GM Service Manual Online
For 1990-2009 cars only
Table 1: Electronic Climate Control (ECC) Module (w/ Auto A/C)
Table 2: Heater and A/C Controller Connector C5 (w/ Manual A/C)
Table 3: Inside Rear View Mirror Connector (Automatic Day/Night Mirror)

Electronic Climate Control (ECC) Module (w/ Auto A/C)


Object Number: 73157  Size: CH

Connector Part Information

    • 12045575
    • 32-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

C1

LT BLU/BLK

590

Solar Sensor Signal - Drive

C2

BRN

404

Fuse Output - Battery

C3

LT GRN

405

Fuse Output - Battery

C4

LT BLU

733

Air Temperature Valve Position Sensor Signal

C5

--

--

Not Used

C6

BRN

341

Fuse Output - Ignition

C7

GRY

1220

Fuse Output - Instrument Panel Lamps

C8

--

--

Not Used

C9

DK BLU

1199

Air Temperature Valve Motor Feed

C10

BLK

1050

Ground

C11

WHT

1038

Serial Data Signal - Class - 10400

C12

ORN

340

Fuse Output - Battery

C13

LT BLU

706

Mode Valve Solenoid Output - Recirculation

C14

TAN

363

Mode Valve Solenoid Output - Upper

C15

PPL

361

Mode Valve Solenoid Output - Defrost

C16

PPL/WHT

760

Blower Speed Signal - Speed Control - Low Energy

D1

DK GRN

734

Inside Temperature Sensor Signal

D2

DK GRN/WHT

636

Outside Ambient Temperature Sensor Signal

D3-D4

--

--

Not Used

D5

LT BLU/BLK

1688

Reference Voltages Feed - 5 Volt References

D6-D7

--

--

Not Used

D8

LT BLU

203

Air Conditioning Refrigerant High Pressure Cut - Out Switch Feed

D9

BLK

552

Sensor Returns

D10

YEL

1791

Air Temperature Valve Motor Return

D11-D13

--

--

Not Used

D14

WHT

193

Rear Defogger Relay Output - Coil

D15

LT GRN/BLK

366

Mode Valve Solenoid Output - Lower

D16

RED

362

Mode Valve Solenoid Output - Panel Vents

Heater and A/C Controller Connector C5 (w/ Manual A/C)


Object Number: 73210  Size: CH

Connector Part Information

    • 12059162
    • 4-Way F Micro-Pack 100 Series (BLU)

Pin

Wire Color

Circuit No.

Function

1

GRY

1220

Fuse Output - Instrument Panel Lamps

2

BRN

341

Fuse Output - Ignition

3

WHT

193

Fuse Output - Ignition

4

BLK

1050

Ground

Inside Rear View Mirror Connector (Automatic Day/Night Mirror)


Object Number: 153632  Size: CH

Connector Part Information

    • 12124782
    • 4 Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

1

BRN

341

Fuse Output - Ignition 3 - Type III Fuse

2

BLK

1850

Ground

3

LT GRN

1324

Fuse Output - Backup Lamps - Type III Fuse

4

GRA

1690

Automatic Day/Night Mirror Signal - Outside

5

PNK

1691

Automatic Day/Night Mirror Return - Outside

6

WHT

156

Courtesy Lamp Output (w/Dual Reading Lamps Only)

7

ORN

1732

Electronic Control Unit Output - 12 Volt(w/Dual Reading Lamps Only)