Yamaha YBR125ED 2005 Service Manual page 281

EAS00761
4. Starter relay
• Remove the starter relay.
• Connect the pocket tester (Ω × 1) and bat-
tery (12 V) to the starter relay terminals as
shown.
Positive battery terminal → blue/white 1
Negative battery terminal → blue/white 2
Positive tester probe → red 3
Negative tester probe → black 4
1
• Does the starter relay have continuity
between red and black?
YES
ELECTRIC STARTING SYSTEM
2
4
3
NO
Replace the starter
relay.
EAS00760
5. Diode
• Remove the diode from the coupler.
• Connect the pocket tester (Ω × 1) to the
diode terminals as shown.
• Measure the diode for continuity as fol-
lows.
NOTE:
The pocket tester readings are shown in the
following table.
Positive tester probe →
Negative tester probe →
Positive tester probe →
Negative tester probe →
• Are the testing readings correct?
7 - 15
ELEC
sky blue 1
Continuity
blue/white 2
blue/white 2
No conti-
nuity
sky blue 1
1
Sb
L/W
2
YES
Replace the diode.
– +
NO