The Chevrolet Cobalt (2004-2011) is a compact car that features a well-organized electrical system managed by fuses and relays to ensure the smooth operation of various components.

The fuse box in the Cobalt is located in two main areas: one in the engine compartment and another inside the vehicle. The engine compartment fuse box is responsible for high-power systems like the engine control, headlights, and cooling fans. The interior fuse box manages lower-power systems such as the radio, power windows, and interior lighting. Fuses protect the electrical circuits by breaking the flow of current in case of an overload or short circuit.

The relays in the Cobalt control key components, including the fuel pump, starter, and cooling fans. Relays act as electrical switches that enable low-power circuits to control higher-power systems. If a relay fails, the associated component may not function properly, such as the engine failing to start due to a faulty starter relay.

Regular inspection of both fuses and relays is essential to maintaining the Cobalt’s electrical systems and ensuring the vehicle operates without interruptions or malfunctions.

MUST READ: DYI – How to Check Car Fuses?

(2004-2011) Chevrolet Cobalt fuse box and relay with Diagram

WARNING

  • Never replace a fuse with one that has a higher amperage rating.
  • A fuse with a too-high amperage could damage the electrical part and cause a fire.
  • On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
  • If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
  • Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Chevrolet Cobalt 2004-2011 fuse assignment

  • Cigar lighter (power outlet) fuse in the Chevrolet Cobalt is located in the Engine Compartment fuse box (see fuse “OUTLET” or “LTR”).

Year of production: from 2004, 2005, 2006, 2007, 2008, 2009, 2010 2011

Passenger Compartment Fuse Box

Fuse Box Location

The location of the fuses in the passenger compartment: Chevrolet Cobalt (2004-2011)
The location of the fuses in the passenger compartment: Chevrolet Cobalt (2004-2011)

It is located on the passenger side of the vehicle, on the lower portion of the instrument panel near the floor, behind the cover.

Fuse box diagram

Chevrolet cobalt fuse box floor console
Chevrolet cobalt fuse box floor console

Assignment of the fuses in the Passenger Compartment

NameDescriptionRating
1FUSE PULLER
2EMPTYNot Used
3EMPTYNot Used
4EMPTYNot Used
5EMPTYNot Used
6AMP FuseAudio Amplifier (UQ3)20A
7CLSTR FuseInstrument Panel Cluster (IPC)10A
8IGN SW/PK3+ FuseIgnition Switch2A
9STOP LP FuseNot Used10A
10HVAC/PK3+ FuseHVAC Control Module, Theft Deterrent Control Module10A
11EMPTY
12SPARENot Used20A
13AIRBAG FuseInflatable Restraint Front Passenger Presence System (PPS) Module, Inflatable Restraint Sensing and Diagnostic Module (SDM)10A
14SPARENot Used10A
15WPR FuseWindshield Wiper/Washer Switch, Turbocharger Boost Gage (INf)10A
16HVAC/IP IGN FuseClutch Pedal Start Switch (M/T), Instrument Panel Cluster (IPC), Heated Seat Switches (KA1), HVAC Control Module, Inflatable Restraint Passenger Air Bag On/Off Indicator10A
17WNDW RAP FuseNot Used2A
18EMPTY
19EPS/STR WHL CNTRL FuseElectronic Power Steering Control Module (PSCM), Steering Wheel Controls – Left (K34, UK3)2A
20S ROOF FuseSunroof Switch15A
21SPARENot Used20A
22EMPTY
23RDO FuseRadio, Remote Control Door Lock Receiver (RCDLR) (AUO)15A
24XM/ONSTAR FuseVehicle Communication Interface Module (VCIM) (UE1), Digital Radio Receiver (DRR)10A
25ECM/TCM FuseEngine Control Module (ECM), Transmission Control Module (TCM)10A
26DR LCK FuseDOOR LOCK PCB Relay, DOOR UNLOCK PCB Relay, DR DOOR UNLOCK PCB Relay, INT LIGHT PCB Relay15A
27INT LIGHT FuseINT LIGHT PCB Relay10A
28SWC BKLT FuseSteering Wheel Controls2A
29PWR WNDW FuseDriver Window Switch, Front Passenger Window Switch30A
30HVAC RelayBlower Motor
31EMPTY
32RAP RelayPWR WNDW Fuse 29, S ROOF Fuse 20
Printed Circuit Board (PCB) Relays – Not Serviceable:
INT LIGHT PCB RelayDome Lamp, Inside Rearview Mirror
DOOR LOCK PCB RelayBCM Logic, Door Latches
DOOR UNLOCK PCB RelayBCM Logic, Door Latches
DR DOOR UNLOCK PCB RelayBCM Logic, Driver Door Latch
IGN 3 PCB RelayBlower Motor

Engine Compartment Fuse Box

Fuse Box Location

The location of the fuses in the engine compartment: Chevrolet Cobalt (2004-2011)
The location of the fuses in the engine compartment: Chevrolet Cobalt (2004-2011)

It is located in the engine compartment, under the cover.

