Buick Lucerne CX 2009 - 2009 ELECTRICAL Fuses & Circuit Breakers - Lucerne

Buick Lucerne CX 2009 - IDENTIFICATION

CAUTION:

When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See PROGRAMMING AND SETUP article in GENERAL INFORMATION before disconnecting battery.

Buick Lucerne CX 2009 - FUSIBLE LINKS

To identify and/or repair fusible links, see Fig. 1.

Fig. 1: Buick Lucerne CX 2009 - Component Locations - Repairing Fusible Links

Buick Lucerne CX 2009 - REAR FUSE BLOCK

NOTE:

Rear fuse block is located in rear of passenger compartment, under rear seat..

Fig. 2: Buick Lucerne CX 2009 - Component Locations - Identifying Instrument Panel Fuse Box Components

Buick Lucerne CX 2009 Fuse Block - Rear

No.	Device	Rating	Description
1	F/PMP Fuse	20A	Fuel Pump and Sender Assembly
2	PARK LP-LT Fuse	10A	Tail Lamp Assembly - Left, Headlamp Assembly - Left Front, Tail Lamp Assembly - Left Auxiliary
3	RUN3 Fuse	5A	Not Used
4	PARK LP-RT (D) Fuse	10A	Tail Lamp Assembly - Right, Tail Lamp Assembly - Right Auxiliary, Headlamp Assembly - Right Front, License Lamps
5	ECM/TCM Fuse	15A	Engine Control Module (ECM), Transmission Control Module (TCM)
6	MDL-MEM Fuse	10A	Memory Seat Module (MSM) (A45)
7	PARK LP-RT Fuse	10A	(Z75)
8	STG ILLUM Fuse	2A	Steering Wheel Control Switch Illumination
9	MDL-FRT Fuse	30A	Climate Control Seat Module - Front
10	RUN2 Fuse	10A	Climate Control Seat Module - Front (KB6), Floor Shifter Assembly
11	MDL-RR Fuse	20A	Not Used
12	MDL-RPA Fuse	10A	Object Alarm Module (UD7) Side Object Detection - Left (UFT), Side Object Detection - Right (UFT)
13	PASSKEY Fuse	10A	Theft Deterrent Module (TDM), Data Link Connector (DLC), Instrument Panel Cluster (IPC), HVAC Control Module
14	UNLOCK/LOCK Fuse	20A	UNLOCK Relay 62, LOCK Relay 63
15	MDL-RTD Fuse	25A	Electronic Suspension Control Module (F55)
16	DRL Fuse	15A	DRL Headlamps
17	SUN ROOF Fuse	25A	Sunroof Control Module (CF5)
18	BCM (DIM) Fuse	10A	Body Control Module (BCM)
19	BCM Fuse	10A	Body Control Module (BCM)
20	RUN1 Fuse	7.5A	Heated Steering Wheel Control Module (NR7)
21	SW-IGN Fuse	5A	Ignition Switch
22	DDM Fuse	15A	Driver Door Module (DDM)
23	SWS-RR Fuse	20A	(Z75)
24	COMP RELAY Fuse	10A	LEVEL COMP Relay 53, Automatic Level Control (ALC) Compressor, Automatic Level Control Module (FE1/F55)
25	BCM (LTTN) Fuse	15A	Body Control Module (BCM)
26	LTR-CIG Fuse	20A	Cigar Lighter, Auxiliary Power Outlet - Console (A51)
27	NAV Fuse	10A	(Z75)
