Lexus GS430 2006 Scheduled Maintenance Guide / LEXUS 2006 GS430/GS300 FROM JAN. 2006 PROD. OWNER'S MANUAL (OM30786U)

ELECTRICAL COMPONENTS
587
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
G64015
Engine compartment

ELECTRICAL COMPONENTS
588
64g104
Good Blown
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.
CAUTION
Always use a genuine Lexus fuse or equivalent for
replacement. Never install an ordinary wire even for
a temporary fix. This may cause extensive damage and
possibly a fire.
NOTICE
Before replacing the fuses, have the cause of electrical
overload determined and repaired by your Lexus dealer.

ELECTRICAL COMPONENTS
589
ADDING WASHER FLUID
If the washer tank becomes nearly empty, add washer
fluid.
You may use plain water as washer fluid. However, in cold
areas where temperatures range below the freezing point, use
washer fluid containing antifreeze. This product is available at
your Lexus dealer and most auto parts stores. Follow the
manufacturer’s directions for how much to mix with water.
NOTICE
Do not use engine antifreeze or any other substitute
because it may damage your vehicle’s paint.
CHECKING THE HEADLIGHT AIM
G64020
 1 Beam angle gauge
(horizontal movement for high beam)
2 Beam angle gauge
(vertical movement for high beam)
3 Beam angle gauge
(vertical movement for low beam)
4 Beam angle gauge
(horizontal movement for low beam)
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.

ELECTRICAL COMPONENTS
590
Adjusting the headlight aiming (low beam)
G64021
 1Adjusting bolt A
2Adjusting bolt B
G64022
 1Bubble 2Acceptable range
Vertical movement gauge: The bubble of the gauge should
not deviate from the center of the gauge by more than 2 marks
to either side of the gauge.
If the bubble is out of the acceptable range of the beam angle
gauge, adjust it using bolt A and B.

ELECTRICAL COMPONENTS
591
G64023
1. Turn the bolt A in either direction using a Phillips−head
screwdriver. At this time, k eep the turning direction and
number of turns in mind.
G64024
2. Turn the bolt B the same number of turns and in the same
direction as step 1 using a Phillips− head screwdriver.
If you do not know or cannot find the original position, or if you
feel that there is a large deviation, take the vehicle to your
Lexus dealer to adjust the headlight aim.
After adjusting the headlight in the vertical direction, check that
the light has been shifted from the adjusted position in the
horizontal direction.

ELECTRICAL COMPONENTS
592
Adjusting the headlight aiming (high beam)
G64025
 1Adjusting bolt A
2Adjusting bolt B
G64026
 1Bubble 2Acceptable range
Vertical movement gauge: The bubble of the gauge should
not deviate from the center of the gauge by more than 2 marks
to either side of the gauge.
If the bubble is out of the acceptable range of the beam angle
gauge, adjust it using bolt A.

ELECTRICAL COMPONENTS
593
G64027
Turn the bolt A in either direction using a Phillips−head
screwdriver.
64G084
 1 Red line 2Acceptable range
Horizontal movement gauge: The red line should not
deviate by more than 2 blue lines to either side of the gauge.
If the red line is out of the acceptable range of the beam angle
gauge, adjust it using bolt B.

ELECTRICAL COMPONENTS
594
G64028
Turn the bolt B in either direction using a Phillips−head
screwdriver.
If you do not know or cannot find the original position, or if you
feel that there is a large deviation, take the vehicle to your
Lexus dealer to adjust the headlight aim.
REPLACING LIGHT BULBS
The illustrations 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.
The tail lights, stop lights, high mounted stoplight and rear side
marker light consist of a number of LEDs. If any of the LEDs
burn out, take your vehicle to your Lexus dealer to have the
light replaced.
If two or more LEDs in a stoplight burn out, your vehicle may
not conform to local laws (SAE).
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.
 Do not touch the (Highintensity discharge
headlight’s) high voltage socket when the headlights
are turned on. An extremely high voltage of 20,000 V
will be discharged and could result in serious injury
or death by electric shock.

ELECTRICAL COMPONENTS
595
Do not attempt to take apart or repair the low beam
headlight bulbs, connectors, power supply circuits,
or related components. Doing so could result in elec-
tric shock and serious injury or death. Call your Lex-
us dealer for headlights repair or servicing, including
replacement of bulbs and bulb disposal.
NOTICE
Only use a bulb of the listed type.
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 pr oblem because the fogging is
caused by the temperature dif ference between the outside and
inside of the lens, just like the windshield fogs 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
G64017
Light Bulbs
Bulb No. W Type
1 Headlight (High beam) HB3 60 A
2 Parking light −−−5D
3 Front turn signal light −−−21 E
4 Headlight (Low beam) D4S 35 B
5 Front side marker light 194 5 D
6 Fog light HB4 51 C

ELECTRICAL COMPONENTS
596
G64018
Light BulbsBulb No. W Type
1 High mounted stoplight −−−3.6 G
2 Tail light −−−0.9/0.5 G
3 Tail/stop light −−−0.9/10.8 G
4 Trunk light −−−5F
5 Rear side marker light −−−0.5 G
6 Rear turn signal light −−−21 E
7 Back− up light 921 16 D
8 License plate light −−−0.85 G
G64019
Light Bulbs Bulb No. W Type
1 Front interior lights −−−0.1 G
2 Front seat spot lights −−−0.1 G
3 Vanity lights −−−8D
4 Rear seat spot lights −−−0.2 G
5 Door courtesy lights −−−0.2 G
6 Foot lights −−−0.2 G
7 Glove box light −−−0.2 G