Acura RL (1996-2004 year). Instruction — page 66

71-2

Brake System Indicator Light

See Ground Distribution,
page 14-7.

See Gauge
Assembly,
page 80-5 or 80-9.

YEL

YEL

See Ground
Distribution,
page 14-6.

C331

PHOTO 75
VIEW 66

See Power Distribution,
page 10-10.

GRN/RED

Brake/
park
input

(PARK)

VSA
MODULATOR/
CONTROL
UNIT

PHOTO 182
VIEW 127

UNDER-HOOD
FUSE/RELAY
BOX

PHOTO 33

GAUGE
ASSEMBLY

PHOTO 71
(’00-’03)
PHOTO 212
VIEW 113

See Power Distribution,
page 10-10.

PARKING
BRAKE SWITCH
Closed with parking
brake applied.

PHOTO 81

C307

PHOTO 37
VIEW 47

1

2

RED/YEL

17

GRN/

RED

11

UNDER-DASH
FUSE/RELAY
BOX

PHOTO 75

A

C502

PHOTO 77
VIEW 83

GRN/RED

G301

PHOTO 31

C321

PHOTO 39

GRN/WHT

C322

PHOTO 39

BRAKE FLUID
LEVEL SWITCH
Closed with low
fluid level.

PHOTO 39

See Ground
Distribution,
page 14-7.

See Gauge
Assembly

14

C331

PHOTO 75
VIEW 66

BLK

FUSE 13

METER
7.5A

FUSE 55

METER
15A

’00-’04

GAUGE
RELAY

PHOTO 27

3

1

5

2

UNDER-
HOOD
RELAY
BOX C

PHOTO 23

GRN/WHT

1

C405

PHOTO 74
VIEW 60

GRN/

RED

Brake/
park
input

IMMOBILIZER
CONTROL
UNIT

PHOTO 84
VIEW 98

7

A

38

UNDER-DASH
FUSE/RELAY
BOX

PHOTO 75

WHT/RED

WHT/RED

22

A

G301

PHOTO 31

BLK

GRN/RED

BLK

BLK

GRN/RED

Brake/
park
input

DRIVER’S
MULTIPLEX
CONTROL
UNIT

PHOTO 79
VIEW 114

16

C

C421

(Terminals
17-20)

PHOTO 88
VIEW 78

UNDER-
DASH
FUSE/
RELAY
BOX

PHOTO 75

See Gauge
Assembly

GRN/RED

See
Head-
lights

C414

PHOTO
83
VIEW
91

2

DAYTIME
RUNNING
LIGHTS
CONTROL
UNIT

PHOTO 150
VIEW 65

6

13

GRN/RED

C409

PHOTO
79
VIEW 61

10

GRN/

RED

5

GRN/RED

B

C504

PHOTO
83
VIEW 68

3

GRN/

RED

GRN/

RED

36

VSA
MODULATOR/
CONTROL
UNIT

PHOTO 182
VIEW 127

Canada

GRN/RED

(BFL)

HOT IN ON OR START

HOT AT ALL TIMES

BRAKE
SYSTEM
INDICATOR
LIGHT

*

*

= ’04 indicators are LEDs

2004 American Honda Motor Co., Inc.

Circuit Index

Circuit Index

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How the Circuit Works

How the Circuit Works

+

71-3

Brake System Indicator Light

How the Circuit Works

The brake system indicator light comes on to
alert the driver that the parking brake is applied,
or that the brake fluid level is low. It also comes
on as a bulb test when the engine is cranked.

Parking Brake

With the ignition switch in ON (II) or START (III),
voltage is applied through fuse 13 to the gauge
relay. The gauge relay then applies battery
voltage through fuse 55 to the brake system
indicator light. When you apply the parking brake,
the switch closes and provides a ground for the
light, and the light comes on to remind the driver
that the parking brake is applied.

Brake Fluid Level

The brake system indicator receives battery
voltage through fuse 55 and the gauge relay. If
the brake fluid level is low, the brake fluid level
switch closes, providing ground to the circuit. The
brake system indicator light then comes on,
alerting the driver to a low brake fluid level in the
master cylinder. (Check brake pad wear before
adding fluid.)

Bulb Check

With the ignition switch in ON (ll) and the engine
not running, the alternator applies a ground signal
to the WHT/BLU wire to turn on the brake system
indicator light as a bulb check.

Refer to the Service Manual (Section 23, Electrical)
for specific tests or troubleshooting procedures.

