GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Chevrolet C-Series Medium Duty Truck B7 🢒 Engine 🢒 Engine Controls - 7.4L 🢒 Engine Electrical Connector End Views
Table 1: Ammeter
Table 2: Automatic Transmission (AT) Shift Selector Control
Table 3: Clutch/Starter Interlock Switch
Table 4: Ether Injector-Engine Coolant Temperature (ECT) Switch
Table 5: Ether Injector Control Valve
Table 6: Generator Regulator (Gasoline Engine)
Table 7: Generator C3 (Cat® Diesel)
Table 8: Generator Inline Fuse (CAT® Diesel and Gasoline)
Table 9: Neutral Position Switch
Table 10: Starter Relay (Flasher/Relay Center)
Table 11: Starter Thermal Switch

Ammeter


Object Number: 62456 Size: CH

Connector Part Information
    • 12064752
    • 6 Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

GRY

8

Instrument Panel Lamp Feed

B

BLK

150

Ground

C

WHT

2084

Generator Feed-Ammeter

D

GRY

2083

Starter Feed-Ammeter

E-F

--

--

Not Used

Automatic Transmission (AT) Shift Selector Control


Object Number: 62463 Size: CH

Connector Part Information
    • 12064766
    • 8 Way F Metri-Pack 150 Series (BLU)

Pin

Wire Color

Circuit No.

Function

A

GRY

8

Instrument Panel Lamp Feed

B

ORN/BLK

1786

Transmission Park/Neutral Signal

C-E

--

--

Not Used

F

PNK

39

Fuse Output-Ignition (Cat® Diesel)

G

--

--

Not Used

H

BLK

250

Ground

Clutch/Starter Interlock Switch


Object Number: 295466 Size: CH

Connector Part Information
    • 12033711
    • 2 Way F Metri-Pack 480 Series, (BLU)

Pin

Wire Color

Circuit No.

Function

A

GRY

48

Clutch Switch Signal Clutch Anticipate

B

PPL

806

Fuse Output Crank Type III Fuse

Ether Injector-Engine Coolant Temperature (ECT) Switch


Object Number: 258174 Size: CH

Connector Part Information
    • 12010973
    • 2 Way M Weather Pack (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN

37

Engine Metal Temperature Sensor Signal

B

BLK

150

Ground

Ether Injector Control Valve


Object Number: 82413 Size: CH

Connector Part Information
    • 12010973
    • 2 Way M Weather Pack Shroud Type (BLK)

Pin

Wire Color

Circuit No.

Function

A

TAN

1997

Ether Solenoid Feed

B

BLK

150

Ground

Generator Regulator (Gasoline Engine)


Object Number: 226995 Size: CH

Connector Part Information
    • 12124898
    • 4 Way F Metri-Pack Mixed, Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

F

BRN

341

Fuse Output Ignition 1 Type III Fuse

L

BRN

25

Charge Indicator Lamp Output

P

PPL

1477

Generator Output Tachometer Pulse

S

RED

842

Fuse Output Battery Type II Fuse

Generator C3 (Cat® Diesel)


Object Number: 62489 Size: CH

Connector Part Information
    • 12052315
    • 2 Way F Metri-Pack 630 Series, Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A

RED

842

Fuse Output Battery

B

BRN

25

Charge Indicator Lamp Output

Generator Inline Fuse (CAT® Diesel and Gasoline)


Object Number: 62489 Size: CH

Connector Part Information
    • 12066681
    • 2 Way F Metri-Pack 630 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

53

Fuse Output Generator Tachometer Pulse Type III Fuse

B

PPL

1477

Generator Output Tachometer Pulse

Neutral Position Switch


Object Number: 38554 Size: CH

Connector Part Information
    • 12124819
    • 2 Way F Metri-Pack 280 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

806

Fuse Output Crank Type III Fuse

B

ORN/BLK

434

Transmission Mounted Neutral Safety Switch Signal

Starter Relay (Flasher/Relay Center)


Object Number: 73243 Size: CH

Connector Part Information
    • 12160504
    • 36 Way (BLK)

Pin

Wire Color

Circuit No.

Function

A1-A9

--

--

Not Used

B1

PPL

6

Starter Solenoid Feed

B2

--

--

Not Used

B3

ORN/BLK

434

Transmission Mounted Neutral Safety Switch Signal or Clutch Starter Interlock Switch Output (LG5 Engine)

B3

PPL

806

Fuse Output- Crank -Type III Fuse (LP4/L21 Engine)

B4

--

--

Not Used

B5

BRN

323

Shift Solenoid Feed (LG5 Engine)

B6

--

--

Not Used

B7

BLK

150

Ground (LG5 Engine)

B8-B9

--

--

Not Used

C1

BLK

150

Ground (LG5 Engine)

C1

YEL

447

Starter Relay- Output -Coil (LP4/L21 Engine)

C2

--

--

Not Used

C3

RED

542

Fuse Output- Battery -Type III Fuse

C4

--

--

Not Used

C5

GRY

324

Shift Relay -Output Coil (LG5 Engine)

C6

--

--

Not Used

C7

PNK

639

Fuse Output- Ignition 1-Type III Fuse (LG5 Engine)

C8-C9

--

--

Not Used

D1-D9

--

--

Not Used

Starter Thermal Switch


Object Number: 62426 Size: CH

Connector Part Information
    • 12040753
    • 2 Way F Metri-Pack 150 Series Pull To Seat (BLK)

Pin

Wire Color

Circuit No.

Function

A

ORN/BLK

434

Transmission Mounted Neutral Safety Switch Signal

B

ORN/BLK

434

Transmission Mounted Neutral Safety Switch Signal