switch (C1) Connector
Table 18:	Ignition Switch (C2) Connector
Table 19:	Relay Block #1
Table 20:	Relay Block #2
Table 21:	Relay Block #3
Table 22:	Relay Block #4
Table 23:	Relay Block #5 (L18)
Table 24:	Starter Relay-Relay Block #2
Table 25:	Taillamp (Lighting) Relay-Relay Block #4
Table 26:	Turn Signal/Hazard Flasher Module-Relay Block #1

ABS Indicator Relay-Relay Block #4

Connector Part Information

•	12077571 Micro Relay System

•	6-Way Micro Relay Module

•	Position C

Wire Color

Circuit No.

Function

BLK

341

Ignition 3 Voltage (L18)

PNK

Ignition 1 Voltage (LG5/JE5)

DK BLU

1899

Brake Lamp Relay Control

BLK

150

Ground

LT GRN

867

ABS Indicator Failure Control

Not Used

ABS Relay-Relay Block #3 (JE5)

Connector Part Information

•	12160504 Fuseblock Base

•	36-Way F Metri-Pack 280 Series, Flexlock (BLK)

•	Position B

Wire Color

Circuit No.

Function

PNK

1939

Ignition 1 Voltage (L18)

BRN

1941

Ignition 3 Voltage (LG5)

PNK

Ignition 1 Voltage (L18)

BLK

341

Ignition 3 Voltage (LG5)

BLK

150

Ground

RED

142

Battery Positive Voltage

Automatic Transmission Modulator Relay-Relay Block #2 (LG5/MF1)

Connector Part Information

•	12160504 Fusebox Base

•	36-Way F Metri-Pack 280 Series, Flexlock (BLK)

•	Position B

Wire Color

Circuit No.

Function

BRN

323

Automatic Transmission Modulator Supply Voltage

BLK

150

Ground

GRY

324

Shift Relay Coil Control

PNK

639

Ignition 1 Voltage

Automatic Transmission Modulator Relay-Relay Block #5 (L18/MF1)

Connector Part Information

•	15369282 Convenience Center Assembly

•	10-Way Relay

•	8-Way Fuse

•	Position D

Wire Color

Circuit No.

Function

PNK

Ignition 1 Voltage

PNK

Ignition 1 Voltage

Not Used

BRN

323

Automatic Transmission Modulator Supply Voltage

GRY

324

Shift Relay Coil Control

Daytime Running Lamps (DRL) Relay-Relay Block #4

Connector Part Information

•	12077571 Micro Relay System

•	6-Way Micro Relay Module

•	Position D

Wire Color

Circuit No.

Function

PNK

Ignition 1 Voltage

LT GRN/BLK

592

DRL Relay Control

LT GRN/BLK

592

DRL Relay Control

TAN

Headlamp Low Beam Supply Voltage

PPL

544

DRL Relay - Contact - N.C.

WHT

815

DRL Diode Signal

Ether Injector Control Valve Relay-Relay Block #4 (LG5/KTE)

Connector Part Information

•	12077571 Micro Relay System

•	6-Way Micro Relay Module

•	Position E

Wire Color

Circuit No.

Function

ORN BLK

434

Neutral Safety Switch Signal

LT GRN

Engine Metal Temperature Sensor [Switch] Signal

ORN

740

Battery Positive Voltage

Not Used

TAN

1997

Ether Injector Control Valve Voltage Supply

Fuel Pump (FP) Relay-Relay Block #4 (L18)

Connector Part Information

•	12077571 Micro Relay System

•	6-Way Micro Relay Module

•	Position E

Wire Color

Circuit No.

Function

DK GRN/WHT

465

Fuel Pump Relay Control

BLK/WHT

451

Ground

GRY

120

Fuel Pump Supply Voltage

RED

490

Fuel Pump Prime Supply Voltage

PNK

739

Ignition 1 Voltage

Fuseblock - 1

Connector Part Information

•	12077569 MaxiFuse® System

•	6-Way Module with left battery feed bus bar (BLK)

Wire Color

Circuit No.

Function

RED

842

Battery Positive Voltage

RED

742

Battery Positive Voltage

RED

642

Battery Positive Voltage

RED

442

Battery Positive Voltage

RED

1442

Battery Positive Voltage (L18)

RED

1342

Battery Positive Voltage (LG5)

RED

1042

Battery Positive Voltage

B1-B6

Not Used

Fuseblock - 2

Connector Part Information

•	12110129 MaxiFuse® System

•	6-Way Module with right battery feed bus bar (BLK)

Wire Color

Circuit No.