2004 American Honda Motor Co., Inc.

Circuit Index

Circuit Index

Menu

Menu

72

Engine Oil Pressure Indicator Light

See Ground
Distribution,
page 14-12.

BLK

18

ENGINE OIL
PRESSURE
SWITCH
Closed with low
oil pressure

PHOTO 7

UNDER-
DASH
FUSE/
RELAY
BOX

PHOTO 75

PASSENGER’S
MULTIPLEX
CONTROL
UNIT

PHOTO 107
VIEW 112

Voltage
Regulator

ALTERNATOR

PHOTO 29

See Gauge
Assembly

LOW
ENGINE OIL
PRESSURE
INDICATOR
LIGHT

GAUGE
ASSEMBLY

PHOTO 71
VIEW 113

L

A

2

C104

PHOTO 48
VIEW 56

C123

PHOTO 7
VIEW 2

A

3

C476

PHOTO 97
VIEW 94

6

See
Charging
System

WHT/BLU

WHT/BLU

WHT/BLU

3

1

20

1

FUSE 13

METER
7.5A

G402

PHOTO 106

BLK

YEL/RED

YEL/RED

YEL/RED

YEL/RED

See Power
Distributon,
page 10-10.

C404

PHOTO 76
VIEW 49

8

YEL

YEL

See Power
Distributon,
page 10-10.

14

3

BLK

A

C102

PHOTO 48
VIEW 54

3

YEL/RED

See Gauge
Assembly,
page 80.

See Power
Distribution,
page 10-10.

UNDER-
HOOD
FUSE/
RELAY
BOX

PHOTO 33

C331

PHOTO 75
VIEW 66

2

C307

PHOTO 37
VIEW 47

1

3

See Ground
Distribution,
page 14-6.

G301

PHOTO 31

5

BLK

1

WHT/RED

A

22

GAUGE
RELAY

PHOTO 27

UNDER-
HOOD
RELAY
BOX C

PHOTO 23

2

RED/YEL

YEL

YEL

WHT/RED

FUSE 55

METER
15A

YEL/RED

C448
(Terminals 14-16)

PHOTO 111
VIEW 80

Ignition
input

Engine
running
input

Engine oil pressure
switch input

Ground

Ground

’96

HOT IN ON OR START

HOT AT ALL TIMES

2004 American Honda Motor Co., Inc.

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How the Circuit Works

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+

72-1

Engine Oil Pressure Indicator Light

18

ENGINE OIL
PRESSURE
SWITCH
Closed with low
oil pressure

PHOTO 7

UNDER-
DASH
FUSE/
RELAY
BOX

PHOTO 75

PASSENGER’S
MULTIPLEX
CONTROL
UNIT

PHOTO 107
VIEW 112

Voltage
Regulator

ALTERNATOR

PHOTO 29

See Gauge
Assembly

LOW
ENGINE OIL
PRESSURE
INDICATOR
LIGHT

GAUGE
ASSEMBLY

PHOTO 71
VIEW 113

L

A

2

C104

PHOTO 48
VIEW 56

C123

PHOTO 7
VIEW 2

A

3

C476

PHOTO 97
VIEW 94

6

See
Charging
System

WHT/BLU

WHT/BLU

WHT/BLU

3

1

20

1

FUSE 13

METER (’97-’98)
METER
SUN ROOF (’99-’03)
7.5A

G402

PHOTO 106

BLK

See Ground
Distribution,
page 14-12.

YEL/RED

YEL/RED

YEL/RED

YEL/RED

See Power
Distributon,
page 10-10.

C404

PHOTO 76
VIEW 49

8

YEL

YEL

See Power
Distributon,
page 10-10.

14

3

BLK

A

C102

PHOTO 48
VIEW 54

3

YEL/RED

C502

PHOTO 77
VIEW 83

1

A

11

BLK/YEL

FUSE 20

ECU
20A

YEL/RED

BLK

C448
(Terminals 14-16)

PHOTO 111
VIEW 80

Ignition
input

Engine
running
input

Engine oil pressure
switch input

Ground

Ground

’97-’03

See Power
Distributon,
page 10-8.

See Power
Distributon,
page 10-9.

BLK/YEL

HOT IN ON OR START

HOT IN ON OR START

2004 American Honda Motor Co., Inc.

Circuit Index

Circuit Index

Menu

Menu

How the Circuit Works

How the Circuit Works

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