1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 352Get this manual
IG NITION SYSTEM With thigniti on co i.mary re connected, connect the peak voltag,e adaptor or peak volta,ge tester to th ignition coilCONNECTION: Blstl(Yeliow terminalBodV ground (+1
IGNITION COIL
PEAK VOLTAGE
ADAPTER
Turn the engine stop switch toRUN "
Crank the engine with the starter motor and read ignition coil primary pea,k voltagePEAK VOLTAGE: 100 minimum
If the peak voltage is abnormal:, check for an open circuit or poor connect ion in BlacWYeUow ireIf no defects are found in the harnessrefer to the troubl'eshooting chart on page 18-3
IGNITION PULSE GENERATOR PEAK VOLTAGE