Fuse box diagram (Type 1)

Under-hood fuse box diagram (Type 1): Chevrolet Cobalt
Under-hood fuse box diagram (Type 1): Chevrolet Cobalt

Assignment of the fuses and relay in the Engine Compartment Fuse Box (Type 1)

NameDescriptionRating
ABSElectronic Brake Control Module (EBCM)40A
ABS2Electronic Brake Control Module (EBCM)10A
ABS3Electronic Brake Control Module (EBCM)20A
A/C CLTCHA/C Compressor Clutch (C60)10A
A/C CLTCH RelayA/C CLTCH
AIR PUMPAIR PUMP Relay (NU6)40A
AIR PUMP RelaySecondary Air Injection (AIR) Pump (NU6)
AIR SOLSecondary Air Injection (AIR) Solenoid (NU6)10A
AIR SOL/COOL FAN2 RelayAIR SOL (L61+NU6), Cooling Fan – 2 (LNF)
BCK UPBack Up Lamp Switch (M/T), Park Neutral Position (PNP) Switch (AT)10A
BCM2AMP 6, CLSTR 7, HVAC/PK3+ 10, IGN SW/PK3+ 8, STOP LP 9 (BCM s)40A
BCM3HVAC Relay 30 (BCM)30A
CHMSLCHMSL Relay10A
CHMSL RelayEngine Control Module (ECM), Transmission Control Module (TCM), Center High Mounted Stop Lamp (CHMSL)
CNSTR VENTEvaporative Emission (EVAP) Canister Vent Solenoid10A
COOL FAN 1COOL FAN1 Relay30A
COOL FAN 2COOL FAN2 Relay30A
COOL FAN 1 RelayCooling Fan Diode (L61), Cooling Fan Motor (L61), Cooling Fan 1 (LNF), Cooling Fan Resistor (LE5)
COOL FAN 2 (Turbo) COOL FANS RelayCooling Fan
CRNKCRNK Relay30A
CRNK RelayStarter
DLCData Link Connector (DLC)15A
DRLRT and LT LO BEAM s10A
ECM/TRANSEngine Control Module (ECM), Transmission Control Module (TCM) (MN5)15A
ENG VLV SOL (LNF)Turbocharger Wastegate Solenoid, Turbocharger Bypass Valve Solenoid, Camshaft Position (CMP) Actuator Solenoid – Intake, Camshaft Position (CMP) Actuator Solenoid – Exhaust10A
EXHEvaporative Emission (EVAP) Canister Purge Solenoid, HO2S Sensors, Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor10A
EPSElectronic Power Steering (EPS) Control Module (PSCM)60A
FOG LAMPLeft Front and Right Front Fog Lamps (T37)15A
FUEL PUMPFuel Pump and Sender Assembly15A
FUEL PUMP RelayFUEL PUMP
HORNHorn10A
INJFuel Injectors, Ignition Coil/Modules15A
IP IGNBody Control Module (BCM)20A
LT HI BEAMLeft Headlamp10A
LT LO BEAMLeft Headlamp10A
MIR/UGDOOutside Rearview Mirror Switch (DG7)5A
OUTLETCigar Lighter (DT4), Auxiliary Power Outlet20A
PCM/ECMEngine Control Module (ECM)20A
PRK LAMPBody Control Module (BCM), License Lamps, Marker Lamps

Park/Turn/DRL Signal Lamps, Tail/Stop and Turn Signal Lamps
10A
PWR/TRN RelayEXH , INJ , PCM/ECM , ENG VLV SOL
REAR DEFOGREAR DEFOG Relay40A
REAR DEFOG RelayRear Window Defogger Grid
RT LO BEAMRight Headlamp10A
RT HI BEAMRight Headlamp10A
RUN/CRNK RelayECM/TRANS , IP IGN , BCK UP , ABS2
SDMInflatable Restraint Sensing and Diagnostic Module (SDM), Body Control Module (BCM)10A
TRUNK/HEATED SEATSTRUNK PCB Relay, Driver and Passenger Heated Seat Modules20A
WPRWPR ON/OFF Relay25A
WPR ON/OFF RelayWPR HI/LO Relay
WPR HI/LO RelayWindshield Wiper Motor
Printed Circuit Board (PCB) Relays – Not Serviceable:
DRL PCB RelayDRL
FOG LAMP PCB RelayFOG LAMP
HI BEAM PCB RelayLT HI BEAM, RT HI BEAM
HORN PCB RelayHORN
LO BEAM PCB RelayLT LO BEAM, RT LO BEAM
PRK LAMP PCB RelayPRK LAMP
TRUNK PCB RelayRear Compartment Lid Release Actuator

