Harness Routing Views. Buick LeSabre 2003

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2003 🢒 LeSabre 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Harness Routing Views

Figure 1:

Inline Connectors


(1)	C109
(2)	C108
(3)	C102
(4)	Fuse Block -- Underhood C1
(5)	Fuse Block -- Underhood C2
(6)	Fuse Block -- Underhood C3
(7)	C101
(8)	C112
(9)	C216
(10)	C200
(11)	C202
(12)	C302
(13)	C303
(14)	C215
(15)	C205
(16)	C204
(17)	C201
(18)	C106
(19)	C500
(20)	C503
(21)	C700
(22)	C701
(23)	C703
(24)	C600
(25)	C603
(26)	C800
(27)	C801
(28)	C803
(29)	C301
(30)	C406
(31)	Fuse Block -- Rear C3
(32)	Fuse Block -- Rear C2
(33)	Fuse Block -- Rear C1
(34)	C329
(35)	C401
(36)	C402
(37)	C420
(38)	C410
(39)	C405
(40)	C400

Figure 2:

Harness Pass Throughs


(1)	P103
(2)	P102
(3)	P104
(4)	P600
(5)	P800
(6)	P400
(7)	P402
(8)	P410
(9)	P403
(10)	P401
(11)	P700
(12)	P500
(13)	P100

Figure 3:

Upper Side of Engine


(1)	Exhaust Gas Recirculation (EGR) Valve
(2)	Fuel Injector #6
(3)	Fuel Injector #4
(4)	Fuel Injector #2
(5)	To Generator
(6)	To Air Solenoid
(7)	Heated Oxygen Sensor (H02S) Bank 1 Sensor 1
(8)	S103
(9)	S104
(10)	To PCM
(11)	C100

Figure 4:

Upper Front of Engine


(1)	Fuel Injector 3
(2)	Evaporative Emissions (EVAP) Purge Canister
(3)	Fuel Injector 5
(4)	Idle Air Control (IAC) Valve
(5)	Throttle Position (TP) Sensor
(6)	Mass Air Flow (MAF) Sensor
(7)	S106
(8)	Engine Coolant Temp (ECT) Sensor
(9)	C103
(10)	S108
(11)	S107
(12)	Ignition Control Module (ICM)
(13)	To Manifold Absolute Pressure (MAP) Sensor
(14)	Fuel Injector 1

Figure 5:

Rear of the Engine, Below the Power Steering Pump


(1)	S101
(2)	S102

Figure 6:

Left Front Corner of the Vehicle


(1)	C108 (Left); C109 (Right)
(2)	Horn Assembly
(3)	Foglamp (Left Shown, Right Similar)
(4)	Forward Lamp Harness
(5)	Headlamp Assembly (Left Shown, Right Similiar)
(6)	Radiator

Figure 7:

Engine Compartment, in the Left Front Corner


(1)	Powertrain Control Module (PCM) C1
(2)	Powertrain Control Module (PCM) C2
(3)	Air Cleaner Assembly
(4)	Powertrain Control Module (PCM)
(5)	S105

Figure 8:

Engine Compartment, In the Right Front Corner


(1)	Body Harness
(2)	Fuse Block-Underhood C2
(3)	Forward Lamp Harness
(4)	G103
(5)	S100
(6)	Fuse Block-Underhood C1
(7)	C102

Figure 9:

Engine Compartment, Near the Left Shock Tower


(1)	Brake Fluid Level Sensor
(2)	Cruise Control Module
(3)	C101
(4)	G106

Figure 10:

Engine Compartment, Left Rear


(1)	C101
(2)	Brake Fluid Level Switch Connector
(3)	Cruise Control Module Connector
(4)	G106
(5)	C106
(6)	P100
(7)	C112

Figure 11:

Engine Compartment, Right Rear


(1)	P104
(2)	P100
(3)	Body Harness, Leftside
(4)	Battery Cable
(5)	Body Harness, Right Side
(6)	P102
(7)	C106

Figure 12:

Passenger Compartment, Lower Left Front Corner


(1)	C215
(2)	S215
(3)	S216
(4)	P100
(5)	Inflatable Restraint Steering Wheel Module Coil
(6)	C200
(7)	C202
(8)	To Stop Lamp Switches
(9)	C500
(10)	G200
(11)	S217
(12)	Park Brake Switch

Figure 13:

Passenger Compartment, In The Right Front Corner


(1)	Blower Motor Connector
(2)	Inflatable Restraint IP Module
(3)	G201
(4)	C600
(5)	Right Side Body Harness
(6)	Dash Integration Module (DIM), C1
(7)	Dash Integration Module (DIM), C2
(8)	Dash Integration Module (DIM), C3
(9)	P102
(10)	C201

Figure 14:

Instrument Panel, Left Side Rear View


(1)	S205
(2)	S209
(3)	S210
(4)	S253
(5)	Instrument Panel Integration Module (IPIM)
(6)	Instrument Panel Integration Module (IPIM) C2
(7)	Instrument Panel Integration Module (IPIM) C1
(8)	S252
(9)	S251
(10)	S202
(11)	S203
(12)	Data Link Connector (DLC)
(13)	C200

Figure 15:

Instrument Panel, Right Side Rear View


(1)	C201
(2)	S205
(3)	C205
(4)	C204
(5)	Courtesy Lamp Connector
(6)	Rear Compartment Lid Release Switch Connector

Figure 16:

Dash Panel, Right Front View


(1)	Radio Antenna Connector
(2)	Antenna Cable
(3)	C201

Figure 17:

Instrument Panel, Left Side Front View


(1)	Drivers Infomation Center (DIC)
(2)	S203
(3)	Turn Signal/Hazard Flasher Module
(4)	Cigar Lighter (w/o D55)
(5)	Cigar Lighter (w/ D55)
(6)	Head Up Display Switch
(7)	Headlamp Switch
(8)	Inside Air Temperature Sensor
(9)	S206
(10)	Head Up Display (HUD)
(11)	Instrument Panel Cluster (IPC) C1
(12)	S201
(13)	Instrument Panel Cluster (IPC) C2
(14)	S200
(15)	S208
(16)	S207
(17)	S204
(18)	Sunload Sensor Assembly

Figure 18:

Under Right Side of Dash


(1)	C205 (CJ2)
(2)	S222
(3)	S221
(4)	S220
(5)	C204 (C67)

Figure 19:

Passenger Compartment, Wiring Harness Under the Carpet


(1)	S401
(2)	S307
(3)	SP306
(4)	S302
(5)	S305
(6)	S304
(7)	S303
(8)	SP301
(9)	C301
(10)	SP310
(11)	C301
(12)	C303
(13)	Battery
(14)	S309
(15)	S308
(16)	Fuse Block -- Rear

Figure 20:

Under the Right Front Seat


(1)	Right Front Seat (Left Similiar)
(2)	C301 (Right); C302 (Left)
(3)	Passenger Inflatable Restraint Side Impact Inflator Module (Driver Side Similiar)

Figure 21:

LH Front Seat Back


(1)	Lumbar Vertical Position Sensor
(2)	Lumbar Vertical Motor
(3)	LH Seat Recline Motor
(4)	S331
(5)	S330
(6)	Lumbar Horizontal Motor
(7)	Lumbar Horizontal Position Sensor

Figure 22:

Front Seat Wiring


(1)	LH S315, RH S316
(2)	LH S324, RH S322
(3)	LH S321, RH S323
(4)	LH C314, RH C317
(5)	LH C318
(6)	LH S317
(7)	LH S319
(8)	LH S320

Figure 23:

Passenger Compartment, Under the Right Side of the Rear Seat


(1)	G305
(2)	Body Harness, Right Side
(3)	Battery
(4)	C305
(5)	S345 (w/UE1)
(6)	Battery Positive Cable
(7)	Fuse Block - Rear

Figure 24:

Passenger Compartment, Left Rear


(1)	C406
(2)	Body Harness, Left
(3)	Rear Shelf Harness

Figure 25:

Passenger Compartment, Near the Left Rear Pillar


(1)	Headliner Harness
(2)	Left Body Harness
(3)	C329

Figure 26:

Right Front Door Wiring


(1)	P500(LH) P600(RH)
(2)	C500(LH) C600(RH)
(3)	Inline To Body Harness (LH Similar)
(4)	Door Harness (LH Similar)

Figure 27:

Right Front Door Module


(1)	RH Front Door Module (C3) (LH Similar)
(2)	RH Front Door Module (C1) (LH Similar)
(3)	RH Front Door Module (C2) (LH Similar)
(4)	RH Front Door Module (C4) Outside Power Mirror Pigtail (LH Similar)
(5)	C503 (LH) C603 (RH)
(6)	RH Front Door Module (LH Similar)
(7)	S500 (LH) S602 (RH)

Figure 28:

Right Rear Door (LH Similiar)


(1)	C800 (RH); C700 (LH)
(2)	P800 (RH); P700 (LH)
(2)	P800 (RH); P700 (LH)
(3)	C801 (RH); C701 (LH)

Figure 29:

Right Rear Door


(1)	RR Door Lock Actuator; (LR Similar)
(2)	RR Window Motor; (LR Similar)
(3)	C803 (Right); C703 (Left)
(4)	Right Rear Door Module (RRDM); (LRDM Similiar)

Figure 30:

Rear Compartment Lid Wiring


(1)	S412
(2)	S411
(3)	S413

Figure 31:

Rear Compartment, Behind the Rear Seat Back (w/UE1)


(1)	Vehicle Interface Unit (VIU)
(2)	OnStar® GPS Antenna Lead
(3)	Vehicle Communication Unit (VCU)
(4)	S360 and S361
(5)	C345 (Body Harness to OnStar® Harness)
(6)	OnStar® Cellular Antenna Lead

Figure 32:

Left Rear Corner of the Vehicle


(1)	P403 (Left); P402 (Right)
(2)	Tail Lamp Assembly
(3)	Tail Lamp Jumper Harness
(4)	Body Harness
(5)	C400 (Left); C402 (Right)

Figure 33:

Under the Right Rear of the Vehicle


(1)	P401 (Right); P400 (Left)
(2)	C420 (Right Body Harness); C401 (Left Body Harness)
(3)	Fuel Tank Jumper Harness
(4)	Left Body Harness (Right Body Harness Similar)
(5)	Automatic Level Control (ALC) Compressor