1999-2003 Lexus RX300 (XU10) fuse box diagram

This article focuses on the first-generation Lexus RX (XU10), manufactured from 1999 to 2003. It provides fuse box diagrams for the Lexus RX 300 from 1999 to 2003, details the locations of the fuse panels inside the vehicle, and explains the function of each fuse.

Cigar lighter (power outlet) fuses in the Lexus RX300 are the fuses #24 “CIG” (Cigarette lighter) and #26 “PWR OUTLET” (Power outlets) in the Instrument panel fuse box.

Engine Compartment

№	Name	A	Description
2	TOWING	20	Trailer lights
3	H-LP R LWR	15	Right-hand headlight (low beam)
4	H-LP L LWR	15	Left-hand headlight (low beam)
5	HAZARD	15	Emergency flashers, Turn signal lights
6	AM2	20	Starting system
7	TEL	15	Telephone
8	FL DOOR	20	Power door lock system
9	SPARE	7.5	Spare fuse
10	SPARE	15	Spare fuse
11	SPARE	25	Spare fuse
12	ALT-S	7.5	Charging system
13	HORN	10	Theft deterrent system, Horn
14	EFI	20	Multiport fuel injection system/Sequential multiport fuel injection system
15	DOME	10	Interior light, Vanity lights, Foot lights, Rear personal light, Gauges and meters, Multi-display
16	ECU-B	7.5	Multiplex computer
17	RAD NO.1	25	Audio system
18	ABS 3	7.5	Anti-lock brake system
19	H-LP R UPR	15	Right-hand headlight (high beam)
20	H-LP L UPR	15	Left-hand headlight (high beam)
21	A/F HTR	25	Air fuel ratio sensor
46	ABS	60	Anti-lock brake system
47	ALT	140	Charging system
48	RDI	40	Cooling fan system
49	CDS	40	Cooling fan system
50	RR DEF	30	Rear window and outside rear view mirror defogger
51	HEATER	50	Blower
52	MAIN	50	Starting system

Relay Box

№	Name	A	Description
1	DRL	7.5	Daytime running light system

Passenger Compartment

№	Name	A	Description
22	IGN	7.5	SRS system, Multiport fuel injection/Sequential multiport fuel injection system
23	RADIO NO.2	7.5	Audio system, Multiplex computer
24	CIG	15	Cigarette lighter, Outside rear view mirrors, Power door lock system
25	D RR DOOR	20	Rear door lock, Rear power window
26	PWR OUTLET	15	Power outlets
27	FR FOG	15	Fog lights
28	SRS-IG	15	SRS system
29	ECU-IG	15	Telephone, Inside rear view mirror, Anti-lock brake system, Traction control system, Multi-display
30	WIPER	25	Windshield wipers
31	P RR DOOR	20	Rear door lock, Rear power window
32	P FR DOOR	20	Front door lock, Front power window
33	S/ROOF	20	Moon roof
34	HEATER	15	Air conditioning system
35	GAUGE	7.5	Multiplex computer, Service reminder indicators
36	RR WIP	15	Rear window wiper
37	STOP	20	Stop lights, High mounted stoplight, Anti-lock brake system, Traction control system
38	OBD	7.5	On-board diagnosis system
39	SEAT HTR	15	Seat heater system
40	STARTER	7.5	Starting system
41	WASHER	10/20	Washer
42	RR FOG	7.5	No circuit
43	FR DEF	20	Rear window and outside rear view mirror defogger
44	TAIL	10	Tail lights, Side marker lights, License plate lights, Parking lights
45	PANEL	7.5	Instrument panel lights
53	AM1	40	Ignition system
54	POWER	30	Power seats

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