Fuse box diagram (Type 2)

Under-hood fuse box diagram (Type 2): Chevrolet Cobalt
Under-hood fuse box diagram (Type 2): Chevrolet Cobalt

Assignment of the fuses and relay in the Engine Compartment Fuse Box (Type 2)

NameDescriptionRating
A/C CLTCHA/C Compressor Clutch (C60)10A
A/C CLTCH RelayA/C CLTCH
AIR SOLSecondary Air Injection (AIR) Solenoid (w/NU6)15A
AIR SOL RelayAIR SOL(w/NU6)
ABSElectronic Brake Control Module (EBCM)50A
ABS 2Electronic Brake Control Module (EBCM)10A
AIR PMPAIR PMP40A
AIR PMP RelayAIR PMP Relay
BCK UPBack Up Lamp Switch (M/T), Park Neutral Position (PNP) Switch (A/T)10A
BCM 2Body Control Module (BCM)40A
BCM 3Body Control Module (BCM)30A
CNSTR VENTEvaporative Emission (EVAP) Canister Vent Solenoid10A
COOL/FAN1Cooling Fan 130A
COOL/FAN2Cooling Fan 230A
COOL/FAN 1 RelayCooling Fan
COOLING FAN 2 RelayCooling Fan
CRNKCrank Relay30A
CRNK RelayStarter
ECM/TRANSTransmission Control Module (TCM), Engine Control Module (ECM) (L61)15A
EMISNHeated Oxygen Sensor (HO2S) Sensor 1, Heated Oxygen Sensor (HO2S) Sensor 2, Evaporative Emission (EVAP) Canister Purge Solenoid, Clutch Pedal Position (CPP) Switch, Mass Air Flow (MAF).Inlet Air Temperature (IAT) Sensor10A
EPSElectric Power Steering Control Module60A
FOG LPLF Fog Lamp, RF Fog Lamp15A
FUEL PMPFuel Pump and Sender Assembly15A
FUEL PMP RelayFUEL PUMP , Fuel Pump and Sender Assembly
HORNHorn10A
HTD SEATSHeated Seat Module – Driver, Heated Seat Module – Passenger20A
INJFuel Injector 1, Fuel Injector 2, Fuel Injector 3, Fuel Injector 4, Ignition Control Module (ICM)10A
IP IGNBody Control Module20A
LH HI BEAMLeft Headlamp10A
LH LO BEAMLeft Headlamp10A
LTRCigar Lighter (DT4), Data Link Connector (DLC)15A
MIR (S)Outside Rearview Mirror Switch (DG7)5A
PCM/ECMEngine Control Module (ECM)15A
PRK LPSLamp Assembly – LF, Lamp Assembly – RF, Stop/Tail and Turn Signal Lamp – Left,Body Control Module (BCM), Side Marker Lamp – Left, Side Marker Lamp – Right, License Lamp, Stop/Tail and Turn Signal Lamp – Right15A
PRK/NEUTPark Neutral Position (PNP) Switch (MN5)10A
PWR/TRN RelayPower Train Relay
RH LO BEAMRight Headlamp10A
RH HI BEAMRight Headlamp10A
S BAND/ONSTARVehicle Communication Interface Module (VCIM) (UE1), Digital Radio Receiver (U2K)10A
RDFGRDFG Relay40A
RDFG RelayRear Window Defogger Grid
RUN/CRNK RelayECM/TRANS , IP IGN , BCK UP , ABS ,
TRUNK/OUTLETTRUNK RELEASE PCB Relay, Auxiliary Power Outlet – Console20A
WPRWPRr Relay25A
WPR 1 RelayWPR 2 Relay
WPR 2 RelayWindshield Wiper Motor
Printed Circuit Board (PCB) Relays – Not Serviceable:
FOG LP PCB RelayFOG LP
HI BEAM PCB RelayLH HI BEAM , RH HI BEAM
HORN PCB RelayHORN
LO BEAM PCB RelayLH LO BEAM , RH LO BEAM
PRK LPS PCB RelayPRK LPS
TRUNK RELEASE PCB RelayRear Compartment Lid Release Actuator

Conclusion

For owners and enthusiasts of classic Chevrolet Cobalt 2004-2011, understanding the fuse box and relay systems is essential for vehicle maintenance. Regular inspection and maintenance of these components helped ensure the vehicle’s longevity and reliability, preserving its status as a symbol of Chevrolet’s craftsmanship and innovation in the automotive industry during that era.

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