Hummer H1 (2006+). Manual - part 393

12-248

Electrical System

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C72/16 WAY LOCKING DIFFERENTIAL CONTROL MODULE CONNECTOR LOCATION BEHIND 
CENTER CONSOLE.

pin

ckt

color

description

A1

--

--

--

A2

--

--

--

A3

--

--

--

A4

--

--

--

A5

784

DB

Low range switch signal (-)

A6

136

BK

Vehicle speed input (+)

A7

879

WH/BK

Warning light activation signal

A8

878

LG/BK

Warning light activation signal

B1

352

BK

Vehicle speed input (-)

B2

--

--

--

B3

--

--

--

B4

866

OR

Rear locker switch input signal

B5

868

GY

Axle “ON” indicator signal (-)

B6

875

PK

Front locker switch input signal

B7

877

GY/BK

Axle “ON” indicator signal (-)

B8

860

RD

+12v fused ignition input

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 Electrical System  12-249

C73/ 6 WAY LOCKING DIFFERENTIAL CONTROL MODULE CONNECTOR LOCATION: BEHIND 
CENTER CONSOLE.

C74/ 6 WAY REAR A/C REFRIGERANT SOLENOID MODULE LOCATION: BEHIND CENTER 
CONSOLE

pin

ckt

color

description

C

59

BK

Ground G4

D

870

BR/WH

Front axle solenoid (-)

E

871

YL/WH

Front axle solenoid (+)

F

859

RD/YL

+12v fused battery voltage

G

861

BR

Rear axle solenoid (-)

H

862

YL

Rear axle solenoid (+)

Pin

ckt

color

description

A

408

WH

Solenoid ground signal

B

58

BK

Ground G4

C

399

DG

+12v ignition input

D

402

LB

Input from control head

E

399

DG

Solenoid power signal

--

--

--

12-250

Electrical System

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C75/56 WAY ECM J1 (BLUE) LOCATION: DRIVERSIDE COWL TOP UNDER ECM

PIN

CKT

COLOR

DESCRIPTION

1

211

YL

SAE J1939 CAN HI

2

212

DG

SAE J1939 CAN LO

3

620

TN

Oil pressure reference signal

4

270

GN

Transmission temperature signal

5

1037

RD

+12 Battery voltage

6

625

BR 

Coolant temperature signal

7

255

OR/BK

Baro sensor ground

8

156

PK/BK

Cam sensor ground

9

244

BK

Ground

10

242

PK

Ignition 1 Voltage

11

--

--

--

12

--

--

--

13

654

DB

MAF sensor signal

14

105

BR/WH

EGR valve position signal

15

914

PP

Class II (J1850 data link)

16

--

--

--

17

720

TN

5 volt reference

18

243

PK

+12v Ignition feed ECM 

19

242

PK

Ignition 1 voltage

20

1037

RD

Battery positive voltage

21

--

--

--

22

--

--

--

23

367

GY

5 volt reference turbo vein position sensor

24

--

--

--

_____________________________________________________

 Electrical System  12-251

25

--

--

--

26

338

DB

Wait to start indicator control

27

28

721

LB

APP sensor 2 (5 volt signal)

29

--

--

--

30

--

--

--

31

612

WH/BK

Baro pressure (5 volt signal)

32

717

TN

APP sensor 1 (5 volt signal)

33

508

TN

Fuel rail pressure sensor (5 volt signal)

34

617

GY

Engine oil pressure (5 volt signal)

35

--

--

--

36

723

YL

APP sensor 3 (5 volt signal)

37

513

YL

Fuel pressure regulator solenoid control

38

--

--

--

39

614

GY

MAP sensor (5 volt signal)

40

510

PP/WH

Fuel pressure regulator solenoid control

41

--

--

--

42

514

PK

Generator field duty cycle signal

43

--

--

--

44

--

--

--

45

--

--

--

46

353

YL

Speed Signal 

47

106

GY

EGR valve (5 volt signal)

48

--

--

--

49

--

--

--

50

254

RD

CAM sensor (5 volt signal)

51

511

YL

Fuel pressure regulator solenoid control

52

516

GY/BK

FICM relay control

53

136

BK

54

512

PP/WH

Fuel pressure regulator solenoid supply voltage

55

--

--

--

56

514

PK

Ignition voltage +12v

PIN

CKT

COLOR

DESCRIPTION