2007 Lexus GS450h maintenance

409
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Luggage compartment 
(vehicles with active stabilizer suspension system)
FuseAmpereCircuit
1STB FR50Front stabilizer
2STB RR30Rear stabilizer
3STB DC/DC30DC/DC converter
■After a fuse is replaced
●If the lights do not turn on even afte r the fuse has been replaced, a bulb may
need replacement. ( P. 4 1 3 )
●If the replaced fuse blows again, have the vehicle inspected by your Lexus
dealer.
■If there is an overload in the circuits
The fuses are designed to blow before th
e entire wiring harness is damaged.

410
4-3. Do-it-yourself maintenance
CAUTION
■To prevent system breakdowns and vehicle fire
●Observe the following precautions.
Failing to do so may cause damage, and possibly a fire or injury.
●Never use a fuse of a higher amperage rating than indicated, or use any other
object in place of a fuse.
●Always use a genuine Lexus fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix. 
This can cause extensive damage or even fire.
●Do not modify fuses or the fuse box.
NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus
dealer.

411
4-3. Do-it-yourself maintenance
4
Maintenance and care
Headlight aim
■Adjustment bolts
For high beam
For low beam
■ Ga
uges
Vertical movement gauges
Horizontal movement
gauges
■ Befor
e checking the headlight aim
Make sure the vehicle has a full ta nk of gas and the ar
ea around
the headlight is not deformed.
Park the vehicle on level ground.
Sit in the driver’s seat.
Bounce the vehicle several times.STEP1
STEP2
STEP3
STEP4

412
4-3. Do-it-yourself maintenance
■Adjusting the headlight aim
While watching the gauges, use
a Phillips-head screwdriver to
turn each adjustment the bolt so
that for vertical adjustment the
bubble is in the center of the
gauge, and for horizontal
adjustment the gauge reads “0”.
If you feel that there is a large
deviation, take the vehicle to
your Lexus dealer to adjust the
headlight aim.

413
4-3. Do-it-yourself maintenance
4
Maintenance and care
Light bulbs
You may replace the following bulbs yourself. For more information about
replacing other light bulbs, contact your Lexus dealer.
■Prepare a replacement light bulb.
Check the wattage of the light bulb being replaced. ( P.
4 8 8 )
■ R
emove the engine compartment cover if necessary.
 P.
3 6 2
■ F
ront bulb locations
■Rear bulb locations
Parking light
Headlight high beam
Rear turn signal light Back-up light

414
4-3. Do-it-yourself maintenance
Replacing light bulbs
■Headlight high beam
Unplug the connector while push-
ing the lock release.
Turn the bulb base counterclock -
wise to remove it.
STEP1
STEP2

415
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Parking light
Turn the bulb base counterclock-
wise.
Remove the light bulb.
■ B
ack-up light
Open the trunk lid. Remove the
trunk handle and panel co
ver clips.
Partly remove the trunk panel
co
ver and turn bulb bases coun -
terclockwise.
STEP1
STEP2
STEP1
STEP2

416
4-3. Do-it-yourself maintenance
Remove the light bulb.
■ R
ear turn signal light
Open the trunk lid and remove the
co
ver.
Turn the bulb base counterclock -
wise.
Remove the light bulb.
STEP3
STEP1
STEP2
STEP3