low lexus LS400 1994 Repair Manual Information / 1994 LS400: ELECTRICAL COMPONENTS

ELECTRICAL COMPONENTS
221
NO.FUSEAMPERECIRCUIT
18RADIO
NO. 120Radio, cassette tape player,
compact disc player, power antenna
19HAZ-HORN15Emergency flashers, horns
20DOME10
Interior light, personal lights, door
courtesy lights, ignition switch light,
open door warning light, trunk
room light, electric moon roof
system, radio cassette tape player,
compact disc player, preset
steering system, seat belt warning
system, air conditioning system,
inside rear view mirror, door lock
and theft deterrent system foot
light, power rear view mirror,
locking, with wireless remote
control system, automatic light
control system
21TEL15Telephone
22EFI20Multiport fuel injection system
23SEAT HTR20Seat heater
24AIRSUS20Lexus ride control system, height
control system
25DRL10Vehicles sold in Canada
Daytime Running Light System
26
HEAD LH15Vehicles sold in U.S.A.
Left-hand headlight
HEAD
LH-LWR10Vehicles sold in Canada
Left-hand headlight (low beam)
NO.FUSEAMPERECIRCUIT
27
HEAD RH15Vehicles sold in U.S.A.
Right-hand headlight
HEAD
RH-LWR10Vehicles sold in Canada
Right-hand headlight (low beam)
28HEAD
LH-UPR15Vehicles sold in Canada
Left-hand headlight (high beam)
29HEAD
RH-UPR15Vehicles sold in Canada
Right-hand headlight (high beam)
NO.CIRCUIT
BREAKERAMPERECIRCUIT
30P/W30
Preset steering, power shoulder
anchor, electric moon roof, power
windows
31DOOR30
Theft deterrent system, seat
control system, fuel opener
control system
32DEFOG40Rear window defogger

ELECTRICAL COMPONENTS
222
CHECKING BATTERY CONDITION
AND FLUID LEVEL
CAUTION:
BATTERY PRECAUTIONS
The battery produces a 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 en route to the medical
office.
If electrolyte gets on your skin, thoroughly wash the
contacted area. If you feel a pain or burn, get medical
attention immediately.

If electrolyte gets on your clothes, there is a possibility
of its soaking through to your skin, so immediately take
off the exposed clothing and follow the procedure
above, if necessary.

If you happen to swallow electrolyte, drink a large
quantity of water or milk. Follow with milk of magnesia,
beaten raw egg or vegetable oil. Then go immediately
for emergency help.
Extended maintenance
interval batteryHold-down clamp
Terminals
1. Check the battery for corroded or loose connections,
cracks, or loose hold-down clamps.
a. If the battery is corroded, wash it off with a solution of warm
water and baking soda. Coat the terminals with grease to
prevent further corrosion.

ELECTRICAL COMPONENTS
225 Determine which fuse may be causing the problem. The lid of
the fuse box shows the name of the circuit for each fuse.
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.
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. Install only a fuse with the amperage rating designated on
the fuse box lid.
GoodBlown
If you do not have a spare fuse, in an emergency you can pull
out the “CIG”, “RADIO”, “DOME” or “HEATER” 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.
CAUTION:
Never use a fuse with a higher amperage rating, or another
object, in place of a fuse. This may cause extensive
damage and possibly a fire.

ELECTRICAL COMPONENTS
228
6. Install a new wiper blade to the wiper arm.
7. Slide the wiper blade upward fully to the wiper arm.
8. Firmly close the lock joining the wiper arm and blade.
9. Lower the wiper blade down with your hand. Return the
wiper blades to set position.
NOTICE:
Be careful not to scratch the glass surface with the wiper
frame.

ELECTRICAL COMPONENTS
230
5. Place the new wiper blade square to the wiper arm and push
it onto the wiper arm.
6. Slide the wiper blade back up until the lock clicks in place.
NOTICE:
Be careful not to scratch the glass surface with the wiper
frame.
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
manufacture’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.

ELECTRICAL COMPONENTS
231
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:
Halogen bulbs have pressurized gas inside and require
special handling. They can burst or scatter 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.
NOTICE:
Only use a bulb of the listed type.
Light BulbsBulb No.WType
HeadlightsHB260 / 55A
Fog lightsH355B
Parking lights—5D
Front side marker lights1943.8D
Front turn signal lights115627C
Rear turn signal lights115627C
Stop and tail lights115727 / 8C
Back-up lights115627C
High mounted stoplight92118D
License plate lights—5D
Light BulbsBulb No.WType
Interior light—10F
Personal lights—8C
Glovebox light—1.2D
Door courtesy lights1943.8D
Footlights—1.4D
Vanity lights—3E
Trunk light1943.8D
A : HB2 halogen bulbs
B : H3 halogen bulbs
C : Single end bulbs
D : Wedge base bulbs
E : Double end bulbs