10.28
ELECTRICAL
9924096 - 2013 RANGER RZR XP 900 / RZR XP 4 900 Service Manual
© Copyright 2012 Polaris Sales Inc.
CHARGING SYSTEM
Current Draw - Key Off
Connect an ammeter in series with the negative battery
cable. Check for current draw with the key off. If the draw
is excessive, loads should be disconnected from the
system one by one until the draw is eliminated. Check
component wiring as well as the component for partial
shorts to ground to eliminate the draw.
Charging System “Break Even” Test
The “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 battery. Depending on
battery condition and system load, the break even point
may vary slightly. The battery should be fully charged
before performing this test.
1. Using an inductive amperage metering device, (set to
DC amps) connect to the negative battery cable.
2. With engine off, key switch and lights in the on
position, the ammeter should read negative amps
(battery discharge).
3. Shift transmission into park and start the engine. With
the engine running at idle, observe meter readings.
4. Increase engine RPM while observing ammeter and
tachometer. Note the RPM at which the battery starts
to charge (ammeter indication is positive).
5. With lights and other electrical loads off, the “break
even” point should occur at approximately 1500 RPM
or lower.
6. With the engine running, turn the lights on and
depress the brake pedal to keep brake lights on.
7. Repeat test, observing ammeter and tachometer.
With lights on, charging should occur at or below 2000
RPM.
Do not connect or disconnect the battery cable
or ammeter with the engine running. Damage will
occur to electrical components.
Current Draw - Key Off:
Maximum of .01 DCA (10 mA)
Current Draw Inspection
Key Off
Do not allow the battery cables to become
disconnected with the engine running. Follow the
steps below as outlined to reduce the chance of
damage to electrical components.
Never start the engine with an ammeter
connected in series. Damage to the meter or
meter fuse will result.
Do not run test for extended period of time.
Do not run test with high amperage accessories.
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