Hummer H1 (2006+). Manual — part 395

12-256

Electrical System

______________________________________________________

C78/ 32 WAY TCM (GRAY) LOCATION: DRIVERSIDE COWL ON TOP OF TCM

PIN

CKT

COLOR

DESCRIPTION

1

244

BK

Ground

2

243

PK

+12v Ignition input

3

1037

RD

+12v Battery input

4

243

PK

+12v Ignition input

5

244

BK

Ground

6

--

--

--

7

520

WH

TCC brake switch/cruise control release signal

8

--

--

--

9

784

DB

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

10

664

LG

Tow Haul switch request

11

--

--

--

12

666

YL

Over drive disable request

13

1012

PK

ABS activation signal (disables TCC during ABS activation)

14

--

--

--

15

--

--

--

16

--

--

--

17

--

--

--

18

--

--

--

19

665

DG

Tow haul switch light activation (ground)

20

667

PP

Over drive disable switch light activation (ground)

21

--

--

--

22

--

--

--

23

663

PK

Range limited circuit

24

662

WH

High trans temp signal

25

661

GN

Transmission control module MIL request signal

26

--

--

--

_____________________________________________________

Electrical System 12-257

27

--

--

--

28

244

BK

Ground

29

211

YL

SAE J1939 CAN HI

30

914

PP

Class II (J1850 data link)

31

232

---

Shield

32

212

DG

SAE J1939 CAN LO

PIN

CKT

COLOR

DESCRIPTION

12-258

Electrical System

______________________________________________________

C79/ 32 WAY TCM (RED) LOCATION: DRIVERSIDE COWL ON TOP OF TCM

PIN

CKT

COLOR

DESCRIPTION

1

769

DB

Fluid pressure switch signal C

2

770

PK

Fluid pressure switch signal D

3

771

WH

Fluid pressure switch signal E

4

772

DG

Fluid pressure switch reverse signal

5

591

DB

Transmission range switch signal A

6

590

YL

Transmission range switch signal B

7

592

GY

Transmission range switch signal C

8

593

WH

Transmission range switch signal P

9

--

--

--

10

923

TN

TFT sensor signal

11

--

--

--

12

--

--

--

13

493

OR

Transmission Turban speed switch signal

14

494

DB

Transmission turbine speed switch low reference

15

1000

WH

Vehicle speed sensor high

16

1001

LB

Transmission OSS Low

17

495

TN

AT ISS High signal

18

496

OR

AT ISS low signal

19

--

--

--

20

594

DG

Ground

21

272

YL

Trans ID

22

773

YL

PPC solenoid A valve high control

23

774

WH

PPC solenoid A valve low control

24

775

PK

PPC solenoid B valve high control

25

776

OR

PPC solenoid B valve low control

26

777

DG

Shift solenoid C valve control

_____________________________________________________

Electrical System 12-259

C80/ 14 WAY ENGINE POWER HARNESS LOCATION: ON TOP OF ENGINE

27

778

DB

Shift solenoid D valve control

28

779

GY

Shift solenoid E valve control

29

780

WH

TCC PWM solenoid valve control

30

781

DB

Modulated main pressure

31

782

TN

+12 volt reference

32

783

DG

TCC PWM solenoid supply voltage

PIN

CKT

COLOR

DESCRIPTION

A

--

--

--

B

198

TN

A/C request

C

290

PK

Alternator field wire

D

1251

BK

Ground circuit to MAF (ECM supplied)

E

439

YL

A\C request

F

654

DB

MAF sensor

G

904

OR/BK

Alternator signal to instrument panel

H

348

BR

AC compressor signal

J

1250

BK

Intake air temperature sensor

K

653

YL

Intake air temperature signal

L

794

RD

Low coolant lamp activation

M

239

PK

Engine ignition feed

N

34

LB

Starter solenoid signal

P

34

LB

Starter solenoid signal

PIN

CKT

COLOR

DESCRIPTION

H

A

G

P