Checking The Diodes; Headlight/Radiator Fan Motor/Turn Signal Relays - Yamaha YZF-R25 Service Manual

Headlight relay
L/B
R/Y Y/B
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity
(between "3" and "4")
Radiator fan motor relay
L
G/Y
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity
(between "3" and "4")
Turn signal relay
1. Positive battery lead
2
1
ELECTRICAL COMPONENTS
2. Negative battery lead
Result
Relay operate → OK
Relay do not operate → Re-
place.
EAS30555

CHECKING THE DIODES

1. Check:
• Diodes
Out of specification → Replace.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
TIP
The pocket tester or the analog pocket tester
readings are shown in the following table.
8-86