GM Service Manual Online
For 1990-2009 cars only
Table 1: Cooling Fan 1
Table 2: Cooling Fan 2
Table 3: Engine Coolant Temperature (ECT) Sensor
Table 4: Cooling Fan Control Module - C1
Table 5: Cooling Fan Control Module - C2
Table 6: Coolant Level Switch

Cooling Fan 1


Object Number: 668833  Size: CH

Connector Part Information

    • 12124686
    • 3-Way M Metri-Pack 630 Series Sealed (BK)

Pin

Wire Color

Circuit No.

Function

A

WH

504

Cooling Fan Low Reference

B

GY

535

Medium Speed Cooling Fan Motor Supply Voltage

C

L-BU

409

Cooling Fan Motor Supply Voltage

Cooling Fan 2


Object Number: 668832  Size: CH

Connector Part Information

    • 12124685
    • 3-Way F Metri-Pack 630 Series Sealed (BK)

Pin

Wire Color

Circuit No.

Function

A

BK

150

Ground

B

OG

521

Medium Speed Cooling Fan Motor Supply Voltage

C

OG

532

Cooling Fan Motor Supply Voltage

Engine Coolant Temperature (ECT) Sensor


Object Number: 1283861  Size: CH

Connector Part Information

    • 12186308
    • 2-Way F Junior Power Timer Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

YE

410

ECT Sensor Signal

2

PU/WH

652

Low Reference

Cooling Fan Control Module - C1


Object Number: 1341469  Size: CH

Connector Part Information

    • 15305039
    • 6-Way F 101 Metri-Pack 280 Series Sealed (BN)

Pin

Wire Color

Circuit No.

Function

A

BK

150

Ground

B

OG

532

Cooling Fan Motor Supply Voltage

C

--

--

Not Used

D

PU

202

Battery Positive Voltage

E

OG

521

Medium Speed Cooling Fan Motor Supply Voltage

F

--

--

Not Used

Cooling Fan Control Module - C2


Object Number: 1341467  Size: CH

Connector Part Information

    • 15305041
    • 6-Way F 102 Metri-Pack 280 Series Sealed (BN)

Pin

Wire Color

Circuit No.

Function

A

GY

535

Medium Speed Cooling Fan Motor Supply Voltage

B

RD

1202

Battery Positive Voltage

C

D-BU

473

High Speed Cooling Fan Signal

D

L-BU

409

Cooling Fan Motor Supply Voltage

E

WH

504

Cooling Fan Low Reference

F

D-GN

335

Low Speed Cooling Fan Signal

Coolant Level Switch


Object Number: 1243632  Size: CH

Connector Part Information

    • 15336195
    • 2-Way F GT 150 Series Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

L-GN

1478

Coolant Level Switch Signal

2

PK

39

Ignition 1 Voltage