2009 CADILLAC STS relay

The underhood fuse block is located in the front of
the engine compartment on the passenger side of
the vehicle. SeeEngine Compartment Overview on
page 5-12for more information on location and removal
procedure for the front compartment underhood sights
shields.
To access the fuses, push in the tabs located on each
side of the fuse block cover, then lift the cover off.
Notice:Spilling liquid on any electrical components
on the vehicle may damage it. Always keep the
covers on any electrical component.
Fuses JCase Usage
ABS MTRABS Module - ABS Module -
Stabilitrak
AFS Active Front Steering
BLWR Blower Motor
FAN 1 Cooling Fan-Low Speed
FAN 2 Cooling Fan-High Speed
LPDB 1 Driver Side Rear Fuse Block
LPDB 2 Driver Side Rear Fuse Block
RPDB 1 Passenger Side Rear Fuse Block
RPDB 2 Passenger Side Rear Fuse Block
Fuses JCase Usage
SPARE Spare
SPARE Spare
STRTR Starter
Fuses Mini Usage
A/C CLTCH Air Conditioning Compressor Clutch
ABS ABS Module-Stabilitrak
ABS IGN Antilock Brake Controller
AUX OUTLET Rear Accessory Power Outlet
BRK VAC
PUMPBrake Vacuum Pump
CCP Climate Control Panel
CCP/RLY
COILSClimate Control Panel, Headlamp
Level Control, Active Cruise Control,
Relay Coils, Starter, Front Blower
ECM 1 Engine Control Module (ECM)
ECM/TCM
BATTECM, Transmission Control
Module (TCM)
ECM/TCM IGNECM, TCM, Instrument Panel
Cluster
5-125

Fuses Mini Usage
EKM/I/P MDLEasy Key Module (EKM), Instrument
Panel Module (I/P MDL)
EVEN COILSEven Ignition Coils, Even Fuel
Injectors
FOG LAMP Front Fog Lamps
FRT PWR
OUTLETFront Accessory Power Outlet
FUEL COOL Fuel Cooling
HORN Horn
HTD
WASH/AQSHeated Headlamp Washer,
Air Quality Sensor
HUDHeads-Up Display, Steering Column
Switch
I/BEAM IntelliBeam Relay
I/P MDL/ALDLInstrument Panel Module, Assembly
Line Data Link Connector
LIC DIMLicense Plate, Instrument Panel
Dimming
LT HI BEAM Driver Side High Beam Headlamp
LT LO BEAM Driver Side Low Beam Headlamp
LT PRKDriver Side Park Lamp/Driver Side
TaillampFuses Mini Usage
ODD COILSOdd Ignition Coils, Odd Fuel
Injectors
POST O2
SNSRPost Oxygen Sensor
PRE O2 SNSR Pre Oxygen Sensor, CAM Sensors
RAIN
SNSR/TPMRain Sensor, Relay Coil:
Headlamp Wash
RT HI BEAMPassenger Side High Beam
Headlamp
RT LO BEAMPassenger Side Low Beam
Headlamp
RT PRKPassenger Side Park Lamp,
Passenger Side Taillamp
SPARE Spare
SPARE Spare
SPARE Spare
SPARE Spare
SPARE Spare
SPARE Spare
SPARE Spare
5-126

