2004-2009 Suzuki LT-Z250 Service Manual, Page 230Get this manual
ELECTRICAL SYSTEM
Step 1) Measure the resistance of the generator coil(!8-9) Is the resistance of generator coil OKYES NO Go to Step 5Faulty generator coil or disconnected lead wires
Step 1) Measure the generator no-load voltage(!8-9) Is the generator no-load voltage OKYES NO Go to Step 6Faulty generator