Lexus RX 300 (XU10) (1999-2003) Fuse Diagram


Fuse box diagram (fuse layout), location, and assignment of fuses Lexus RX 300 (XU10) (1999, 2000, 2001, 2002, 2003).

Lexus RX 300 (XU10) (1999-2003)

Checking and Replacing Fuses

The fuses are designed to blow, protecting the wiring harness and electrical systems from damage. If any of the electrical components do not operate, a fuse may have melted. If this happens, check and replace the fuses as necessary. Look carefully at the fuse. If the thin wire inside is broken, the fuse has blown. If you are not sure or if it is too dark to see, try replacing the suspected fuse with one of the same value that you know is good.

In case if you do not have a spare fuse, in an emergency you can pull out fuses, which may be dispensable for normal driving (for example, audio system, cigarette lighter, OBD, seat heater, and the like), and use it if its amperage rating is the same. If you cannot use one of the same amperage, use one lower than, but as close as possible to, the amperage. If the amperage is lower than that specified, the fuse might blow out again but this does not indicate anything wrong. Be sure to get the correct fuse as soon as possible and return the substitute to its original clips.


  • Always switch off the ignition system and the affected electrical circuit before replacing a fuse.
  • Never use a fuse of a higher amperage rating than that indicated, or use any other object in place of a fuse, even as a temporary fix. This can cause extensive damage or even fire.
  • If the replaced fuse blows again, have the vehicle inspected by any authorized Lexus dealer or repairer, or another duly qualified and equipped professional.



  1. Engine compartment box #1
  2. Engine compartment box #2
  3. Driver’s side instrument panel

Passenger Compartment Fuse Box Diagram

The fuse box is located behind the cover to the left of the steering column.

Passenger Compartment Fuse Box Location

Passenger Compartment Fuse Box Diagram

22IGN7.5SRS system, Multiport fuel injection/Sequential multiport fuel injection system
23RADIO №27.5Audio system, Multiplex computer
24CIG15Cigarette lighter, Outside rear view mirrors, Power door lock system
25D RR DOOR20Rear door lock, Rear power window
26PWR OUTLET15Power outlets
27FR FOG15Fog lights
28SRS-IG15SRS system
29ECU-IG15Telephone, Inside rear view mirror, Anti-lock brake system, Traction control system, Multi-display
30WIPER25Windshield wipers
31P RR DOOR20Rear door lock, Rear power window
32P FR DOOR20Front door lock, Front power window
33S/ROOF20Moon roof
34HEATER15Air conditioning system
35GAUGE7.5Multiplex computer, Service reminder indicators
36RR WIP15Rear window wiper
37STOP20Stop lights, High mounted stoplight, Anti-lock brake system, Traction control system
38OBD7.5On-board diagnosis system
39SEAT HTR15Seat heater system
40STARTER7.5Starting system
41WASHER101999: Washer
202000-2003: Washer
42RR FOG7.5No circuit
43FR DEF20Rear window and outside rear view mirror defogger
44TAIL10Tail lights, Side marker lights, License plate lights, Parking lights
45PANEL7.5Instrument panel lights
53AM140Ignition system
54POWER30Power seats


Engine Compartment Fuse Box №1

Engine Compartment Fuse Box №1 Location

Engine Compartment Fuse Box №1 Diagram

1DRL7.5Daytime running light system

Engine Compartment Fuse Box №2

Engine Compartment Fuse Box №2 Location

  1. Pull-out tool
  2. Spare fuse

Engine Compartment Fuse Box №2 Diagram

2TOWING20Trailer lights
3H-LP R LWR15Right-hand headlight (low beam)
4H-LP L LWR15Left-hand headlight (low beam)
5HAZARD15Emergency flashers, Turn signal lights
6AM220Starting system
8FL DOOR20Power door lock system
9SPARE7.5Spare fuse
10SPARE15Spare fuse
11SPARE25Spare fuse
12ALT-S7.5Charging system
13HORN10Theft deterrent system, Horn
14EFI20Multiport fuel injection system/Sequential multiport fuel injection system
15DOME10Interior light, Vanity lights, Foot lights, Rear personal light, Gauges and meters, Multi-display
16ECU-B7.5Multiplex computer
17RAD №125Audio system
18ABS 37.5Anti-lock brake system
19H-LP R UPR15Right-hand headlight (high beam)
20H-LP L UPR15Left-hand headlight (high beam)
21A/F HTR25Air fuel ratio sensor
46ABS60Anti-lock brake system
47ALT140Charging system
48RDI40Cooling fan system
49CDS40Cooling fan system
50RR DEF30Rear window and outside rear view mirror defogger
52MAIN50Starting system