Yamaha YJ50RAP Service Manual page 213

EAS00802
5. The oil level warning light fails to come on.
1. Oil level warning light bulb and socket
• Check the oil level warning light bulb and
socket for continuity.
Refer to "CHECKING THE SWITCHES".
• Are the oil level warning light bulb and
socket OK?
YES
2. Oil level switch
• Remove the oil level switch from the oil
tank.
• Connect the pocket tester (Ω × 1) to the oil
level switch.
Positive tester probe → terminal 1
Negative tester probe → terminal 2
1
2
3
• Check the oil level switch for continuity.
• Hold the oil level switch in an upright posi-
È
and let the float 3 go all the way
tion
É
down .
• Is the oil level switch OK?
YES
NO
Replace the oil level
warning light bulb,
socket or both.
NO
Replace the oil level
switch.
SIGNALING SYSTEM
3. Diode
• Remove the diode from the wire harness.
• Connect the pocket tester (Ω × 1) to the
diode terminals as shown.
• Check the diode for continuity as follows.
Tester positive probe →
Tester negative probe →
Tester positive probe →
Tester negative probe →
NOTE:
When you switch the tester's positive and
negative probes, the readings in the above
chart will be reversed.
• Are the tester readings correct?
7 - 36
ELEC
gray 1
gray/black 2
gray/black 1
gray 2
1
Gy
Gy/B
2
YES
Replace the diode.
– +
Continu-
ity
No Con-
tinuity
NO