12.26
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
4. Shift transmission into park and start the engine.
With the engine running at idle, observe meter
readings.
5. Increase engine RPM while observing ammeter and
tachometer.
6. Note RPM at which the battery starts to charge
(ammeter indication is positive).
7. With lights and other electrical loads off, the “break
even” point should occur at approximately 1500 RPM
or lower.
8. With the engine running, turn the lights on and apply
the brake to keep brake light on.
9. Repeat test, observing ammeter and tachometer.
With lights on, charging should occur at or below
2000 RPM.
CHARGING SYSTEM ALTERNATOR
TESTS
Three tests can be performed using a multimeter to
determine the condition of the stator (alternator).
TEST 1: Resistance Value of Each Stator Leg
1. Measure the resistance value of each of the three
stator legs: Y1 to Y2, Y1 to Y3, and Y2 to Y3.
2. Each test should measure: 0.15 Ω ± 20%
TEST
CONNECT
METER
LEADS TO:
OHMS
READING
Battery Charge
Coil
Y1 to Y2
Less than 1 Ω
Battery Charge
Coil
Y1 to Y3
Less than 1 Ω
Battery Charge
Coil
Y2 to Y3
Less than 1 Ω
NOTICE
If there are any significant variations in ohm readings
between the three legs it is an indication that one of the
three stator legs maybe weak or failed.
TEST 2: Resistance Value of Each Stator Leg to
Ground
3. Measure the resistance value of each of the stator
legs to ground: Y1 to Ground, Y2 to Ground, Y3 to
Ground.
ELECTRICAL
To Next Page
Loading...
Need help?
General
