2004 Lexus IS300 headlight

ELECTRICAL COMPONENTS
377
No.FUSEAMPERECIRCUIT
26 MPX-B10
Power window system,
Air conditioning,
Gauges and meters,
Theft deterrent system
27 P RR P/W20Power window system
28 SRS-B7.5SRS system, Door lock system
29 TV7.5Television
30 OBD7.5On-board diagnosis system
31 IGN7.5
SRS system,
Multiport fuel injection
system/sequential multiport fuel
injection system,
Cruise control system
32 ECU-B120
Theft deterrent system,
Door lock system,
Interior light, Trunk light,
Vanity light, Ignition switch light,
Map light, Door courtesy lights,
Power window system,
Air conditioning,
Gauges and meters
33 ALT-S7.5Charging system
34 ETCS15Electronic throttle control
system
35 AM220
Starting system, SRS system,
Multiport fuel injection
system/sequential multiport fuel
injection system, Cruise control
system
36 HORN10Horn
No.FUSEAMPERECIRCUIT
37 RADIONO.120Audio
38 TURN-HAZ15Turn signal lights
39 EFI25
Multiport fuel injection
system/sequential multiport fuel
injection system,
Emission control system,
Engine immobilizer system
40 DRL NO.230Daytime running light system
41 DRL NO.17.5Daytime running light system
42 H-LP L LW R15Left-hand headlight
(low beam), Fog lights
43 H-LP R LW R15Right-hand headlight
(low beam)
44 ABS27.5Anti-lock brake system
45 SPARESpare fuse
46 SPARESpare fuse
47 SPARESpare fuse
48 H-LP LUPR10Left-hand headlight
(high beam)
49 H-LP R UPR10
Right-hand headlight
(high beam),
Service reminder indicators and
buzzers
03 07.09

ELECTRICAL COMPONENTS
383
It is a good idea to purchase a set of spare fuses and keep them
in your vehicle for emergencies.
If the new fuse immediately blows out, there is a problem with
the electrical system. Have your Lexus dealer correct it as
soon as possible.
CAUTION
Never use a fuse with a higher amperage rating, or any
other object, in place of a fuse. This may cause
extensive damage and possibly a fire.
CHECKING THE CARTRIDGE TYPE
FUSES
SV64005

1Good 2Melted
If the headlights or other electrical components do not
work and the blade type fuses are O.K., check the
cartridge type fuses. If any of the cartridge type fuses are
blown, they must be replaced.
If there is an overload in the circuits from the battery, the fuses
are designed to blow before the entire wiring harness is
damaged.
03 07.09

ELECTRICAL COMPONENTS
385
CHECKING THE HEADLIGHT AIM
SV64027

1Vertical movement adjusting bolt 1
2Vertical movement adjusting bolt 2
Before checking the headlight aim:
1. Be sure that the body around the headlight is not deformed.
2. Park the vehicle on a level spot.
3. The driver gets into the driver's seat and puts the vehicle in
a state readying for a driving (with a full tank).
4. Bounce the vehicle several times.
Adjusting the vertical aiming
SV64051
1. Turn the vertical movement adjusting bolt 1 in either
direction. At this time, keep the turning direction and number
of turns in mind.
03 07.09

ELECTRICAL COMPONENTS
386
SB64028
2. Turn the vertical movement adjusting bolt 2 the same
number of turns and in the same direction as step 1.
REPLACING LIGHT BULBS
The illustration on the following pages show the locations of
light bulbs. If it is necessary to replace a bulb, take your vehicle
to your Lexus dealer as soon as possible. Use bulbs with the
bulb numbers and wattage ratings given in the table.
CAUTION
 To prevent burning yourself, do not replace the light
bulbs while they are hot.
 Halogen bulbs have pressurized gas inside and
require special handling. They can burst or shatter if
scratched or dropped. Hold a bulb only by its plastic
or metal case. Do not touch the glass part of a bulb
with bare hands.
Vehicles with discharge headlightsÐ
 Do not touch the high voltage socket when the
headlight turns on. 20000 V is momentarily generated
and may cause severe injury by electric shock.
 Do not disassemble, repair or take apart the headlight
bulbs, connector, power supply circuits and rotated
components. Or you may be injured by electric
shocks. Call your dealer when the headlights fail to
work or have to be replaced or disposed of.
NOTICE
Only use a bulb of the listed type.
03 07.09

ELECTRICAL COMPONENTS
387
The inside of the lens of exterior lights such as headlights may
temporarily
fog up when the lens becomes wet in the rain or in
a car wash. This is not a problem because the fogging is
caused by the temperature dif ference between the outside and
inside of the lens, just like the windshield fogged up in the rain.
However, if there is a large drop of water on the inside of the
lens, or if there is water pooled inside the light, contact your
Lexus dealer. LIGHT LOCATION
SV64032
Light Bulbs
Bulb No. W Type
1Headlights (High beam) HB3 60 A
2Parking lights 168 5 E
3Headlights (Low beam) D2R 35 B
4Front fog lights --- 55 C
5Front turn signal lights --- 21 D
6Front side marker lights 194 3.8 E
03 07.09