1999 Lexus LS400 fuses

INTRODUCTION
393
Checking brake fluid
Parts (if level is low):

FMVSS No. 116 DOT 3 or SAE J1703 brake fluid
Tools:

Funnel (only for adding fluid)
Checking power steering fluid
Parts (if level is low):

Automatic transmission fluid DEXRON
II or III
Tools:

Rag or paper towel

Funnel (only for adding fluid)
Checking battery condition
Non±maintenance batteries
Tools:

Warm water

Baking soda

Grease

Conventional wrench (for terminal clamp bolts)
Maintenance type batteries Parts (if level is low):


Distilled water
Tools:

Warm water

Baking soda

Grease

Conventional wrench (for terminal clamp bolts)

Coin (for vent plugs)

Funnel (only for adding distilled water)
Checking and replacing the blade type
fuses
Parts (if replacement is necessary):

Fuse with same amperage rating as original
Checking the cartridge type fuses
Parts (if replacement is necessary):

Genuine Lexus fuse or equivalent with same
amperage rating as original

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
435
64L006±2

1Engine compartment
2Driver's side instrument panel
± FUSES

ELECTRICAL COMPONENTS
453
CHECKING AND REPLACINGTHE BLADE TYPE FUSES
64L011-1

Driver's side instrument panel
64L012-2

ELECTRICAL COMPONENTS
454

Engine compartment 1Spare fuses
2Pull±out tool
1. Turn the ignition switch off and open the fuse box
lid.
Determine which f
use may be causing the problem. The
lid of the fuse box shows the name of the circuit for each
fuse.
64L013
2. Make sure the inoperative component is turned
off. Pull the suspected fuse straight out with the
pull±out tool and check it. If it has blown, push a new
fuse into the clips.

ELECTRICAL COMPONENTS
455
64L064

Good
Blown
a. Look carefully at the fuse. If the thin wire 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.
b. Only install a fuse with the amperage rating
designated on the fuse box lid.
If you do not have a spare fuse, in an emergency you can
pull out the ºRADIO NO.1º ºMIR±HTRº or ºOBDº fuse,
which may be dispensable for normal driving, 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. 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.

ELECTRICAL COMPONENTS
457
CHECKING THE CARTRIDGETYPE FUSES
64L016-3

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.