Polaris Outlaw 500, Service Manual

Page: 184 / 202

7.11
ELECTRICAL
7
COOLING SYSTEM
Fan Control Circuit Operation / Testing
The fan switch is located on the radiator. Power is supplied to the
fan switch via the Red / Black wire when the ignition key is
“ON”. When the fan switch reaches the specified temperature,
it becomes conductive and sends power to the fan motor through
to the Orange / Black wire. The ground path for the fan motor
is through the Brown harness wire.
The fan switch may not function or operation may be delayed if
coolant level is low or if air is trapped in the cooling system.
Verify the cooling system is full and purged of air. Refer to
Maintenance Chapter 2 for cooling system information
.
Coolant Temperature Sensor Test (Hot Light)
With the ignition switch (and engine stop switch) “ON”, power
is delivered to the hot light via the Red / White wire.
The Blue / White wire (ground) out of the light socket is
connected to the coolant temperature switch on the cylinder
head. In normal operating conditions, the temperature switch is
non–conductive (open). If engine coolant reaches the specified
temperature, the switch becomes conductive completing the
ground path for the light.
With engine cold, disconnect lead and measure resistance of
sensor between connector terminal and ground. There should be
no continuity or very high resistance (mega-ohms).
Fan Control Switch Bypass Test
1. Disconnect harness from fan switch on radiator.
2. Place a jumper wire between the Red / Blk and Org / Blk
wires in the connector.
3. With the parking brake on, turn the ignition key (and engine
stop switch) “ON”. The fan should start running.
4. If the fan runs with the jumper wire installed, check the fan
control switch and connector terminals. If the fan does not
run or runs slowly with the jumper wire installed, check the
fan motor wiring, ground, and motor condition (refer to Fan
Motor Current Draw). Repair or replace as necessary.
CAUTION
Keep hands away from fan blades during this
procedure. Serious personal
injury could result.
Hot Light On
221
o
F (105
o
C)