GM Service Manual Online
For 1990-2009 cars only
Figure 1:

IP Wiring Harness Junction Block, Front View


Object Number: 264262  Size: MF
(1)Multifunction Alarm Module
(2)Hazard/Turn Signal Flasher
(3)Daytime Running Lamps (DRL) Relay
(4)Park Brake Pull Button Switch Relay
Figure 2:

Fuse Block, Front View


Object Number: 277442  Size: MF

Fuse/Circuit Breaker

Rating

Description

STOP/HAZ Fuse 1

20A

Multifunction Alarm Module, Turn Signal Switch, and the Stoplamps Switch

TAC Fuse 2

15A

Throttle Actuator Control (TAC) Module

CTSY Fuse 3

20A

Provision for Body Builder (Courtesy/Dome Lamp)

GAUGES Fuse 4

10A

IP Cluster, Speedometer Adapter Module, Daytime Running Lamps Control (DRL) Module, DRL Relay, and the Multifunction Alarm Module

LH TAIL Fuse 5

5A

LH Tail and Marker Lamps

CRUISE Fuse 6

10A

Cruise Control Switch

AUX PWR Fuse 7

20A

Provisions for Body Builder (Aux Pwr Feed)

CRANK Fuse 8

5A

Crank Request to Powertrain Control Module

PK LPS Fuse 9

20A

Headlamps Switch

TURN-B/U Fuse 10

15A

Backup Lamps Switch and Turn Signal Switch

RH TAIL Fuse 11

5A

RH Tail and Marker Lamps

JACK Fuse 12

5A

Provisions for Body Builder (Jack Down Alarm)

CIG LTR Fuse 13

20A

Provisions for Body Builder (Cig Ltr Feed)

ILLUM Fuse 14

10A

IP Cluster, Multifunction Alarm Module, Transmission Range Lamp, and Provision for Body Builder (IP Lamps Dimming)

DRL Fuse 15

20A

DRL Diode Module

RADIO/ACC Fuse 16

15A

Provisions for Body Builder (Radio and Accessory Feed)

MKR LPS Fuse 17

10A

License Lamps and Provisions for Body Builder (Marker Lamps)

BRAKE Fuse 18

10A

Stoplamps Switch and Electronic Brake Control Module (EBCM)

RADIO BATT Fuse 19

10A

Provisions for Body Builder (Radio Battery Feed)

Fuse 20

--

Not Used

DATA Fuse 21

10A

Data Link Connector

WIPER Fuse 22

25A

Windshield Wiper Switch and Windshield Wiper Pulse Control Module

FRT PARK Fuse 23

5A

Front Marker and Park Lamps

STEP Fuse 24

5A

Provisions for Body Builder (Step Down Alarm)

POWER ACCY 1 Circuit Breaker

30A

Provisions for Body Builder (Power Accessory 1 Feed)

POWER ACCY 2 Circuit Breaker

30A

Provisions for Body Builder (Power Accessory 2 Feed)

Engine Wiring Harness Junction Block (Underhood Fuse Relay Center), Front View


Object Number: 277438  Size: LF
(1)Park Brake Actuator Position Switch Relay
(2)Horn Relay
(3)Fuel Pump Relay
(4)A/C Relay
(5)Starter Relay
(6)Brake Lamp Relay
(7)Fuse Puller and Spare Fuses
(8)Hot at All Times B+ Feed
(9)Auxiliary Power Studs

Fuse/Circuit Breaker

Rating

Description

PCM-BAT Fuse 27

10A

Powertrain Control Module (PCM)

PRK LPS Fuse 28

30A

Brake Lamps

HORN Fuse 29

20A

Horn Relay

ENG-RH Fuse 30

15A

RH Fuel Injectors and Ignition Coils

ENG-LH Fuse 31

15A

LH Fuel Injectors and Ignition Coils

PCM-I Fuse 32

10A

Powertrain Control Module (PCM)

ENG-I Fuse 33

20A

Engine Control Sensors

AUTO PARK Fuse 34

10A

Park Brake Components

ALT/START Fuse 35

10A

Generator and Starter Relay

A/C CMPR Fuse 36

10A

A/C Compressor Relay

Fuse 37-38

--

Not Used

FUEL PUMP Fuse 39

20A

Fuel Pump

Fuse 40-44

--

Not Used

B STUD Fuse 45

30A

B Stud

A STUD Fuse 46

30A

A Stud

LIGHTING Fuse 47

50A

CTSY, PK LPS, DRL and DATA Fuses

BATTERY Fuse 48

50A

STOP/HAZ, AUX PWR, CIG LTR and RADIO BATT Fuses, PWR ACCY 1 CKT BRKR 25

IGN A Fuse 49

40A

Starter Relay and Ignition Switch

IGN B Fuse 50

50A

Ignition Switch

ABS Fuse 51

60A

Electronic Brake Control Module (EBCM)

BLOWER Fuse 52

30A

Body Builder HVAC Blower use

POWER BRAKE Fuse 53

60A

Power Brake Booster Pump Motor

AUTO PARK Fuse 54

60A

Park Brake Pump Motor Relay