Yamaha YW50AP Service Manual page 170

5. Pickup coil resistance
8 Disconnect the pickup coil coupler from
the wireharness.
8 Connect the pocket tester (Ω × 100) to the
pickup coil terminal.
Tester (+) lead→White/Red lead 1
Tester (-) lead→White/Blue 2
8 Check the pickup coil for specificated re-
sistance.
Pickup coil resistance:
248~ 372 Ω at 20°C (68°F)
(White/Red-White/Blue)
6. Source resistance
8 Disconnect the source coil coupler from
the wireharness.
8 Connect the pocket tester (Ω × 100) to the
source coil terminal.
Tester (+) lead→Black/Red lead 1
Tester (–) lead→Green/White 2
8 Check the source coil for specificated re-
sistance.
Source coil resistance:
640 ~ 960 Ω at 20°C (68°F)
(Black/Red - Green/White )
7. Main switch
Refer to "CHECKING SWITCHS" section.
*
MEET
SPECIFICATION
MEET
SPECIFICATION
CONTINUITY
*
IGNITION SYSTEM
OUT OF SPECIFICATION
Pickup coil is faulty, replace it.
OUT OF SPECIFICATION
Source coil is faulty, replace it.
NO CONTINUITY
Main switch is faulty, replace it.
7-12
– +
ELEC
BR
GW
Or
CDI
Magneto
WL WR
B
1
2
1
2
BR
GW
Or
CDI
Magneto
WR
WL
B