1992-1998 Kawasaki PWC Jet Ski Service Repair Manual., Page 132Get this manual
CHARGING COIL TES
Obtain voltmeter and select the scale to register 50 voltsRemove the electrical box connectorDisconnect the pin connectorTemporarily connect the magneto leads, but not the charging coil Brown leadsStart the engine and advance the throttle to 6,000 rpinMake contactthe positive (Red) meter lead to one of the Brown charging coil leadsMake contact with the negative (Black) meter lead to the other charging coil Brown leadThe meter should indicate 50 volts as standard value, If the charging coil output is satisfactory, check the regulatorIf the charging coil output is low, check the charging coil resistance according to the following procedures
scaleMake contact with one meter lead to the Purple coil leadMake contact with the other meter lead to the Red coil leadThe meter should indicate 348.8523.2 ohmsNow, select the 10 meter scaleMake contact with one meter lead to the Yellow coil leadMake contact with the other meter lead to the Black coil leadThe meter should indicate 1.6- 32.4 ohmsIf the meter readings are not satisfactory, replace the coil