GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2004 🢒 CTS 🢒 Accessories 🢒 Navigation Systems 🢒 Entertainment Connector End Views
Table 1: Audio Amplifier C1 (U66)
Table 2: Audio Amplifier C2 (U66)
Table 3: Audio Amplifier C3 (U66)
Table 4: Audio Amplifier C1 (U57)
Table 5: Audio Amplifier C2 (U57)
Table 6: Audio Amplifier C3 (U57)
Table 7: Digital Radio Receiver (U2K/U2L)
Table 8: Noise Compensation Microphone (U57)
Table 9: Radio C1
Table 10: Radio C2
Table 11: Radio C3
Table 12: Radio C4 (Export w/U2X/U2Y)
Table 13: Radio Antenna Module
Table 14: Speaker - Front Center (U57)
Table 15: Speaker - Left A Pillar Tweeter (U57)
Table 16: Speaker - Left A Pillar Tweeter (U66)
Table 17: Speaker - Right A Pillar Tweeter (U57)
Table 18: Speaker - Right A Pillar Tweeter (U66)
Table 19: Speaker - LF Door (U57)
Table 20: Speaker - LF Door (U66)
Table 21: Speaker - RF Door (U57)
Table 22: Speaker - RF Door (U66)
Table 23: Speaker - LR Door
Table 24: Speaker - RR Door
Table 25: Speaker - Rear Subwoofer (U57)
Table 26: Speaker - Rear Subwoofer (U66)
Table 27: Steering Wheel Controls - Left (LY9/LA3/LY7)
Table 28: Steering Wheel Controls - Left (LS6)
Table 29: Steering Wheel Controls - Right (LY9/LA3/LY7)
Table 30: Steering Wheel Controls - Right (LS6)

Audio Amplifier C1 (U66)


Object Number: 35456 Size: CH

Connector Part Information
    • 12064749
    • 2-Way F Metri-Pack 480 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

BK/WH

851

Ground

B

RD/BK

1242

Battery Positive Voltage

Audio Amplifier C2 (U66)


Object Number: 73152 Size: CH

Connector Part Information
    • 12084945
    • 16-Way F Micro-Pack 100 Series (GY)

Pin

Wire Color

Circuit No.

Function

A1-A2

--

--

Not Used

A3

D-GN

1953

Right Front Midrange Speaker Output (-)

A4

OG

1853

Right Front Midrange Speaker Output (+)

A5

OG

1955

Right Rear Midrange Speaker Output (-)

A6

TN

1855

Right Rear Midrange Speaker Output (+)

A7

WH

1959

Left Rear Midrange Speaker Output (-)

A8

TN

1859

Left Rear Midrange Speaker Output (+)

B1

D-BU

658

Cellular Telephone Voice Signal (UE1)

B2

L-BU/BK

659

Cellular Telephone Voice Low Reference (UE1)

B3-B8

--

--

Not Used

Audio Amplifier C3 (U66)


Object Number: 130690 Size: CH

Connector Part Information
    • 12110206
    • 24-Way F Micro-Pack 100 Series (L-BU)

Pin

Wire Color

Circuit No.

Function

A1

PU

1952

Right Front Tweeter Speaker Output (-)

A2

L-GN

1852

Right Front Tweeter Speaker Output (+)

A3

TN

1856

Left Front Tweeter Speaker Output (+)

A4

YE

1956

Left Front Tweeter Speaker Output (-)

A5

D-BU

1857

Left Front Midrange Speaker Output (+)

A6

L-BU

1957

Left Front Midrange Speaker Output (-)

A7

D-BU/WH

346

Rear Subwoofer Speaker Coil 1 Output (+)

A8

L-GN/BK

1794

Rear Subwoofer Speaker Coil 1 Output (-)

A9

D-GN

1795

Rear Subwoofer Speaker Coil 2 Output (+)

A10

L-BU/BK

315

Rear Subwoofer Speaker Coil 2 Output (-)

A11-A12

--

--

Not Used

B1-B3

--

--

Not Used

B4

L-GN

1948

Right Low Level Audio Signal (-)

B5

L-GN

512

Right Low Level Audio Signal (+)

B6

D-GN

1947

Left Low Level Audio Signal (-)

B7

TN

511

Left Low Level Audio Signal (+)

B8-B10

--

--

Not Used

B11

PU

1807

Class 2 Serial Data

B12

--

--

Not Used

Audio Amplifier C1 (U57)


Object Number: 73158 Size: CH

Connector Part Information
    • 12110626
    • 8-Way F Metri-Pack 280 Series, Flexlock (GY)

Pin

Wire Color

Circuit No.

