Yamaha YB50 Service Manual page 153

• Place the main switch on "f".
• Place the switch "b" on position "c" or
"d".
• Check if there is a voltage (12 V) on the
"Chocolate" or "Dark Green" cable of the
bulb holder connector.
The circuit is in good condition.
4. The oil indicator light "OIL" does not light.
1. Bulb and bulb holder
• Check the bulb and bulb holder for conti-
nuity.
2.Oil level switch
• Remove the oil sump oil level switch.
• Connect the pocket tester (Ωx1) on the oil
level switch.
Cable (+) of tester
Cable (–) of tester
• Check the oil level measurer for continuity.
Switch Good
position condition
A Vertical
position
upwards
B Reverse
position
: Continuity
3. Voltage
• Connect the pocket tester (20 V DC) on
the bulb holder connector .
Cable (+) of tester
Cable (–) of tester
SATISFIES THE
SPECIFIED VALUE
(12 V)
CONTINUITY
Terminal
Terminal
Bad
condition
x x
x x
x: No continuity
GOOD CONDITION
Gray
Frame ground
SIGNALLING SYSTEM
OUTSIDE SPECIFIED VALUE
The connection circuit from the "TURN"
switch to the bulb holder connector is
defective, review.
NO CONTINUITY
Change the bulb and/or bulb receptacle.
POOR CONDITION
Change the oil level switch.
7-23
ELEC