Yamaha XT660R S Service Manual page 403

EAS00759
4. Relay unit (starting circuit cut-off relay)
• Disconnect the relay unit from the wire
harness.
• Connect the pocket tester (Ω × 1) and bat-
tery (12 V) to the relay unit terminals as
shown.
Positive battery terminal → red/black 1
Negative battery terminal → black/yellow 2
Positive tester probe → blue/white 3
Negative tester probe → blue/black 4
• Does the starting circuit cut-off relay have
continuity between blue/white and blue/
black?
YES
EAS00760
5. Relay unit (diode)
• Disconnect the relay unit from the wire
harness.
• Connect the pocket tester (Ω × 1) to the
relay unit terminals as shown.
• Measure the diode for continuity as fol-
lows.
ELECTRIC STARTING SYSTEM
NO
Replace the relay
unit.
http://manuals.magnamaniac.com
Positive tester probe →
Negative tester probe →
Positive tester probe →
Negative tester probe →
Positive tester probe →
Negative tester probe →
Positive tester probe →
Negative tester probe →
Positive tester probe →
Negative tester probe →
Positive tester probe →
Negative tester probe →
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?
8 - 20
ELEC
sky blue 1
black/yellow 2
sky blue 1
Continuity
blue/yellow 3
blue/green 4
blue/yellow 3
black/yellow 2
sky blue 1
blue/yellow 3
No conti-
nuity
sky blue 1
blue/yellow 3
blue/green 4
YES
Replace the
unit.
– +
NO
relay