GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Optra 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 Harness Routing Views
Figure 1:

ABS Harness Routing
Object Number: 1855595 Size: MF
(1)G106
(2)Electronic Brake Control Module (EBCM)
(3)Oil Feeding Connector
(4)C111
(5)C110
(6)Wheel Speed Sensor
Figure 2:

Rear ABS Harness Routing
Object Number: 1855597 Size: MF
(1)Rear Wheel Speed Sensor
(2)C901
Figure 3:

Battery Harness Routing
Object Number: 1855594 Size: MF
(1)G103
(2)G105
(3)Starter
(4)Generator
Figure 4:

Body Harness Routing - Bulkhead
Object Number: 1855589 Size: MF
(1)Wiper Motor
(2)Brake Fluid Level Switch
(3)C101, C102, C105
(4)C108
(5)C103
Figure 5:

Body Harness Routing - Rear
Object Number: 1855588 Size: MF
(1)C401
(2)Rear Compartment Lamp
(3)C403
(4)C404
(5)Door Ajar switch - LR
(6)Fuel Pump
(7)Fuel Tank Pressure Sensor
(8)C901
Figure 6:

Door Harness Routing
Object Number: 1291842 Size: MF
(1)Status Display
(2)C351
(3)Tweeter
(4)Door Speaker
(5)Trunk Open Switch
(6)Door Lock Switch
(7)Power Window Switch
(8)Door Lock Actuator
(9)Central Locking and Theft Deterrent
(10)Rear Door Lock Actuator
(11)Tweeter
(12)C371/C381
(13)Rear Door Speaker
(14)Rear Door Power Window Motor
(15)Rear Door Power Window Switch
Figure 7:

Floor Harness Routing
Object Number: 1291833 Size: MF
(1)Trunk Room Lamp
(2)CHMSL
(3)Rear Door Contact Switch
(4)G302
(5)C351
(6)Front Door Contact Switch
(7)Side Air Bag
(8)Side Air Bag Sensor
(9)C301
(10)Parking Brake Switch
(11)Fuel Pump
(12)C302
(13)C351
(14)Side Air Bag Sensor
(15)Front Door Contact Switch
(16)C371
(17)Rear Door Contact Switch
(18)C207
(19)Side Air Bag
(20)G301
Figure 8:

Front Harness Routing
Object Number: 1291805 Size: MF
(1)C109
(2)Left Hand Headlamp
(3)Main Cooling Fan
(4)Auxiliary Cooling Fan
(5)Right Hand Turn Signal Lamp
(6)Right Hand Headlamp
(7)Right Hand Fog Lamp
(8)Side Turn Signal Lamp
(9)Horn
(10)Cooling Fan Resistor
(11)G101
(12)C104
Figure 9:

Instrument Panel Harness Routing - LHD
Object Number: 1291841 Size: MF
(1)Headlamp Leveling Switch
(2)Instrument Cluster
(3)SP202
(4)C207
(5)Hazard Switch
(6)Clock
(7)Outside Rearview Mirror
(8)C208
(9)SP204
(10)G204
(11)Auxiliary Power Outlet
(12)C210
(13)PRNDL Illumination
(14)BTSI Solenoid
(15)Hold Switch
(16)Cigar Lighter and Ash Tray
(17)A/C Control Switch
(18)Radio
(19)SP203
(20)C202
(21)Dimmer Control Unit
Figure 10:

Instrument Panel Harness Routing - RHD
Object Number: 1855585 Size: MF
(1)Clock
(2)Hazard Switch
(3)C207
(4)S202
(5)Cluster
(6)Headlamp Leveling Switch
(7)Dimmer Control Switch
(8)C202
(9)Multifunction Alarm Module
(10)S203
(11)Radio
(12)A/C Control Switch
(13)Cigar and Ash Tray
(14)Hold Mode Switch
(15)Shiftlock Control Solenoid
(16)PRNDL Illumination
(17)C302
(18)Auxiliary Power Outlet
(19)G203
(20)S204
Figure 11:

Instrument Panel Harness Routing - Below Steering Column
Object Number: 1855586 Size: MF
(1)S202
(2)Cluster
(3)S201
(4)C201
(5)C202
(6)C206
(7)Data Link Connector
(8)Multifunction Alarm Module
(9)Stop Lamp Switch
(10)C207
Figure 12:

Instrument Panel Harness Routing - Steering Column
Object Number: 1855587 Size: MF
(1)Wiper Switch
(2)Horn Switch
(3)Headlamp Switch
(4)Light Switch
(5)Ignition Switch
Figure 13:

