1985-1987 Honda TRX 250 Fourtrax 250 Service Manual, Page 214Get this manual
BATIERYCHARGING SYSTEM
CHARGING SYSTEM
LEAKING TEST
Turn the ignition switch off and disconnect the negative cable from the batteryMeasure the voltage between the battery negative terminal and negative (ground) cableThere should be no voltage with the ignition switch off
CHARG ING OUTPUT TEST
(1 AMMETER
The battery voltage must be above 12.8 when perform-ing this t8StWarm up the engineRemove the main fuse and connect ammeter between the main fuse terminals+
Connect voltmeter between the battery terminals
(3) WIRE HARNESS SIDE
(4) STARTER RELAY SIDE
Be coreu nOf 10 conocl Ihe boiler)' cuble 0 the frame whilf-' testingBe sure 0 use the QITml'u which can be measured bolhe the (+) and (-) currentsStart the engine, turn the headlight on and read the ammeter and voltmeterGradually increase the engine speed and check that the amperage and voltage are regulated
REGULATE CURRENT: (+-1+) SA REGULATE VOLTAGE1315V