1998 Lexus GS300 Electrical Components

ELECTRICAL COMPONENTS
411
38 TURN±HA
Z10Turn 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 sold in Canada:
Daytime running light system
43 H±LP L
UPR10Vehicles sold in U.S.A.:
Left±hand headlight (high beam)
44
H±LP R
UPR10Vehicles sold in U.S.A.:
Right±hand headlight (high beam)
44
DRL NO.130Vehicles sold in Canada:
Daytime running light system
45 H±LP L
LW R15Left±hand headlight (low beam)
46 H±LP R
LW R15Right±hand headlight (low beam)
47 H±LP R
UPR15Vehicles sold in Canada:
Right±hand headlight (high beam)

ELECTRICAL COMPONENTS
412
48 H±LP L
UPR15Vehicles sold in Canada:
Right±hand headlight (high beam)
SPARESpare fuse

ELECTRICAL COMPONENTS
413
CHECKING BATTERY
CONDITION
Precautions
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
414
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.Checking battery exterior
64G001

ELECTRICAL COMPONENTS
415

1
Terminals 2
Hold±down clamp
Check the battery for corroded or loose connections,
cracks, or loose hold±down clamps.
1. 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.
2. If the connections are loose, tighten the clamp bolts ± but
do not overtighten.
3. Tighten the hold±down clamp only enough to keep the
battery firmly in place. Overtightening may damage the
battery case.NOTICE
Make sure the engine and all accessories are turned
off before performing maintenance.
When checking the battery, remove the ground cable
first and reinstall it last.
Be careful not to cause a short circuit with tools.
Take care no solution gets into the battery when
washing it.
Checking battery fluid
There are 2 types of batteries: maintenance type and
non±maintenance type.
A non±maintenance battery has ºMAINTENANCE FREE
BATTERYº on its top. A maintenance type battery does not
have such indication.
Maintenance type battery
Check the fluid condition by the fluid level lines on the side
of the battery. Or if the battery has a hydrometer on its top,
you can also check the hydrometer.
Non±maintenance battery
Check the battery condition by the hydrometer on the top of
the battery.

ELECTRICAL COMPONENTS
416(a) Checking by the fluid level lines (Maintenance type
battery only)
64G002

1
Upper line 2
Lower line
The fluid (electrolyte) level must be between the upper
and lower lines.
When checking the fluid level, look at all six cells, not just one
or two.
If the level is lower than the lower line, add distilled water.
(See ºAdding distilled waterº on page 418.)(b) Checking by the hydrometer

ELECTRICAL COMPONENTS
417
64G003
Check the battery condition by the hydrometer color.
Maintenance type battery
1
BLUE ± Good condition.
2
WHITE ± Charging necessary. Have the battery
checked by your Lexus dealer.
3
RED ± Add distilled water. (See ºAdding distilled
waterº on page 418.)
Non±maintenance type battery
1
BLUE ± Good condition.
2
WHITE ± Charging necessary. Have the battery
checked by your Lexus dealer.
3
RED ± Have the battery checked by your Lexus dealer.
NOTICE
For non±maintenance battery:
Do not refill the battery with water.

ELECTRICAL COMPONENTS
418
Adding distilled water
(Maintenance type battery only)
64L062

1
Low 2
O.K.
1. Remove the vent plugs.
2. Add distilled water to cells needing fluid.
If the side of your battery is covered, check the water level by
looking down directly above the cell as illustrated above.
3. Retighten the vent plugs securely.
NOTICE
Do not overfill the cells. Excess electrolyte could
squirt out of the battery during heavy charging,
causing corrosion or damage.
Use a cover on the battery for longer life.