Function

RED

1142

Battery Positive Voltage

ORN

240

Battery Positive Voltage (L18)

Not Used (LG5)

RED

142

Battery Positive Voltage

RED

242

Battery Positive Voltage

RED

542

Battery Positive Voltage

RED

342

Battery Positive Voltage

B1-B6

Not Used

Fuseblock - I/P (L18)

Connector Part Information

•	121869094 Fuseblock

•	18-Way AutoFuse® Series, Pack-Con Series V

Wire Color

Circuit No.

Function

BRN

141

Ignition 3 Voltage

Not Used

PNK

Ignition 1 Voltage

PNK

Ignition Switch Ignition 1 Voltage

ORN

640

Battery Positive Voltage

Not Used

BLK

341

Ignition 3 Voltage

ORN

300

Ignition 3 Voltage

Not Used

ORN

140

Battery Positive Voltage

ORN

140

Battery Positive Voltage

RED

842

Battery Positive Voltage

BRN

Ignition 3 Voltage

Not Used

PNK

339

Ignition 1 Voltage

Not Used

GRY

CPP Switch Signal

YEL

Crank Voltage

Not Used

PNK

439

Ignition 1 Voltage

PNK

639

Ignition 1 Voltage

ORN

340

Battery Positive Voltage

Not Used

YEL

Accessory Voltage

BRN

Accessory Voltage

PNK

739

Ignition 1 Voltage

Not Used

ORN

1040

Battery Positive Voltage

RED

342

Battery Positive Voltage

ORN

540

Battery Positive Voltage (JE3)

Not Used (JE5)

RED

Battery Positive Voltage (JE3)

Not Used (JE5)

ORN

1740

Battery Positive Voltage (JE3)

Not Used (JE5)

ORN

1470

Brake Booster Pump Motor Supply Voltage (JE3)

Not Used (JE5)

ORN

1540

Battery Positive Voltage

Not Used

Fuseblock - I/P (LG5)

Connector Part Information

•	15326548 Fuseblock

•	18-Way AutoFuse® Series, Pack-Con Series V

Wire Color

Circuit No.

Function

BRN

141

Ignition 3 Voltage

Not Used

PNK

Ignition 1 Voltage

PNK

Ignition Switch Ignition 1 Voltage

ORN

640

Battery Positive Voltage

Not Used

BLK

341

Ignition 3 Voltage

ORN

300

Ignition 3 Voltage

BRN

241

Ignition 3 Voltage

BRN

641

Ignition 3 Voltage

ORN

140

Battery Positive Voltage

RED

842

Battery Positive Voltage

BRN

Ignition 3 Voltage

Not Used

ORN

Battery Positive Voltage

Not Used

GRY

CPP Switch Signal

YEL

Crank Voltage

BRN

241

Ignition 3 Voltage

BRN

441

Ignition 3 Voltage

ORN

840

Battery Positive Voltage

RED

442

Battery Positive Voltage

ORN

340

Battery Positive Voltage

Not Used

YEL

Accessory Voltage

BRN

Accessory Voltage

ORN

740

Battery Positive Voltage

Not Used

ORN

1040

Battery Positive Voltage

RED

342

Battery Positive Voltage

ORN

540

Battery Positive Voltage (JE3)

Not Used (JE5)

RED

Battery Positive Voltage (JE3)

Not Used (JE5)

ORN

1740

Battery Positive Voltage (JE3)

Not Used (JE5)

ORN

1470

Brake Booster Pump Motor Supply Voltage (JE3)

Not Used (JE5)

ORN

1540

Battery Positive Voltage

Not Used

Horn Relay-Relay Block #4

Connector Part Information

•	12077571 Micro Relay System

•	6-Way Micro Relay Module

•	Position B

Wire Color

Circuit No.

Function

ORN

140

Battery Positive Voltage

BLK

Horn Relay Control

ORN

140

Battery Positive Voltage

ORN

140

Battery Positive Voltage

Not Used

DK GRN

Horn Control

Ignition 1 Relay-Relay Block #4

Connector Part Information

•	12077571 Micro Relay System

•	6-Way Micro Relay Module

•	Position A

Wire Color

Circuit No.

Function

PNK

Ignition 1 Voltage

BLK

150

Ground

RED

442

Battery Positive Voltage (L18)

ORN

Battery Positive Voltage (LG5)

Not Used

PNK

639

Ignition 1 Voltage

PNK

639

Ignition 1 Voltage (LG5 w/o MX4/MTW)

Ignition 1A Relay-Relay Block #5 (L18)

Connector Part Information

•	15369282 Convenience Center Assembly

•	10-Way Relay

•	8-Way Fuse

•	Position E

Wire Color

Circuit No.

