Lexus SC300 / Lexus SC400. Manual — part 217
WIRING AND CONNECTOR DIAGRAMS
Turn Signal and Hazard Warning Lights
BE–66
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BODY ELECTRICAL SYSTEM
Lighting System
Parts Replacement (Turn Signals)
(Cornering Light)
REPLACEMENT OF CORNARING LIGHT
1.
REMOVE CORNARING LIGHT
(a) Disconnect negative (–) terminal from the battery.
CAUTION: Work must be started after approx. 20 se-
conds or longer from the time the ignition switch is
turned to the ”LOCK” position and negative (–) terminal
cable is disconnected from the battery.
(b) Remove front under cover. (See page
)
(c) Remove a screw and two nuts.
(d) Remove cornaring light from bumper.
(e) Disconnect
connector.
2.
INSTALL CORNARING LIGHT
For installation follow the removal procedure in reverse.
(Front Turn Signal Light)
REPLACEMENT OF FRONT TURN
SIGNAL LIGHT
(See page
HINT: Replacement of Headlight (LO–Beam)
(Rear Combination Light)
(See page
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BODY ELECTRICAL SYSTEM
Lighting System
BE–67
Parts Inspection (Turn and Hazard)
(Combination Switch Assembly)
(See page
HINT: Inspect turn signal light switch.
(Turn Signal Flasher)
REMOVAL AND INSTALLATION OF TURN
SIGNAL FLASHER
(See page
INSPECTION OF TURN SIGNAL
FLASHER
INSPECT TURN SIGNAL FLASHER
(Operation)
LHD Side
(a) Connect
the positive (+) lead from the battery to terminal
1 and the negative (–) lead to 4.
(b) Connect the two turn signal light bulbs parallel to each
other to terminals 3 and 4, check that bulbs flash.
RHD Side
(c) Connect
the positive (+) lead from the battery to terminal
1 and the negative (–) lead to 2.
(d) Connect
two turn signal light bulbs parallel to each other
to terminals 2 and 5, check that the bulbs flash.
HINT: The turn signal lights should flash 60 to 120 times per
minute.
If one of the front or rear turn signal lights has an open circuit,
the number of flashes will be more than 140 per minute.
If operation is not as specified, replace the flasher.
(Flasher Circuit)
(See page
(HAZARD WARNING SWITCH)
REMOVAL AND INSTALLATION OF
HAZARD WARNING SWITCH
1. REMOVE
INSTRUMENT
PANEL
NO.2
REGISTER
ASSEMBLY
(See page
2.
REMOVE HAZARD WARNING SWITCH
Remove two screws and hazard warning switch from register.
3.
INSTALL HAZARD WARNING SWITCH AND REGISTER
For installation, follow the removal procedure in reverse.
BE–68
–
BODY ELECTRICAL SYSTEM
Lighting System
INSPECTION OF HAZARD WARNING
SWITCH
INSPECTION HAZARD WARNING SWITCH
(Continuity)
Inspect the switch continuity between terminals.
If continuity is not as specified, replace the switch.
(Switch Circuit)
Disconnect the switch connector and inspect the connection
on the wire harness side as shown.
Check for
Tester connection
Condition
Specified value
Voltage
8–Ground
Constant
Battery positive voltage
10–Ground
Ignition switch position
LOCK or ACC
No voltage
10–Ground
Ignition switch position
ON
Battery positive voltage
*
1
2–Ground
Light control switch position
OFF
No voltage
*
1
2–Ground
Light control switch position
TAIL or HEAD
Battery voltage
Continuity
*
1
3–Ground
Constant
Continuity
5–Ground
Constant
*
2
Continuity
6–Ground
Constant
*
2
Continuity
*1
: Illumination
*2
: There is resistance because this circuit is grounded through the bulb.
If the circuit is not as specified, refer to
and inspect the circuits connected to other parts.
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BODY ELECTRICAL SYSTEM
Lighting System
BE–69
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