Function

A

BK/WH

851

Ground

B

D-BU/WH

346

Rear Subwoofer Speaker Output (+)

C-F

--

--

Not Used

G

L-GN/BK

1794

Rear Subwoofer Speaker Output (-)

H

RD/BK

1242

Battery Positive Voltage

Audio Amplifier C2 (U57)


Object Number: 130690 Size: CH

Connector Part Information
    • 12110206
    • 24-Way F Micro-Pack 100 Series (L-BU)

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

WH

1959

Left Rear Midrange Speaker Output (-)

A3

TN

1859

Left Rear Midrange Speaker Output (+)

A4

TN

1856

Left Front Tweeter Speaker Output (+)

A5

YE

1956

Left Front Tweeter Speaker Output (-)

A6

L-BU

1960

Front Center Speaker Output (-)

A7

YE

1860

Front Center Speaker Output (+)

A8

PU

1952

Right Front Tweeter Speaker Output (-)

A9

L-GN

1852

Right Front Tweeter Speaker Output (+)

A10

TN

1855

Right Rear Midrange Speaker Output (+)

A11

OR

1955

Right Rear Midrange Speaker Output (-)

A12

L-BU/BK

659

Cellular Telephone Voice Low Reference (UE1)

B1-B7

--

--

Not Used

B8

L-GN

1948

Right Low Level Audio Signal (-)

B9

D-GN

1947

Left Low Level Audio Signal (-)

B10

TN

511

Left Low Level Audio Signal (+)

B11

L-GN

512

Right Low Level Audio Signal (+)

B12

D-BU

658

Cellular Telephone Voice Signal (UE1)

Audio Amplifier C3 (U57)


Object Number: 280764 Size: CH

Connector Part Information
    • 12064993
    • 6-Way F Micro-Pack 100 Series (BK)

Pin

Wire Color

Circuit No.

Function

5

--

--

Not Used

6

PU

1807

Class 2 Serial Data

7

BARE

1489

Drain Wire

8

D-GN

1488

Noise Compensation Microphone Supply Voltage

9

WH

5343

Navigation Audio Signal (-) (UAV/U2X/U2Y)

10

YE

5342

Navigation Audio Signal (+) (UAV/U2X/U2Y)

Digital Radio Receiver (U2K/U2L)


Object Number: 850856 Size: CH

Connector Part Information
    • 15394150
    • 16-Way F Micro 64 (BK)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

D-GN/WH

368

Right Audio Signal (+)

3

BN/WH

367

Left Audio Signal (+)

4-8

--

--

Not Used

9

BK

850

Ground

10

TN/WH

372

Audio Common

11-14

--

--

Not USed

15

PU

1807

Class 2 Serial Data

16

RD/WH

2240

Battery Positive Voltage

Noise Compensation Microphone (U57)


Object Number: 35441 Size: CH

Connector Part Information
    • 12047663
    • 2-Way M Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

BARE

1489

Drain Wire

B

D-GN

1488

Noise Compensation Microphone Supply Voltage

Radio C1


Object Number: 815047 Size: CH

Connector Part Information
    • 30220700
    • 20-Way F DCS-2 Tri-Color (YE/GN/BU)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

BARE

5344

Drain Wire (UAV/U2X/U2Y)

3

--

--

Not Used

4

YE

5342

Navigation Audio Signal (+) (UAV/U2X/U2Y)

5

OG

1544

Information Up Switch Signal (LY9/LA3/LY7)

6

PK

5149

Cellular Microphone Signal (UAV)

GY

655

Cellular Microphone Signal (U2Y/U2X)

7

--

--

Not Used

8

PU

1807

Class 2 Serial Data

9

PK/BK

5152

Cellular Microphone Low Reference (UAV)

BARE

1782

Drain Wire (U2Y/U2X)

10

--

--

Not Used

11

PU

1807

Class 2 Serial Data

12

PK

1545

Information Down Switch Signal (LY9/LA3/LY7)

13

D-BU

1796

Steering Wheel Controls Signal (LY9/LA3/LY7)

14

D-GN

5142

Modem Tx (UAV)

15

--

--

Not Used

16

WH

5343

Navigation Audio Signal (-) (UAV/U2X/U2Y)

