Yamaha YJ125S, Service Manual, Page: 256 / 294

7-18
- +
ELEC
EAS00761
5. Starter relay
8
Disconnect the starter relay coupler from
the coupler.
8
Connect the pocket tester (
Ω ×
1) and
battery (12 V) to the starter
8
relay coupler as shown.
Positive battery terminal
J J
J J J
red/white
1 1 1 1 1
Negative battery terminal
J J J J J
blue/white
2 2 2 2 2
Positive tester probe
J J
J J
J
red
3 3
3 3 3
Negative tester probe
J J J J J
red
4 4 4 4 4
8
Does the starter relay have continuity be-
tween red
3
and red
4
?
YES NO
EAS00749
6. Main switch
8
Check the main switch for continuity.
Refer to “CHECKING THE SWITCHES”.
8
Is the main switch OK?
YES NO
Replace the starter
relay.
Replace the main
switch.
EAS00751
7. Brake light switch(front and rear)
8
Check the brake light switch for continu-
ity.
Refer to “CHECKING THE SWITCHES”.
8
Is the brake light switch OK?
YES NO
Replace the brake light
switch.
1
3
4
2
L/W
R/W
Starter
relay
ELECTRIC STARTING SYSTEM
EAS00750
8. Engine stop switch
8
Check the engine stop switch for conti-
nuity.
Refer to “CHECKING THE SWITCHES”.
8
Is the engine stop switch OK?
YES NO
Replace the right
handlebar switch.
EAS00752
9. Sidestand switch
8
Check the sidestand switch for continu-
ity.
Refer to “CHECKING THE SWITCHES”.
8
Is the sidestand switch OK?
YES NO
Replace the sidestand
switch.
EAS00764
10.Start switch
8
Check the start switch for continuity.
Refer to “CHECKING THE SWITCHES”.
8
Is the start switch OK?
YES NO
Replace the right
handlebar switch.