10.29
ELECTRICAL
10
9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
© Copyright 2011 Polaris Sales Inc.
RELAYS
Operation
The relays, located under the front storage box, assist with
component operation such as the fan, fuel pump, etc.
The fan relay, controlled by the ECU, operates the fan.
(C
arbureted model also utilizes a fan relay)
The ECU relay, controlled by the key switch, operates the
ECU
The Ignition Coil and Fuel Pum
p relay, controlled by the
ECU, turns on power for components such as the fuel
pump, injectors, etc.
FAN RELAY
COLOR FUNCTION
Red (EFI / Carb)
10-amp breaker protected,
unswitch
ed FAN power supply.
Yellow /Black (EFI)
Brown (Carb)
Y/B - Fan 'ON' Command.
G
round is supplied by the ECU,
closing the relay to turn on the
fan.
BN - Ground
Red / White (EFI / Carb)
Key ‘ON’ 12 Vdc power supply,
s
witched on by the key and LH
control switches, enables
power to relay.
Orange / Black (EFI)
Red / Black (Carb)
O/B - Fan 12 Vdc supply,
s
witched on by the ECU,
enables power to fan.
R/B - 12 Vdc to fan switch
ECU RELAY
COLOR FUNCTION
Red/White
KEY-ON Battery power supply,
switch
ed on by the key and LH control
switches, enables power to relay.
Gray/Black
Relay “ON” command. The ECU
su
pplies a ground which closes the
relay, supplying power to run the fuel
pump, injectors, etc.
Red
Fused 15-amp, unswitched battery
power
IN supply for EFI component
operation.
Red/Black
EFI power output. 'ON' when ECU
se
nds a signal on the GRY/W wire,
closing the relay. Supplies 15-amp
power for ECU-operation of EFI
components.
IGNITION COIL/FUEL PUMP RELAY
COLOR FUNCTION
Orange/Green
Fused 15A power supply, switched on
by
the key and LH control switches,
enables power to relay.
Gray/White
Relay “ON” command. The ECU
su
pplies a ground which closes the
relay, supplying power to run the fuel
pump, injectors, etc.
Red/White
Fused 20-amp, switched battery power
IN supp
ly for EFI component operation.
Red/Dark
Green
Power output. 'ON' when ECU s
ends a
signal on the GRY/W wire, closing the
relay. Supplies power for ECU-
controlled operation of EFI
components.
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