Yamaha DT200L 1984-1988 Service Manual page 194

ELEC
LIGHTING SYSTEM
Troubleshooting
If the lighting system should become in-
operative, the troubleshooting aids will be
useful.
Check bulb conditions of headlight,
meter light and taillight.
OK
Check entire lighting system for
connection (Refer to "WIRING
DIAGRAM" section.)
OK
Check voltage of A. C. lighting
circuit (Refer to "A. C. Lighting
Circuit Output Test" section.)
If other
than specified
Check lighting coil resistance of
CDI magneto (Refer to "Lighting
Coil Resistance Test" section.)
OK
Rectifier with regulator is faulty,
repalce it.
Poor
condition
Poor
connection
Replace bulb(s).
Correct.
OK
If other
than
specified
Lighting system is good.
Replace lighting coil.
A. C. Lighting Circuit Output Test
1. Remove:
• Headlight lens unit
2. Disconnect:
• 3-pin connector (Yellow, Green and
Black) (from wire harness)
3. Connect:
• Pocket Tester (90890-03104)
Set the tester selector to "AC20V"
position.
4. Start the engine.
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