Engine Harness Routing - MR140/HV240
Object Number: 1855591 Size: MF
(1)Engine Control Module (ECM)
(2)Linear Exhaust Gas Recirculation (EGR) Valve
(3)Manifold Absolute Pressure (MAP) Sensor
(4)Fuel Injectors
(4)Fuel Injector
(4)Fuel Injector
(5)Crankshaft Position (CKP) Sensor
(6)Camshaft Position (CMP) Sensor
(7)Throttle Position (TP) Sensor
(8)Generator
(9)Knock Sensor (KS)
(10)Oil Pressure Switch
(11)Engine Control Module (ECM)
(12)G104
(13)G107
(14)Idle Air Control (IAC) Valve
(15)Starter
(16)Vehicle Speed Sensor (VSS)
(17)Evaporative Emissions (EVAP) Purge Solenoid Valve
(18)Back Up Lamp Switch
(19)Heated Oxygen Sensor 1 (HO2S1)
(20)C108
(21)C103, C106
(22)C109
(23)Engine Coolant Temperature (ECT) Sensor
(24)Ignition Coil Module
Figure 14:

Engine Harness Routing - MT34
Object Number: 1855592 Size: MF
(1)C103, C106
(2)C109
(3)Ignition Coil Module
(4)Linear Exhaust Gas Recirculation (EGR) Valve
(5)Engine Control Module (ECM)
(6)Manifold Absolute Pressure (MAP) Sensor
(7)Fuel Injectors
(7)Fuel Injector
(7)Fuel Injector
(8)Crankshaft Position (CKP) Sensor
(9)Camshaft Position (CMP) Sensor
(10)Throttle Position (TP) Sensor
(11)Generator
(12)Knock Sensor (KS)
(13)Oil Pressure Switch
(14)Engine Control Module (ECM)
(15)G104
(16)G107
(17)Starter
(18) Vehicle Speed Sensor (VSS)
(19)Evaporative Emissions (EVAP) Purge Solenoid Valve
(20)Back Up Lamp Switch
(21)Heated Oxygen Sensor 1 (HO2S1)
(22) C108
Figure 15:

Engine Harness Routing - Sirius D4
Object Number: 1855590 Size: MF
(1)Intake Manifold Tuning Valve Solenoid
(2)Exhaust Gas Recirculation (EGR) Valve
(3)Oil Pressure Switch
(4)Oxygen Sensor
(5)Crankshaft Position (CKP) Sensor
(6)Linear EGR Valve
(7)Fuel Injector
(8)Manifold Absolute Pressure (MAP) Sensor
(9)Fuel Injectors
(10)Camshaft Position (CMP) Sensor
(11)Throttle Body
(12)A/C Refrigerant Pressure Sensor
(13)Generator
(14)Knock Sensor (KS)
(15)Intake Manifold Tuning Valve Solenoid
(16)Intake Air Temperature (IAT) Sensor
(17)Starter
(18)Vehicle Speed Sensor (VSS)
(19)Ignition Coil Module
(20)C103, C106
(21)C108
(22)Engine Control Module (ECM)
Figure 16:

Liftgate Rear Harness Routing
Object Number: 1485784 Size: MF
(1)C402
(2)CHMSL
(3)Defog (+)
(4)RR Combination Lamp RH
(5)T/Gate Actuator
(6)Temper Switch
(7)License Lamp
(8)RR Wiper Motor
(9)C406
(10) RR Combination Lamp LH
(11)Defog (-)
(12)C405
(13)C404
(14)C403
Figure 17:

Rear Harness Wiring
Object Number: 1291817 Size: MF
(1)Trunk Latch Switch
(2)Theft Deterrent Tamper Switch
(3)License Plate Lamp
Figure 18:

Roof Harness Routing
Object Number: 1855601 Size: MF
(1)Dome Lamp
(2)Sunroof Module
(3)Reading Lamp
(4)Rain Sensor
(5)Dome Lamp/Sunroof Switch
(6)G205
(7)C204
Figure 19:

Supplemental Inflatable Restraint (SIR) Harness Routing - LHD
Object Number: 1855606 Size: MF
(1)Driver Airbag
(2)Passenger Airbag
(3)G202
(4)C301
(5)Sensing and Diagnostic Module
Figure 20:

Supplemental Inflatable Restraint (SIR) Harness Routing - RHD
Object Number: 1855608 Size: MF
(1)Passenger Airbag
(2)Sensing and Diagnostic Module
(3)C301
(4)Driver Airbag
Figure 21:

Transmission Control Module (TCM) Harness Routing - Aisin 81-40LE
Object Number: 1855599 Size: MF
(1)C206
(2)Transmission Control Module (TCM)
(3)Input Shaft Speed Sensor
(4)Park/Neutral Position (PNP) Switch
(5)Vehicle Speed Sensor (VSS)
(6)Park/Neutral Position (PNP) Switch
Figure 22:

Transmission Control Module (TCM) Harness Routing - ZF 4HP 16
Object Number: 1855600 Size: MF
(1)C206
(2)Transmission Control Module (TCM)
(3)Park/Neutral Position (PNP) Switch
Figure 23:

Trunk Harness Routing
Object Number: 1855603 Size: MF
(1)G401
(2)Tail Lamp
Figure 24:

Trunk Harness Routing - Hatchback
Object Number: 1855604 Size: MF
(1)Tail Lamp - Right
(2)G401
(3)Tail Lamp - Left
(4)C401