Function

RED

1442

Battery Positive Voltage

PNK

Ignition 1 Voltage

Not Used

PNK

539

Ignition 1 Voltage

BLK

150

Ground

Ignition 1B Relay-Relay Block #5 (L18)

Connector Part Information

•	15369282 Convenience Center Assembly

•	10-Way Relay

•	8-Way Fuse

•	Position F

Wire Color

Circuit No.

Function

ORN

240

Battery Positive Voltage

PNK

Ignition 1 Voltage

Not Used

PNK

139

Ignition 1 Voltage

BLK

150

Ground

Ignition 3 Relay-Relay Block #1 (LG5)

Connector Part Information

•	12077574 Mini Relay System

•	2-Way Mini Relay Module

•	Position A

Wire Color

Circuit No.

Function

BRN

341

Ignition 3 Voltage

BLK

150

Ground

RED/BLK

1342

Battery Positive Voltage

Not Used

BRN

241

Ignition 3 Voltage

Ignition Switch (C1) Connector

Connector Part Information

•

12010966

•	5-Way F 56 Series (BLU)

Wire Color

Circuit No.

Function

YEL

Crank Voltage

Not Used

PNK

Ignition Output

RED

642

Battery Positive Voltage

BRN

Accessory Voltage

Ignition Switch (C2) Connector

Connector Part Information

•

06294641

•	4-Way F 56/59 Series (BLK)

Wire Color

Circuit No.

Function

ORN

300

Ignition 3 Voltage

RED

242

Battery Positive Voltage

WHT/BLK

235

Bulb Test - Signal

LT BLU

1134

Park Brake Switch Signal

Relay Block #1

Connector Part Information

•	12077574 Mini Relay System

•	2-Way Mini Relay Module

Wire Color

Circuit No.

Function

BRN

341

Ignition 3 Voltage (LG5)

Not Used (L18)

BLK

150

Ground (LG5)

Not Used (L18)

RED/BLK

1342

Battery Positive Voltage (LG5)

Not Used (L18)

Not Used

BRN

241

Ignition 3 Voltage (LG5)

Not Used (L18)

BLK

150

Ground

ORN

1540

Battery Positive Voltage

B3-B4

Not Used

PPL

Turn Signal Flasher Signal

BRN

Hazard Flasher Signal

Relay Block #2

Connector Part Information

•	12160504 Fusebox Base

•	36-Way F Metri-Pack 280 Series, Flexlock (BLK)

Wire Color

Circuit No.

Function

A1-A9

Not Used

PPL

Starter Solenoid Crank Voltage

Not Used

ORN/BLK

434

Neutral Safety Switch Signal (LG5/MF1)

Clutch Switch Signal (LG5/Manual Transmission)

PPL

806

Crank Voltage (L18)

Not Used

BRN

323

Automatic Transmission Modulator Supply Voltage (LG5/MF1)

Not Used (L18)

Not Used

BLK

150

Ground (LG5/MF1)

Not Used (L18)

B8-B9

Not Used

BLK

150

Ground (LG5)

YEL

447

Starter Relay Coil Control (L18)

Not Used

RED

542

Battery Positive Voltage

Not Used

GRY

324

Shift Relay Coil Control (LG5/MF1)

Not Used (L18)

Not Used

PNK

639

Ignition 1 Voltage (LG5/MF1)

Not Used (L18)

C8-C9

Not Used

D1-D9

Not Used

Relay Block #3

Connector Part Information

•	12160504 Fuseblock Base

•	36-Way F Metri-Pack 280 Series, Flexlock (BLK)

Wire Color

Circuit No.

Function

A1-A9

Not Used

B1-B4

Not Used

PNK

1939

Ignition 1 Voltage (L18/JE5)

BRN

1941

Ignition 3 Voltage (LG5/JE5)

Not Used (JE3)

Not Used

PNK

Ignition 1 Voltage (L18/JE5)

BLK

341

Ignition 3 Voltage (LG5/JE5)

Not Used (JE3)

B8-B9

Not Used

C1-C4

Not Used

BLK

150

Ground (JE5)

Not Used (JE3)

Not Used

RED

142

Battery Positive Voltage (JE5)

Not Used (JE3)

C8-C9

Not Used

D1-D9

Not Used

Relay Block #4

Connector Part Information

•	12077571 Micro Relay System

•	6-Way Micro Relay Module

Wire Color

Circuit No.