28	RAP1 Fuse	10A	Floor Shifter Assembly (A51), Park Switch (A51)
29	PDM Fuse	15A	Front Passenger Door Module (FPDM)
30	SDM Fuse	10A	Inflatable Restraint Sensing and Diagnostic Module (SDM), Inflatable Restraint Passenger Presence System (PPS) Module
31	APOs Fuse	20A	Auxiliary Power Outlet - Front
32	BCM (INADV) Fuse	10A	Body Control Module (BCM)
33	RAP2 Fuse	10A	Inside Rearview Mirror, Outside Moisture Sensor (CE1), Sunroof Control Module (CF5)
34	SOL CAN Fuse	10A	Evaporative Emission (EVAP) Valve Canister Vent Solenoid
35	BCM (CTSY) Fuse	10A	Body Control Module (BCM)
36	BCM (RTTN) Fuse	15A	Body Control Module (BCM)
37	TRK REL Fuse	10A	Rear Compartment Lid Latch
38	AMP-RDO Fuse	30A	Amplifier (UQA)
39	BCM (CHMSL) Fuse	10A	Body Control Module (BCM)
40	BCM Fuse	10A	Body Control Module (BCM)
41	STOP LP Fuse	10A	Not Used
42	MDL-ONSTAR Fuse	10A	Vehicle Communication Interface Module (VCIM) (UE1)
43	MDLS-BODY Fuse	10A	Lane Departure Warning Camera (UFL), Garage Door Opener Transmitter, Remote Control Door Lock Receiver (RCDLR)
44	RADIO Fuse	15A	Radio, Digital Radio Receiver (U2K)
45	DR UNLATCH Fuse	10A	(Z75)
46	RR DEFOG Fuse	40A	RR DEFOG Relay 52
47	LEVEL COMP Fuse	40A	LEVEL COMP Relay 53
48	MTR Fuse	40A	Blower Motor Control Module (CJ2)
49	BLOWER Fuse	40A	Blower Motor Control Module (C67)
50	RESISTOR	121 ohms	Data Link Communication
51	BLOWER Relay	-	(Z75)
52	RR DEFOG Relay	-	Rear Window Defogger
53	LEVEL COMP Relay	-	Automatic Level Control (ALC) Compressor (FE1/F55)
54	RF SEAT Circuit Breaker	25A	Seat Adjuster Switch - Passenger, Lumbar Adjuster Switch - Passenger (AE8/AG2)
55	PWR SEAT Circuit Breaker	25A	Seat Adjuster Switch - Driver, Memory Seat Module (MSM) (AG1/AE8/A45)
56	PWR WDO Circuit Breaker	25A	Driver Door Module (DDM), Front Passenger Door Module (FPDM), Window Switch - Left Rear Door, Window Switch - Right Rear Door
57	PWR T/T Circuit Breaker	25A	Memory Seat Module (MSM) (A45/N38)
58	PARK LP-LT Relay	-	PARK LP-LT, PARK LP-RT Fuses
59	FUEL PUMP Relay	-	F/PMP Fuse 1
60	LIC LP Relay	-	Not Used
61	PARK LP-RT Relay	-	Not Used
62	UNLOCK Relay	-	Door Latch Assembly - Left Rear, Door Latch Assembly - Right Rear
63	LOCK Relay	-	Door Latch Assembly - Left Rear, Door Latch Assembly - Right Rear
64	RUN Relay	-	RUN1, RUN2 Fuses
65	DRL Relay	-	DRL Fuse
66	DR UNLATCH Relay	-	Not Used
67	TRK REL Relay	-	TRK REL Fuse
68	STOP LP Relay	-	Not Used
69	OVERHEAD LP Relay	-	Not Used
70	RAP-HC Relay	-	RAP1, RAP2, SUN ROOF Fuses

