1999 Lexus LS400 light

CHASSIS
431
REPLACING WHEELS
When to replace your wheels
If you have wheel damage such as bending, cracks
or heavy corrosion, the wheel should be replaced.
If you fail to replace damaged wheels, a tire may slip off
a wheel or they may cause loss of handling control.
Replacement with used wheels is not recommended as
they may have been subjected to rough treatment or
high mileage and could fail without warning. Also, bent
wheels which have been straightened may have hidden
structural damage and therefore should not be used.
Never use an inner tube in a leaking wheel which is
designed for a tubeless tire.
Wheel selection
When replacing wheels, care should be taken to
ensure that they are equivalent to those removed in
load capacity, diameter, rim width, and offset.
Correct replacement wheels are available at your Lexus
dealer.
A wheel of a different size or type may adversely affect
handling, wheel and bearing life, brake cooling,
speedometer/odometer calibration, stopping ability,
headlight aim, bumper height, vehicle ground clearance,
and tire or snow chain clearance to the body and
chassis.
ALUMINUM WHEEL PRECAUTIONS
 After driving your vehicle the first 1600 km (1000
miles), check that the wheel nuts are tight.
 If you have rotated, repaired, or changed your tires,
check that the wheel nuts are still tight after driving
1600 km (1000 miles).
 When using tire chains, be careful not to damage the
aluminum wheels.
 Use only the Lexus wheel nuts and wrench designed
for your aluminum wheels.
 When balancing your wheels, use only Lexus
balance weights or equivalent and a plastic or rubber
hammer.
 As with any wheel, periodically check your aluminum
wheels for damage. If damaged, replace
immediately.

SECTION 6 ± 4
434
SERVICE PROCEDURES AND
SPECIFICATIONS
Electrical components
Specifications434
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking battery condition 443
. . . . . . . . . . . . . . . . . . . . .
Battery recharging precautions 451
. . . . . . . . . . . . . . . . .
Checking and replacing the blade type fuses 453 . . . . .
Checking the cartridge type fuses 457
. . . . . . . . . . . . . . .
Adding washer fluid 459
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the headlight aim 459
. . . . . . . . . . . . . . . . . . . . .
Replacing light bulbs 462
. . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS
± FUSE LOCATIONS

ELECTRICAL COMPONENTS
439
No.FUSEAMPERECIRCUIT
1 TURN7.5Turn signal lights
2 WIPER20Windshield wipers
3 HEATER10
Air conditioning system,
Rear window defogger,
Multiport fuel injection
system/sequential multiport fuel
injection system
4 FR FOG15Fog lights
5 ECU±IG10Power steering control system,
Charging system,
Vehicle skid control system
6 PWR±IG15
Automatic headlight leveling
system, Moon roof,
Headlight cleaner,
Power seat switch,
Tilt and telescopic steering,
Shift lock system
7 GAUGE10
Gauges and meters, service
reminder indicators and
warning buzzers,
Back±up lights,
Vehicle skid control system,
Multiport fuel injection
system/sequential multiport fuel
injection system, Automatic
transmission system
8 IGN10SRS, Multiport fuel injection
system/sequential multiport fuel
injection system

ELECTRICAL COMPONENTS
440
9 RR FOG7.5No circuit
10 FUEL OPN10Fuel opener system
No.FUSEAMPERECIRCUIT
11 RR CIG15Rear cigarette lighter,
Power outlet
12 FR CIG15Front cigarette lighter, SRS
13 A/C7.5Air conditioning system
14 P RR
DOOR20Rear door lock,
Rear power window
15 STOP LP25Stop lights,
High mounted stop light
16 RADIO NO.215
Audio system,
Outside rear view mirror,
Shift lock system,
Air conditioning system
17 PANEL7.5Instrument panel lights,
Air conditioning system, Glove
box light, Audio system
18 STARTER7.5
Starting system,
Automatic transmission system,
Multiport fuel injection
system/sequential multiport fuel
injection system
19 TAIL7.5Tail lights, Side marker lights,
License plate lights

ELECTRICAL COMPONENTS
441
20 STOP±S7.5
Shift lock system,
Height control system,
Anti±lock brake system,
Vehicle skid control system
21 RR S/HTR15No circuit
22 WASHER20Windshield washer
No.FUSEAMPERECIRCUIT
23 AIR SUS20Height control system
24 D RR
DOOR20Rear door lock,
Rear power window
25 HORN10Horns
26 ETCS15Electronic throttle control
system
27 H±LP L UPR10Left±hand headlight (high
beam)
28 H±LP R UPR10Right±hand headlight (high
beam)
29 EFI NO.210Emission control system
30 MIR±HTR15Outside rear view mirror
defogger
31 FR S/HTR15Seat heater
32 ALT±S7.5Charging system
33 TEL15Telephone
34 CRT15Multi information display

ELECTRICAL COMPONENTS
442
35 RADIONO.120Audio system
36 MPX±B10Power window, Door lock,
Tilt and telescopic steering
37 ECU±B7.5Vehicle skid control system,
Daytime running light system
38 HAZ10Emergency flashers
No.FUSEAMPERECIRCUIT
39 EFI NO.120Multiport fuel injection
system/sequential multiport fuel
injection system
40 DOME10Interior light, Vanity lights,
Foot lights, Rear personal light,
Garage door opener
41 OBD7.5On±board diagnosis system
42 DRL10Daytime running light system
43 H±LP R LW R15Right±hand headlight (low
beam)
44 H±LP LLW R15Left±hand headlight (low beam)

ELECTRICAL COMPONENTS
444
CAUTION
BATTERY PRECAUTIONS
The battery produces flammable and explosive
hydrogen gas.
Do not cause a spark by contacting the battery
terminals with tools.
 Do not smoke or light a match near the battery.
The electrolyte contains poisonous and corrosive
sulfuric acid.
 Avoid contact with eyes, skin or clothes.
 Never inhale or swallow electrolyte.
 Wear protective safety glasses when working near
the battery.
 Keep children away from the battery.
EMERGENCY MEASURES
 If electrolyte gets in your eyes, flush your eyes with
clean water for at l east 15 minutes and get immediate
medical attention. If possible, continue to apply
water with a sponge or cloth while traveling to the
medical office.

ELECTRICAL COMPONENTS
458

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.
NOTICE
Before replacing the fuses, have the cause of
electrical overload determined and repaired byyour Lexus dealer.
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.