Yamaha YFM250RX 2008 Service Manual page 283

EBS01052
4. Starting circuit cut-off relay
• Remove the starting circuit cut-off relay
from the wire harness.
• Connect the pocket tester (Ω × 1) and bat-
tery (12 V) to the starting circuit cut-off relay
as shown.
Positive battery terminal → red/black
Negative battery terminal →
sky blue
Positive tester probe → red/black
Negative tester probe → yellow/black
• Does the starting circuit cut-off relay have
continuity between red/black and yellow/
black?
YES
ELECTRIC STARTING SYSTEM
or black/yellow
NO
Replace the starting
circuit cut-off relay.
7-16
EBS01053
5. Starting circuit cut-off relay (diode)
• Remove the starting circuit cut-off relay
from the wire harness.
• Connect the pocket tester (Ω × 1) to the
starting circuit cut-off relay as shown.
• Measure the starting circuit cut-off relay for
continuity as follows.
Positive tester probe →
sky blue
Negative tester probe →
red/black
Positive tester probe →
red/black
Negative tester probe →
sky blue
NOTE: NOTE:
When you switch the tester's positive and
negative probes, the readings in the above
chart will be reversed.
• Are the testing readings correct?
YES
ELEC
Continuity
No
continuity
NO
Replace the starting
circuit cut-off relay.