Yamaha YFM7FGPW Service Manual page 425

EBS01054
6. Rear brake relay
• Remove the rear brake relay from the wire
harness.
• Connect the pocket tester (Ω × 1) and bat-
tery (12 V) to the rear brake relay as
shown.
Positive battery terminal →
Negative battery terminal → black 2
Positive tester probe → black/yellow 3
Negative tester probe → black 4
2
1
/Y
Y/W
B B
• Does the rear brake relay have continuity
between black/yellow and black?
YES
ELECTRIC STARTING SYSTEM
yellow/white 1
4
3
NO
Replace the rear
brake relay.
9 - 20
EBS01053
7. Diode 2
• Remove the diode 2 from the wire har-
ness.
• Connect the pocket tester (Ω × 1) to the
diode 2 as shown.
• Measure the diode 2 for continuity as fol-
lows.
NOTE:
_
The pocket tester 90890-03112 and the ana-
log pocket tester YU-03112-C readings are
shown in the following table.
Positive tester probe →
black/yellow 1
Negative tester probe →
sky blue 2
Positive tester probe →
black/yellow 1
Negative tester probe →
blue/black 3
Positive tester probe →
sky blue 2
Negative tester probe →
black/yellow 1
Positive tester probe →
blue/black 3
Negative tester probe →
black/yellow 1
2
Sb L/B
B/Y
• Are the testing readings correct?
YES
– +
ELEC
Continuity
Continuity
No
continuity
No
continuity
1
3
NO
Replace the diode 2.