Yamaha CW50L Service Manual page 93

TROUBLESHOOTING LIGHTING SYSTEM INSPECTION
1. Headlight, headlight indicator or meter light do not work.
I THE HEADLIGHT, HEADLIGHT INDICATOR, TAlL LIGHT OR METER I
LIGHT DO NOT WORK I 1. Bulb and socket I NO CONTINUITY
I
I
NOTE: I " Check the bulb and socket for continuity.
Remove the following parts before proceeding with the troubleshooting:
• Mole and footrest board J_
• Handlebar covers _#- CONTINUITY I Replace bulb or socket. I
For accurate troubleshooting use the following special tools:
2. Voltage _ '-_I;_ "
I_:_1 Pocket tester: I ............ _;--1 _
90890-03112 Connect the pocket tester (AC20V) to the
headlight coupler. %____4_, ili]i -
Headlight:
1. "HI/LO" switch I NO CONTINUITY • "LO":
I
Pocket tester (+) lead _ Green 0
I Refer to "SWITCH INSPECTION". Pocket tester (-) lead _ Black (_) _
• "HI":
,_y CONTINUITY I Replace left handlebar switch. I • HeadlightP°cketP°cket tester (+) lead _ Yellow (_)testerindicator (') lead: _ Black (_) _(_ _': __.
2. Lighting coil resistance Pocket tester (+) lead -* Yellow (_)
f
• Disconnect the lighting coil coupler from the Pocket tester (-) lead _ Black (_ __
wire ms --r
Connect the pocket tester (_ x 1) to the Pocket tester (+) lead _ Blue (_)
lighting coil. R Pocket tester (-) lead -=, Black (_)
Check the lighting coil resistance • Start the engine, _ _,,
Tester (+) lead _ Yellow I Red (D "_'_ • Switch from "HI" to "LO" and back.
Tester (-) lead _ Ground (_) • Check the voltage (12V) between the head-
light coupler leads.
Lighting coil resistance:
0.32 ~ 0.48_ ( at 20°C (68°F) OUT OF SPECIFICATION "_ SPECIFICATIoNMEETS ,IWidng circuit between C.D.I magneto and I
I socket connector isfaulty _ Repair.
I
CORRECT I The circuit is good. I
I Replace lighting coil. I
4. Connections I
• Check all connections inthe lighting system. POOR CONNECTIONS
Refer to "CIRCUIT DIAGRAM".
CORRECT
i Repair, I
Check condition of each circuit for lighting
system.
Refer to "LIGHTING SYSTEM CHECK".
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