Hummer H1 (2006+). Manual — part 382

12-204

Electrical System

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CONNECTOR LEGEND

C1/ 102 WAY BULKHEAD LOCATION: LEFT SIDE FIREWALL

pin

ckt

Color

circuit description

1

739

PP

Left heated windshield power +

2

740

YL

Right heated windshield power +

3

16

LG

Ignition relay signal +

4

20

RD

Left rear turn signal

5

12

OR

Head lamp high beam feed

6

13

TN

Head lamp low beam feed

7

33

WH

neutral safety switch feed

8

962

BR

Trailer lights

9

603

RD

ABS lamp activation

10

961

PP

TT4 lamp activation

11

606

OR

ABS diagnostic line

12

1

DB

Horn relay activation

13

42

BR

Low brake fluid lamp activation

14

640

OR

IGN+ CTIS warning circuits

15

327

YL

Water-in-fuel lamp activation

16

428

PK

CTIS buzzer activation

17

41

TN

Brake fluid level sensor feed

18

17

PP

Illumination circuit (+)

19

92

GY

CTIS rear inflate solenoid activation

20

607

TN

ABS module diagnostic line

21

47

LG

Deflate solenoid activation

22

767

BR

Compass mirror temperature signal

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Electrical System 12-205

23

91

TN

CTIS front inflate solenoid activation

24

2

LG

Right front turn signal

25

140

OR

Reverse signal

26

3

LB

Left front turn signal

27

21

GY

Rear tail lamp feed

28

298

BR

Backup light switch feed

29

5

DG

Right rear turn signal

30

9

YL

Backup light activation

31

400

LG

Ignition +12v

32

151

GY

Cruise control ON/OFF signal

33

784

DB

T-case range switch input to the ECM (-)

34

809

TN

Brake light input for the ECM

35

242

PK

Ignition 1 Voltage

36

714

DB

Check throttle lamp activation

37

724

DG

APP sensor 3 signal

38

723

YL

APP sensor 3 (5 volt signal)

39

270

DG

Transmission temperature signal

40

520

WH

Brake lamp switch

41

644

YL

Tachometer signal

42

232

___

Shield

43

--

--

--

44

861

BR

Rear Elocker activation signal (-)

45

862

YL

Rear Elocker activation signal (+)

46

212

DG

SAE J1939 CAN LO

47

211

YL

SAE J1939 CAN HI

48

37

YL

Batt feed to interior fuse box

49

--

--

--

50

1072

BK

Shift interlock cable

51

--

--

--

52

870

BR/WH

Front Elocker activation signal (-)

53

871

YL/BK

Front Elocker activation signal (+)

54

37

YL

Ignition relay feed

55

37

YL

Battery feed to interior accessories

56

667

PP

Over drive disable switch light activation (ground)

57

666

YL

Over drive disable request

58

665

DG

Tow haul switch light activation (ground)

59

664

LG

Tow Haul switch request

60

--

--

--

61

--

--

--

62

722

PP

Accelerator pedal position sensor 2 (+)

63

80

WH

Underhood lamp power

pin

ckt

Color

circuit description

12-206

Electrical System

______________________________________________________

64

904

OR/BK

Alternator signal to instrument panel

65

941

TN

Lower windshield washer pump activation

66

580

BR

Fused battery input to the heated mirror.

67

136

BK

Vehicle speed sensor

68

353

YL

Speedometer signal (+)

69

46

WH

CTIS compressor relay activation

70

--

--

--

71

718

DB

Accelerator pedal position sensor 1 signal (PWM)

72

520

WH

Brake lamp switch

73

717

TN

APP sensor 1 (5 volt signal)

74

338

DB

Wait lamp activation

75

720

TN

Accelerator pedal position sensor 1 (+)

76

198

TN

A/C request

77

663

PK

Range limited circuit

78

662

WH

High trans temp signal

79

38

RD

Head lamp switch feed

80

914

PP

Class II (J1850 data link)

81

658

BR

Check engine lamp activation

82

721

LB

Accelerator pedal position sensor 2 signal (PWM)

83

29

PK

Fuel gauge signal

84

786

RD

Fuel selector valve control

85

625

BR

Coolant temperature signal

86

620

TN

Oil pressure reference signal

87

793

YL

Low air warning lamp activation

88

794

RD

Low coolant lamp activation

89

789

BR

Fuel selector valve control

90

210

DG

Transfer case lock lamp activation

91

725

GY

APP 3

92

719

BR

Accelerator pedal position sensor 1 (-)

93

152

DB

Cruise set/coast signal

94

153

LG

Cruise resume/accelerate signal

95

43

DB

Trailer Brake activation

96

195

YL

Headlight switch feed

97

--

--

--

98

575

OR

ABS valve relay (+)

99

37

YL

start relay feed

100

37

YL

Ignition switch feed

101

688

RD

Rear window defrost feed

102

175

LB

Power window relay feed

pin

ckt

Color

circuit description

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Electrical System 12-207

C2/42 WAY UNDERBODY LOCATION: LOWER LEFT FOOT WELL NEAR ENGINE

PIN

CKT

COLOR

DESCRIPTION

1

43

DB

Trailer brake activation

2

20

RD

Front parking lamp feed

3

12

OR

Head lamp high beam feed

4

13

TN

Head lamp low beam feed

5

3

LB

Left front turn signal

6

80

WH

Underwood lamp power

7

2

LG

Right front turn signal

8

767

BR

Compass mirror temperature signal

9

49

OR

Battery power to trailer connector

10

996

BR

Left front wheel speed sensor low signal

11

997

BK

Left front wheel speed sensor high signal

12

32

LB

Neutral safety switch feed to start relay

13

520

WH

Shift interlock solenoid

14

17

PP

Light power from dimmer module

15

861

BR

Rear axle solenoid (-)

16

862

YL

Rear axle solenoid (+)

17

870

BR/WH

Front axle solenoid (-)

MALE

PIN 34

PIN 28

PIN 22

PIN 16

PIN 10

PIN 1

PIN 42

PIN 33

PIN 27

PIN 21

PIN 15

PIN 9

FEMALE

CAV 42

CAV 33

CAV 27

CAV 21

CAV 15

CAV 9

CAV 34

CAV 28

CAV 22

CAV 16

CAV 10

CAV 1