Hummer H1 (2006+). Manual — part 390

12-236

Electrical System

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C54/ 16 WAY TRANS TEMP/OIL MODULE LOCATION: LEFT SIDE OF INSTRUMENT PANEL

pin

ckt

color

description

1.

904

OR/BK

Low battery signal

2.

658

BR

Check engine signal

3.

620

TN

Oil pressure gauge signal

4.

793

YL

Low washer fluid signal

5.

210

DG

TC lock signal

6.

714

DB

Check throttle signal

7.

327

YL

Drain filter signal

8.

662

WH

High trans temp signal (LED)

9.

910

RD

“Bulb Check” input signal from the speedo/tach module

10.

911

GY/BK

“Bulb Check” output signal to the coolant/fuel module

11.

270

DG

Transmission temp signal (gauge)

12.

17

PP

Gauge illumination voltage

13.

913

WH

Battery voltage input for module

14.

663

PK

Range limited signal

15.

--

--

--

16.

59

BK

Ground G4

1

16

9

8

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Electrical System 12-237

C55/ 16 WAY COOLANT/FUEL MODULE LOCATION: RT. SIDE OF INSTRUMENT PANEL

pin

ckt

color

description

1.

603

RD

ABS warning light signal

2.

42

BR

Brake warning light signal

3.

625

BR

Coolant temperature signal from ECM

4.

17

PP

Gauge illumination voltage

5.

29

PK

Fuel level reference signal for the gauge

6.

794

RD

Low coolant warning light signal

7.

911

GY/BK

“Bulb Check” input signal from the volt/oil module

8.

961

PP

TT4 indictor light signal

9.

912

DB

“Bulb Check” output signal to the CTIS module

10.

878

LG/BK

Front ELocker time out light signal

11.

879

WH/BK

ELocker warning light signal

12.

915

LB

+10 volt supply to the CTIS module

13.

916

TN

Battery voltage input for the module

14.

59

BK

Ground G4

15.

--

--

--

16.

--

--

--

1

16

9

8

12-238

Electrical System

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C56/ 24 WAY RADIO HARNESS LOCATION: BACK OF THE RADIO

Pin

CKT

Colors

Description

A1

914

PP

Class 2 data link

A2

--

--

--

A3

842

OR

Rear seat audio enable

A4

--

--

--

A5

--

--

--

A6

--

--

--

A7

--

--

--

A8

804

DG

Left front speaker signal (Positive)

A9

813

GY

Left front speaker signal (Negative)

A10

819

BR

Right rear speaker signal (Negative)

A11

818

YL

Right rear speaker signal (Positive)

A12

59

BK

Ground G4

B1

476

GY

Fused radio memory feed (Battery)

B2

137

RD

Fused battery input to the radio (Ignition)

B3

--

--

--

B4

17

PP

Dimmer circuit

B5

--

--

--

B6

830

PK

Amplifier sense

B7

843

GY

Rear sear audio control

B8

820

TN

Left rear speaker signal (Positive)

B9

821

LB

Left rear speaker signal (Negative)

B10

811

PP

Right front speaker signal (Negative)

B11

805

WH

Right front speaker signal (Positive)

B12

14

LB

Radio illumination

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Electrical System 12-239

C57/ 4 WAY SUB WOOFER CONNECTOR

C58/ 12 WAY RADIO JUMPER CONNECTOR LOCATION: BACK OF THE RADIO

PIN

CKT

COLOR

DESCRIPTION

A

827

PK/OR

Front Sub Woofer +

B

826

GY/OR

Front Sub Woofer -

C

825

PK/LB

Rear Sub +

D

824

GY/LB

Rear Sub -

pin

ckt

color

description

A

844

PP

Aux Mono Enable

B

--

--

--

C

850

GY

Shield

D

--

--

--

E

--

--

--

F

--

--

--

G

851

BR

Class 2 data buss

H

848

RD

Audio common

J

847

WH

Left audio signal

K

849

BK

Right audio signal

L

846

OR

Aux mono +

M

845

TN

Aux mono -