17

L-BU

5141

Modem Rx (UAV)

18

--

--

Not Used

19

OG

1486

FM Composite Signal

20

YE/BK

5143

Modem Ground (UAV) (Not Used)

Radio C2


Object Number: 895622 Size: CH

Connector Part Information
    • 963121-1
    • 8-Way F Junior Timer Type (TN)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

BARE

2012

Drain Wire

3

L-GN

512

Right Low Level Audio Signal (+)

4

L-GN

1948

Right Low Level Audio Signal (-)

5

TN

511

Left Low Level Audio Signal (+)

6

D-GN

1947

Left Low Level Audio Signal (-)

7

BN

818

Vehicle Speed Signal (UAV/U2X/U2Y)

8

BARE

2011

Drain Wire

Radio C3


Object Number: 895623 Size: CH

Connector Part Information
    • 963120-1
    • 8-Way F Junior Timer Type (GY)

Pin

Wire Color

Circuit No.

Function

1

D-GN/WH

368

Right Audio Signal (+) (U2K/U2L)

2

PU

1375

Remote Radio Control Supply Voltage (LY9/LA3/LY7)

3

TN/WH

372

Audio Common (U2K/U2L)

4

BN/WH

367

Left Audio Signal (+) (U2K/U2L)

5

PK

5165

SW Antenna Enable (Export w/U2X)

6

BARE

5324

Drain Wire (U2K/U2L)

7

RD/WH

2240

Battery Positive Voltage

8

BK/WH

851

Ground

Radio C4 (Export w/U2X/U2Y)


Object Number: 815050 Size: CH

Connector Part Information
    • 39-01-2295
    • 22-Way F Mini-Fit Jr. (WH)

Pin

Wire Color

Circuit No.

Function

1-5

--

--

Not Used

6

OR

2047

Video Red Signal (+)

7

TN

5146

Video Red Signal (-)

8

D-BU

2048

Video Green Signal (+)

9

BN

5145

Video Green Signal (-)

10

D-GN

2049

Video Blue Signal (+)

11

GY

5144

Video Blue Signal (-)

12-14

--

--

Not Used

15

BN

2355

Navigation Display Serial Data Low (Japan w/U2X)

16

OG

2354

Navigation Display Serial Data High (Japan w/U2X)

17-19

--

--

Not Used

20

L-GN

2045

Video Synchronization Signal (+)

21

TN/BK

5147

Video Synchronization Signal (-)

22

--

--

Not Used

Radio Antenna Module


Object Number: 890598 Size: CH

Connector Part Information
    • 12186246
    • 3-Way F Micro-Pack (WH)

Pin

Wire Color

Circuit No.

Function

1

RD/WH

3640

Battery Positive Voltage

2

OG

1486

FM Composite Signal

3

PU

1807

Class 2 Serial Data

Speaker - Front Center (U57)


Object Number: 82383 Size: CH

Connector Part Information
    • 12047662
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

L-BU

1960

Front Center Speaker Output (-)

B

YE

1860

Front Center Speaker Output (+)

Speaker - Left A Pillar Tweeter (U57)


Object Number: 82383 Size: CH

Connector Part Information
    • 12047662
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

YE

1956

Left Front Tweeter Speaker Output (-)

B

TN

1856

Left Front Tweeter Speaker Output (+)

Speaker - Left A Pillar Tweeter (U66)


Object Number: 280768 Size: CH

Connector Part Information
    • 12052832
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

YE

1956

Left Front Tweeter Speaker Output (-)

B

TN

1856

Left Front Tweeter Speaker Output (+)

Speaker - Right A Pillar Tweeter (U57)


Object Number: 82383 Size: CH

Connector Part Information
    • 12047662
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

PU

1952

Right Front Tweeter Speaker Output (-)

B

L-GN

1852

Right Front Tweeter Speaker Output (+)

Speaker - Right A Pillar Tweeter (U66)


Object Number: 280768 Size: CH

Connector Part Information
    • 12052832
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

PU

1952

Right Front Tweeter Speaker Output (-)

B

L-GN

1852

Right Front Tweeter Speaker Output (+)

Speaker - LF Door (U57)


Object Number: 280768 Size: CH

Connector Part Information
    • 12052832
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

YE

1956

Left Front Tweeter Speaker Output (+)

B

TN

1856

Left Front Tweeter Speaker Output (+)

Speaker - LF Door (U66)


Object Number: 130687 Size: CH

Connector Part Information
    • 12064867
    • 2-Way F Metri-Pack 150 Series (WH)

Pin

Wire Color

Circuit No.

