1999 Lexus GS300 light

SECTION 6 ± 4
429
SERVICE PROCEDURES AND
SPECIFICATIONS
Electrical components
Specifications 430. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking battery condition439 . . . . . . . . . . . . . . . . . . . . .
Battery recharging precautions446 . . . . . . . . . . . . . . . . .
Checking and replacing the blade type fuses448 . . . . .
Checking the cartridge type fuses453 . . . . . . . . . . . . . . .
Adding washer fluid455 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the headlight aim455 . . . . . . . . . . . . . . . . . . . . .
Replacing light bulbs459 . . . . . . . . . . . . . . . . . . . . . . . . . .

ELECTRICAL COMPONENTS
434
No.FUSEAMPERECIRCUIT
1 WASHER20Windshield washer
2 FR FOG15Fog lights
3 TAIL10Tail lights, Side marker lights,
License plate lights,
Parking lights
4 SRS±ACC15SRS
5 GAUGE10Back±up lights, Gauges and
meters, service reminder
indicators and buzzers
6 FUEL OPN10Fuel filler door opener
7 D FR
DOOR20Power window system,
Door lock system,
Wireless remote control
8 PANEL7.5Emergency flashers,
Headlight cleaner
9 HEATER10Air conditioning
10 SRS±B5Gauges and meters, service
reminder indicators and
warning buzzers
11 D P/SEAT30Power seat system
12 RADIO
NO.215Audio, Shift lock system
13 WIPER25Windshield wipers
14 OBD7.5On±board diagnosis

ELECTRICAL COMPONENTS
435
No.FUSEAMPERECIRCUIT
15 STOP15Stop lights,
Anti±lock brake system,
Traction control system
16 CIG15Cigarette lighter, Power outlet
17 ECU±IG15Power window, Door lock
system, Wireless remote
control, Theft deterrent system
18 STARTER5Starting system
19 IGN5
Multiport fuel injection
system/sequential multiport fuel
injection system, SRS,
Anti±lock brake system,
Vehicle skid control system,
Cruise control system
20 D RR
DOOR20Power window system,
Door lock system,
Wireless remote control
21 RR FOG10No circuit
22 M/R HTR10Outside rear view mirror
23 S/ROOF25Moon roof
24 P FR
DOOR20Power window system,
Door lock system,
Wireless remote control
25 P P/SEAT30Power seat system,
Tilt and telescopic steering

ELECTRICAL COMPONENTS
436
26 DOME10Interior lights, Personal lights,
Vanity lights, Trunk light, Clock
27 SEAT HTR20Seat heater
No.FUSEAMPERECIRCUIT
28 4WS25No circuit
29 TV15No circuit
30 ECU±B25Power seat system
31 P RR
DDOR20Power window system,
Door lock system,
Wireless remote control
32 ECU±B120
Power window system,
Door lock system,
Wireless remote control,
Theft deterrent system, Trunk
lid opener, Interior lights,
Personal lights, Clock,
Headlight cleaner
33 MPX±B10
Power window system,
Door lock system,
Wireless remote control,
Theft deterrent system,
Trunk lid opener
34 HORN10Horn
35 ETCS15Electronic throttle control
system
36 AM215Starting system, Multiport fuel
injection system/sequential
multiport fuel injection system

ELECTRICAL COMPONENTS
437
37 TEL15No circuit
38 TURN±HAZ10Turn signal lights
No.FUSEAMPERECIRCUIT
39 EFI25
Multiport fuel injection
system/sequential multiport fuel
injection system, Emission
control system
40 ALT±S5Charging system
41 RADIO
NO.120Audio
42 DRL NO.230Vehicles with daytime
running light system:
Daytime running light system
43 H±LP L
UPR10
Vehicles without daytime
running light system:
Left±hand headlight (high
beam)
44
H±LP R
UPR10
Vehicles without daytime
running light system:
Right±hand headlight (high
beam)
44
DRL NO.130Vehicles with daytime
running light system:
Daytime running light system
45 H±LP L
LW R15Left±hand headlight (low beam)
46 H±LP R
LW R15Right±hand headlight (low
beam)

ELECTRICAL COMPONENTS
438
47 H±LP R
UPR15
Vehicles with daytime
running light system:
Right±hand headlight (high
beam)
No.FUSEAMPERECIRCUIT
48 H±LP L
UPR15
Vehicles with daytime
running light system:
Left±hand headlight (high
beam)
SPARESpare fuse

ELECTRICAL COMPONENTS
440
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 least 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
454

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 by
your 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.