Polaris RANGER 1000 2020, Service Manual, Page: 279 / 610

4
9850045 R01 - 2020-2021 RANGER 1000 Service Manual
© Copyright Polaris Inc.
4.33
FAN CONTROL CIRCUIT OPERATION /
TESTING
Power is supplied to the fan via the Orange/Black wire
when the relay is ON. The ground path for the fan motor
is through the Brown harness wire. Refer to Relay
operation for more information on fan functions.
CAUTION
Keep hands away from fan blades during operation.
Serious personal injury could result.
NOTICE
The fan may not function or operation may be delayed if
coolant level is low or if air is trapped in the cooling
system. Be sure cooling system is full and purged of air.
FAN CONTROL CIRCUIT BYPASS TEST
NOTICE
Most vehicles support the output state feature Digital
Wrench®. The fan can also be commanded on and off
from this feature. This is another test that can be used
prior to the circuit bypass test.
1. Disconnect harness from coolant temperature sensor
on the engine cylinder head. Refer to ECT Sensor
Replacement page 4.24 procedure.
2. With the transmission in Park, start the engine. After
a few seconds, the fan should start running and the
“CHECK ENGINE” indicator should display on the
instrument cluster. This indicates all other
components are working properly.
3. If the fan does not run or runs slowly, check the fan
motor wiring, ground, motor condition, circuit breaker
and mechanical relay for proper operation. Repair or
replace as necessary.
4. If the fan runs with the sensor harness disconnected,
but will not turn on when the engine is hot, check the
coolant temperature sensor and connector terminals.
ENGINE ELECTRICAL