Fuses Mini Usage
V/CHKInstrument Panel Module-Voltage
Check
WPR Wipe/Wash Module Assembly
WPR SW/VICS Rain Sensor, Wiper Switch
Relays Usage
A/C CMPRSR
CLTCHAir Conditioning Compressor Clutch
ACCYAccessory, Rain Sensor, Headlamp
Washer Relay Coil, Windshield
Wiper/Washer Module
BRK VAC
PUMPBrake Vacuum Pump
FAN S/P Cooling Fan Series/Parallel
FOG LAMP Fog Lamps
FRT BLWR Front Blower Motor
FUEL COOL Fuel Cooling Pump
HI BEAM High Beam Headlamp
HI FAN SPD Cooling Fan High Speed
HORN Horn
Relays Usage
LO FAN SPD Cooling Fan Low Speed
LOW BEAM
W/O HID/HIDLow Beam Headlamp, High Intensity
Discharge (HID)
PRK LAMPParking Lamps, Instrument Panel
Dimming, Rear License Plate Lamps
PWR/TRN Engine Controls
RUN CRNKHeated Washer Nozzle, Air Quality,
Antilock Brake System, Climate
Control Panel, TCM, ECM,
Instrument Panel Cluster
SPARE Spare
SPARE Spare
SPARE Spare
STRTR Starter
WPR HI Windshield Wiper High Speed
Circuit
BreakersUsage
HDLP WASHHeadlamp Washer Motor
(Circuit Breaker)
5-127

Fuses Usage
ELC EXHElectronic Level Control,
Exhaust Solenoid (Option)
DDMDriver Door Module, Front Door
SubWoofers (Option)
TV/VICS/SCMInfotainment (Export Only),
Supervisory Control Module (Option)
REAR
HTD/SEATSRear Heated Seats
SPARE Spare
SPARE Spare
IGN3Front Passenger Heated Seat,
Auto Shifter, Occupant Protection,
Electronic Tension Reducer for
Seatbelt
REAR SHLF
SPKRRear Shelf Speaker (Option)
MSM Memory Seat Module Lumbar
TRUNK
RELSE SWTrunk Release, Valet Lockout
Switch
BCK/UP LAMPReverse Lamps, Rear Parking Aid,
Inside Rearview Mirrors
AIR BAG/BATT Airbag
POS LAMPS Rear Taillamps
ELC CMPRSR Automatic Level Control (Option)Relays Usage
INCLR PUMP Inner Cooler Pump (Option)
ELC CMPRSRElectronic Level Control,
Compressor (Option)
LT POSLeft Rear Taillamp, Position
Lamps (Option)
RT POSRight Rear Taillamp, Position
Lamps (Option)
RUN Ignition 3
STDBY LAMPRear Taillamps, Position
Lamps (Option)
TRUNK RELSE Trunk Release Motor
BCK/UP LAMPReverse Lamps, Rear Parking Aid,
Inside Rearview Mirror
Circuit
BreakersUsage
PWR SEATS Power Seats
Diodes Usage
SPARE Spare
Joint
ConnectorUsage
J/C Splice Pack (Green)
5-131

Fuses Usage
RDO/ONSTAR Radio, OnStar®
INT LAMP Interior Lamps
LT TRN/LDWLeft Turn Signal, Lane Departure
Warning (Option)
REAR DEFOG Rear Defogger
REAR/FOG Rear Fog Lamps (Option)
RIM Rear Integration Module
RIM /RPA
/ISRVM /CLMRear Integration Module, Rear
Parking Aid, Inside Rearview Mirror,
Column Lock Module, Power
Sounder, Active Front Steering
(AFS), Supervisory Control Module
RUN/CRNKUHBEC Run, CRNK Relay Coil,
Rear Fog Lamp Relay Coil
S/ROOF Sun Roof Module (Option)
SPARE Spare
STOP LAMPS Stop Lamps
RT TRN/SZBARight Turn Signal, Side Blind Zone
Alert (Option)
Relays Usage
DIFF PUMP Rear Differential Pump (Option)
FUEL PUMP Fuel Pump
INT LAMP Interior Lamps
REAR DEFOG Rear Defogger
REAR/FOG Rear Fog Lamps (Option)
RUN/CRNK Ignition 1
SPARE Spare
STOP LAMP Stop Lamp
Circuit
BreakersUsage
WINDOW
MTRSPower Window Motors Circuit
Breaker
Diodes Usage
TRUNK DIODE Trunk Release
Joint
ConnectorUsage
J/C Splice Pack (Blue)
5-133