Function

A

L-BU

1957

Left Front Midrange Speaker Output (-)

B

D-BU

1857

Left Front Midrange Speaker Output (+)

Speaker - RF Door (U57)


Object Number: 280768 Size: CH

Connector Part Information
    • 12052832
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

PU

1952

Right Front Tweeter Speaker Output (-)

B

L-GN

1852

Right Front Tweeter Speaker Output (+)

Speaker - RF Door (U66)


Object Number: 130687 Size: CH

Connector Part Information
    • 12064867
    • 2-Way F Metri-Pack 150 Series (WH)

Pin

Wire Color

Circuit No.

Function

A

D-GN

1953

Right Front Midrange Speaker Output (-)

B

OG

1853

Right Front Midrange Speaker Output (+)

Speaker - LR Door


Object Number: 280768 Size: CH

Connector Part Information
    • 12052832
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

WH

1959

Left Rear Midrange Speaker Output (-)

B

TN

1859

Left Rear Midrange Speaker Output (+)

Speaker - RR Door


Object Number: 280768 Size: CH

Connector Part Information
    • 12052832
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

OG

1955

Right Rear Midrange Speaker Output (-)

B

TN

1855

Right Rear Midrange Speaker Output (+)

Speaker - Rear Subwoofer (U57)


Object Number: 39667 Size: CH

Connector Part Information
    • 12129136
    • 4-Way F Metri-Pack 280 Series Flexlock (BK)

Pin

Wire Color

Circuit No.

Function

A

D-BU/WH

346

Rear Subwoofer Speaker Output (+)

B

L-GN/BK

1794

Rear Subwoofer Speaker Output (-)

C-D

--

--

Not Used

Speaker - Rear Subwoofer (U66)


Object Number: 130637 Size: CH

Connector Part Information
    • 12064760
    • 4-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

L-GN/BK

1794

Rear Subwoofer Speaker Coil 1 Output (-)

B

D-BU/WH

346

Rear Subwoofer Speaker Coil 1 Output (+)

C

L-BU/BK

315

Rear Subwoofer Speaker Coil 2 Output (-)

D

D-GN

1795

Rear Subwoofer Speaker Coil 2 Output (+)

Steering Wheel Controls - Left (LY9/LA3/LY7)


Object Number: 605502 Size: CH

Connector Part Information
    • 50-57-9404
    • 4-Way F Molex (BK)

Pin

Wire Color

Circuit No.

Function

1

D-BU

1375

Remote Radio Control Supply Voltage

2

D-BU

1796

Steering Wheel Controls Signal

3

YE

1491

Backlight Lamps Control

4

BK

350

Ground

Steering Wheel Controls - Left (LS6)


Object Number: 605502 Size: CH

Connector Part Information
    • 50-57-9404
    • 4-Way F Molex (BK)

Pin

Wire Color

Circuit No.

Function

1

BK

351

Ground

2

BK

350

Ground

3

YE

1491

Backlight Lamps Control

4

D-BU

5201

Steering Wheel Controls Signal

Steering Wheel Controls - Right (LY9/LA3/LY7)


Object Number: 1333392 Size: CH

Connector Part Information
    • 50-57-9407
    • 7-Way F Molex (BK)

Pin

Wire Color

Circuit No.

Function

1

YE

1491

Backlight Lamps Control

2

BK

350

Ground

3

OG

1544

Information Up Switch Signal

4

PK

1545

Information Down Switch Signal

5

PU

1375

Remote Radio Control Supply Voltage

6

D-BU

1375

Remote Radio Control Supply Voltage

7

D-BU

1796

Steering Wheel Controls Signal

Steering Wheel Controls - Right (LS6)


Object Number: 1333392 Size: CH

Connector Part Information
    • 50-57-9407
    • 7-Way F Molex (BK)

Pin

Wire Color

Circuit No.

Function

1

PK

339

Ignition 1 Voltage

2

GY/WH

87

Cruise Control Resume/Accel Switch Signal

3

D-BU

84

Cruise Control Set/Coast Switch Signal

4

GY

397

Cruise Control On Switch Signal

5

BK

350

Ground

6

YE

1491

Backlight Lamps Control

7

--

--

Not Used