Function

PNK

Ignition 1 Voltage

BLK

150

Ground

RED

442

Battery Positive Voltage (L18)

ORN

Battery Positive Voltage (LG5)

Not Used

PNK

639

Ignition 1 Voltage

PNK

639

Ignition 1 Voltage (LG5 w/o MX4/MTW)

ORN

140

Battery Positive Voltage

BLK

Horn Relay Control

ORN

140

Battery Positive Voltage

ORN

140

Battery Positive Voltage

Not Used

DK GRN

Horn Control

BLK

341

Ignition 3 Voltage

PNK

Ignition 1 Voltage (LG5/JE5)

DK BLU

1899

Brake Lamp Relay Control

BLK

150

Ground

LT GRN

867

ABS Indicator Failure Control

Not Used

PNK

Ignition 1 Voltage

LT GRN/BLK

592

DRL Relay Control

LT GRN/BLK

592

DRL Relay Control

TAN

Headlamp Low Beam Supply Voltage

PPL

544

DRL Relay - Contact - N.C.

WHT

815

DRL Diode Signal

DK GRN/WHT

465

Fuel Pump Relay Control (L18)

ORN BLK

434

Neutral Safety Switch Signal (LG5)

BLK/WHT

451

Ground (L18)

LT GRN

Engine Metal Temperature Sensor [Switch] Signal (LG5)

GRY

120

Fuel Pump Supply Voltage (L18)

ORN

740

Battery Positive Voltage (LG5)

RED

490

Fuel Pump Prime Supply Voltage (L18)

Not Used (LG5)

PNK

739

Ignition 1 Voltage (L18)

TAN

1997

Ether Injector Control Valve Voltage Supply (LG5)

LT BLU

Headlamp Switch Park Lamps Signal

BLK

150

Ground

ORN

340

Battery Positive Voltage

Not Used

BRN

Park Lamp Supply Voltage

Relay Block #5 (L18)

Connector Part Information

•	15369282 Convenience Center Assembly

•	10-Way Relay

•	8-Way Fuse

Wire Color

Circuit No.

Function

A1-A6

Not Used

B1-B6

Not Used

PNK

Ignition 1 Voltage

PNK

Ignition 1 Voltage

Not Used

BRN

323

Automatic Transmission Modulator Supply Voltage

GRY

324

Shift Relay Coil Control

RED

1442

Battery Positive Voltage

PNK

Ignition 1 Voltage

Not Used

PNK

539

Ignition 1 Voltage

BLK

150

Ground

ORN

240

Pattern Positive Voltage

PNK

Ignition 1 Voltage

Not Used

PNK

139

Ignition 1 Voltage

BLK

150

Ground

G1-G5

Not Used

H1-H5

Not Used

J1-J5

Not Used

K1-K5

Not Used

PNK

639

Ignition 1 Voltage (MX4/MTW)

Not Used (w/o MX4/MTW)

L2-L4

Not Used

PNK

539

Ignition 1 Voltage (MX4/MTW)

Not Used (w/o MX4/MTW)

M2-M4

Not Used

PNK

539

Ignition 1 Voltage

RED

1442

Battery Positive Voltage

PNK

1239

Ignition 1 Voltage

PNK

1039

Ignition 1 Voltage

PNK

839

Ignition 1 Voltage

ORN

1040

Battery Positive Voltage

139

Bussed from terminal P4

PNK

139

Ignition 1 Voltage, bussed to terminal P3

Starter Relay-Relay Block #2

Connector Part Information

•	12160504 Fusebox Base

•	36-Way F Metri-Pack 280 Series, Flexlock (BLK)

•	Position A

Wire Color

Circuit No.

Function

PPL

Starter Solenoid Crank Voltage

PPL

806

Crank Voltage (L18)

BLK

150

Ground (LG5)

YEL

447

Starter Relay Coil Control (L18)

RED

542

Battery Positive Voltage

Taillamp (Lighting) Relay-Relay Block #4

Connector Part Information

•	12077571 Micro Relay System

•	6-Way Micro Relay Module

•	Position F

Wire Color

Circuit No.

Function

LT BLU

Headlamp Switch Park Lamps Signal

BLK

150

Ground

ORN

340

Battery Positive Voltage

Not Used

BRN

Park Lamp Supply Voltage

Turn Signal/Hazard Flasher Module-Relay Block #1

Connector Part Information

•	12077574 Mini Relay System

•	2-Way Mini Relay Module

•	Position B

Wire Color

Circuit No.

Function

BLK

150

Ground

ORN

1540

Battery Positive Voltage

B3-B4

Not Used

PPL

Turn Signal Flasher Signal

BRN

Hazard Flasher Signal