2003 Suzuki LT-Z400 Factory Service Manual, Page 276Get this manual

2003 Suzuki LT-Z400 Factory Service Manual, Page 276

SERVICING INFORMATION ELECTRICAL Complaint No sparking or poor sparkingSymptom and possible causes 1Defective ignition coil2Defective
valve stem oil seal1 Incorrect spark plug 2Overheated engine3Loose spark plug4Excessively lean airfuel mixtureGenerator does
not charge 1 Open or short in lead wires, or loose lead connections 2Shorted, grounded or open generator coil3Shorted or
punctured regulatorrectifierGenerator charges but charging rate is below specificationGenerator overchargesUnstable charging
Starter button does not work 1 Lead wires tend to get shorted, open-circuited, or loosely connected at terminal2Grounded
or open-circuited stator coils or generator3Defective regulatorrectifier1Internal short-circuit in the battery2Damaged or
defective regulatorrectifier1Lead wire insulation frayed due to vibration, resulting in intermittent shorting2Internally
shorted generator3Defective regulatorrectifier1Run down battery2Defective switch contact3Brushes do not seat properly on
the commutator in the starter motor4Defective starter relay5Defective neutral relay6Defective engine stop switch7Defective