10.21
ELECTRICAL
10
RELAYS
Operation
The relays, located under the hood, assist with component
operation like the fan, fuel pump, and rear differential.
The differential relay, controlled by the AWD switch and ECU,
operates the differential solenoid.
The fan relay, controlled by the ECU and Temp Sensor, operates
the fan.
The power relay, controlled by the ECU, turns on power for
components such as the fuel pump, injectors, etc.
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REAR DIFF SOLENOID RELAY
COLOR FUNCTION
Red / White
Key-On battery power supply, switched on
by key switch, enables power to relay.
Brown Ground path for relay.
Orange / White
Key-On power supply, switched by relay,
provides power to Rear Diff Solenoid.
Brown / White
ECU ground input to connect relay Key-On
power to Rear Diff Solenoid output.
FAN RELAY
COLOR FUNCTION
Red / White
Key-On battery power supply, switched on
by key switch, enables power to relay.
Orange / Black
Fused 20-Amp power, switched by relay,
provides power to Fan Motor.
Yellow / Black
ECU input to connect relay Fused 20-Amp
power to Fan Motor output.
Red
Fused 20-Amp, constant battery power IN
supply for EFI component operation.
POWER RELAY
COLOR FUNCTION
Orange
Fused 15-amp, constant battery power IN
supply for EFI component operation.
Red / White
Key-On battery power supply, switched on
by key switch, enables power to relay.
Red / Black
EFI power output. Switched by relay when
ECU sends a signal on the GRY/W wire,
closing the relay. Supplies 15-amp power
for ECU-controlled operation of EFI
components.
Gray / White
ECU input to enable relay. The ECU
supplies a ground which closes the relay,
supplying power to run the fuel pump,
injectors, etc.
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