2005 Polaris Sportsman 700/800 EFI Service Manual, Page 275Get this manual
ELECTRICAL
CHARGING SYSTEM "BREAK EVEN" TEST
CAUTION: Do not allow the battery cables to become disconnected with the engine runningFollow the steps below as outlined to reduce the chance of damage to electrical componentsThe "break even" point of the charging system is the point at which the alternator overcomes all system loads (lights, etc and begins to charge the batteryDepending on battery condition and system load, the break even point may vary slightlyThe battery should be fully charged before performing this testWARNING: Never start the engine with an ammeter connected in seriesDamage to the meter or meter fuse will resultDo not run test for extended period of timeDo not run test with high amperage accessories1Connect tachometer to the engine2Using an inductive amperage metering device, (set to DC amps) connect to the negative battery cable 3With engine off and the key, kill switch, and lights in the ON position, the ammeter should read negative amps (battery discharge)Reverse meter lead if positive reading is indicated4Shift transmission into Park and start the engineWith the engine running at idle, observe meter readings5Increase engine RPM while observing ammeter and tachometer6Note RPM at which the battery starts to charge (ammeter indication is positive)7With lights and other electrical loads off, the "break even" point should occur at approximately 1500 RPM or lower8With the engine running, turn the lights on and engage parking brake lock to keep brake light on9Repeat test, observing ammeter and tachometerWith lights on, charging should occur at or below 2000 RPM