Yamaha YZ125 2022, Owner'S Service Manual, Page: 22 / 278

BASIC SERVICE INFORMATION
1-10
EAM20120
BASIC SERVICE INFORMATION
EAM30181
ELECTRICAL SYSTEM
Checking the electrical system
NOTICE
ECA14371
Never insert the tester probes into the cou-
pler terminal slots. Always insert the probes
from the opposite end “a” of the coupler, tak-
ing care not to loosen or damage the leads.
NOTICE
ECA16640
For waterproof couplers, never insert the
tester probes directly into the coupler. When
performing any checks using a waterproof
coupler, use the specified test harness or a
suitable commercially available test har-
ness.
Checking the connections
Check the leads, couplers, and connectors for
stains, rust, moisture, etc.
1. Disconnect:
•
Lead
• Coupler
•
Connector
NOTICE
ECA16780
• When disconnecting a coupler, release the
coupler lock, hold both sections of the cou-
pler securely, and then disconnect the cou-
pler.
• There are many types of coupler locks;
therefore, be sure to check the type of cou-
pler lock before disconnecting the coupler.
NOTICE
ECA16790
When disconnecting a connector, do not pull
the leads. Hold both sections of the connec-
tor securely, and then disconnect the con-
nector.
2. Check:
• Lead
•
Coupler
• Connector
Moisture

Dry with compressed air.
Rust/stains

Connect and disconnect sev-
eral times.
3. Check:
• All connections
Loose connection

Connect properly.
a