Yamaha WR250R Service Manual page 343

Headlight relay
3
4
2
1
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity
(between "3" to "4")
Checking the turn signal relay
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
a. Check:
Turn signal relay input voltage
G
Off specification →Repair wire harness con-
nection failure from main switch to turn signal
relay coupler
Turn signal relay input voltage
DC 12V
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
a. Connect the pocket tester (DC 20 V) to the
turn signal relay terminal.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Tester positive probe
Red/Blue "1"
Negative tester probe
Ground
ELECTRICAL COMPONENTS
b. Turn the main switch to "ON".
c. Measure turn signal relay applied voltage.
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d. Check:
Turn signal relay output voltage
G
Out of specification → Replace the defective
part (s).
Turn signal relay output voltage
DC 12V
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
a. Connect the pocket tester (DC 20 V) to the
turn signal relay terminal.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Tester positive probe
Brown/White termnals "1"
Negative tester probe
Ground
b. Turn the main switch to "ON".
c. Measure turn signal relay applied voltage.
LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
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1
1