Electrical circuits of each system are shown from the power supply through ground
points. Wiring connections and their positions are shown and classified by code
according to the connection method. (Refer to the section, ”How to use this manual”).
* Only wiring information for complete circuits is included.

GROUND POINT

Shows ground positions of all parts described in this manual.

POWER SOURCE
(Current Flow Chart)

Describes power distribution from the power supply to various electrical loads.

CONNECTOR LIST

Describes the form of the connectors for the parts appeared in this book.
This section is closely related to the system circuit.

BRZ (G4400GE)

*The information in this manual is
about the wire harnesses.
Information about component and
assembly parts is for reference,
but in some cases this reference
information might not be included or
might differ from the actual vehicle.
When inspecting or repairing a vehicle,
refer to the relevant Repair Manual.

Component parts

Wire harness

Assembly parts

Example:

Front right door

When inspecting or repairing,

refer to the Repair Manual.

HOW TO USE THIS MANUAL B

This manual provides information on the electrical circuits installed on vehicles by
dividing them into a circuit for each system.

The actual wiring of each system circuit is shown from the point where the power
source is received from the battery as far as each ground point. (All circuit
diagrams are shown with the switches in the OFF position.)

When troubleshooting any problem, first understand the operation of the circuit
where the problem was detected (see System Circuit section), the power source
supplying power to that circuit (see Power Source section), and the ground points
(see Ground Point section).

When the circuit operation is understood, begin troubleshooting of the problem
circuit to isolate the cause. Use Relay Location and Electrical Wiring Routing
sections to find each part, junction block and wiring harness connectors, wiring
harness and wiring harness connectors and ground points of each system circuit.
Internal wiring for each junction block is also provided for better understanding of
connection within a junction block.
Wiring related to each system is indicated in each system circuit by arrows
(from__, to__). When overall connections are required, see the Overall Electrical
Wiring Diagram at the end of this manual.

BRZ (G4400GE)

[B]

W – R

G – W

Skid Control ECU

Assembly

G – W

– G

Combination Meter

R – L

Rear Lights

R – L

(S/D)

(W/G)

G – B

W – B

Rear Combination Light

W – B

Rear Combination Light

W – B

G – R

Stop

G – R

– R

Stop Light

(BAT)

15A
STOP

(IG)

7.5A
GAUGE

[A]

H6
Stop Light Switch

G – W

[D]

[C]

[E]

[F]

[O]

[G]

[M]

H4
Light Failure Sensor

15 CH1

CH1

[J]

[I]

[N]

[K]

[L]

[H]

H17
Center Stop
Light Assembly

(Shielded)

HJ1

W – B

G – R

HJ1

Assembly

Assembly RH

Assembly LH

B HOW TO USE THIS MANUAL

* The system shown here is an EXAMPLE ONLY. It is different to the actual

circuit shown in the SYSTEM CIRCUITS SECTION.

BRZ (G4400GE)

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