2003 Kawasaki KLF250 Service Manual., Page 253Get this manual
ELECTRICAL SYSTEM 16-11 Electrical Wiring
Wiring Inspection
Visually inspect the wiring for signs of burning, fraying, etcIf any wiring is defective, replace the damaged wiringPull each connector [A] apart and inspect for corrosion, dirt, and damageIf the connector is corroded or dirty, clean it carefullyIf it is damaged, replace itCheck the wiring for continuityUse the wiring diagram to find the ends of the lead which is suspected of being problemConnect the hand tester between the ends of the leads