Buick Lucerne CX 2009 - UNDERHOOD FUSE BLOCK

NOTE:

Underhood Fuse Block is located on right side front of engine compartment.

Fig. 3: Buick Lucerne CX 2009 - Component Locations - Identifying Underhood Fuse Block Components

Buick Lucerne CX 2009 Fuse Block - Underhood

No.	Device	Rating	Description
1	ECM/CRNK Fuse	15A	Engine Control Module (ECM) (LD8), Throttle Actuator Control (TAC) Module, STRTR Relay 30 (LZ9/LGD)
2	FUEL INJ ODD Fuse	15A	Fuel Injector 1, 3, 5, 7, Ignition Coil/Module 1, 3, 5, 7 (LD8), Fuel Injector 1, 2, 3, 4, 5, 6 (LZ9/LGD)
3	FUEL INJ EVEN Fuse	15A	Fuel Injector 2, 4, 6, 8, Ignition Coil/Module 2, 4, 6, 8 (LD8), Ignition Control Module (ICM) (LZ9/LGD)
4	A/C CLTCH Fuse	10A	A/C CLTCH Relay 34
5	AIR SOL Fuse	15A	AIR SOL Relay 35
6	OXY SNSR Fuse	15A	Heated Oxygen Sensor (HO2S) 2, Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
7	EMIS DEV Fuse	15A	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1, Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 (LD8), Evaporative Emission (EVAP) Canister Purge Solenoid Valve, Heated Oxygen Sensor 1 (HO2S) (LZ9/LGD)
8	TRANS/IGN 1 Fuse	10A	Transmission Control Module (TCM), Automatic Transmission
9	ECM/PCM Fuse	10A	Engine Control Module (ECM)
10	HVAC/IPC IGN1 Fuse	10A	HVAC Control Module, Instrument Panel Cluster (IPC), Recirculation Actuator (C67)
11	AIRBAG Fuse	10A	Inflatable Restraint I/P Module Indicator, Inflatable Restraint Sensing and Diagnostic Module (SDM)
12	HORN Fuse	15A	Horn Assembly
13	WPR Fuse	25A	WPR PCB Relay, WPR HI PCB Relay
14	FOG LP Fuse	10A	Fog Lamp - Left Front, Fog Lamp - Right Front
15	RT HI BEAM Fuse	10A	Headlamp Assembly - Right Front
16	LT HI BEAM Fuse	10A	Headlamp Assembly - Left Front
17	LT LO BEAM Fuse	20A	Headlamp Assembly - Left Front
18	RT LO BEAM Fuse	20A	Headlamp Assembly - Right Front
19	WSW MTR Fuse	15A	Windshield Washer Fluid Pump
20	LF CRN LAMP Fuse	10A	Cornering Lamp - Left Front
21	RF CRN LAMP Fuse	10A	Cornering Lamp - Right Front
22	AIR PUMP Fuse	50A	AIR PUMP Relay 37
23	ABS Fuse	50A	Electronic Brake Control Module (EBCM)
24	STRTR Fuse	40A	Starter Motor
25	ABS MTR Fuse	60A	Electronic Brake Control Module (EBCM)
26	FAN 2 Fuse	30A	FAN 2 Relay 31
27	FAN 1 Fuse	30A	FAN 1 Relay 33
28	WSW/HTR Fuse	60A	Windshield Washer Solvent Heater
29	PWR/TRN Relay	-	ECM/CRNK Fuse 1, FUEL INJ ODD Fuse 2, FUEL INJ EVEN Fuse 3, OXY SNSR Fuse 6, EMIS DEV Fuse 7
30	STRTR Relay	-	STRTR Fuse 24
31	FAN 2 Relay	-	Cooling Fan - Right
32	FAN 3 Relay	-	Cooling Fan - Right
33	FAN 1 Relay	-	Cooling Fan - Left
34	A/C CLTCH Relay	-	A/C Compressor Clutch
35	AIR SOL Relay	-	Secondary Air Injection (AIR) Check Valve
36	IGN Relay	-	TRANS/IGN 1 Fuse 8, ECM/PCM Fuse 9, HVAC/IPC IGN1 Fuse 10, AIRBAG Fuse 11
37	AIR PUMP Relay	-	Secondary Air Injection (AIR) Pump
Printed Circuit Board (PCB) Relays - Not Serviceable
-	HORN PCB Relay	-	HORN Fuse 12
-	TRN/SIG PCB Relay	-	LF CRN LAMP Fuse 20
-	TRN/SIG PCB Relay	-	RF CRN LAMP Fuse 21
-	FOG LAMP PCB Relay	-	FOG LP Fuse 14
-	HIGH/BEAM PCB Relay	-	LT HIGH BEAM Fuse 16, RT HIGH BEAM Fuse 15
-	LO/BEAM PCB Relay	-	LT LO BEAM Fuse 17, RT LO BEAM Fuse 18
-	WSH PCB Relay	-	WSW MTR Fuse 19
-	WPR PCB Relay	-	Windshield Wiper Motor
-	WPR HI PCB Relay	-	Windshield Wiper Motor