Get Body Electrical System Guide for Suzuki Alto 4 Door Fifth Generation (1998-2003)

BODY ELECTRICAL SYSTEM 8-1

SECTION 8

BODY ELECTRICAL SYSTEM

CONTENTS

GENERAL DESCRIPTION 8- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cautions in Servicing 8- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wire Color Symbols 8- 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Combination Meter 8- 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DIAGNOSIS 8- 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Headlight 8- 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Turn Signal and Hazard Warning Lights 8- 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Clearance, Tail and License Plate Lights 8- 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Back-up Light 8- 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Brake Lights 8- 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fuel Meter and Fuel Gauge Unit 8- 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Engine Coolant Temp. (ECT) Meter and ECT Sensor 8- 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Oil Pressure Light 8- 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Brake and Parking Brake Warning Light 8- 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Windshield Wiper and Washer 8- 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Front Wiper and Washer 8- 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Interior Light 8- 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Horn 8- 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ON-VEHICLE SERVICE 8- 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Headlight 8- 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Turn Signal and Hazard Warning Light 8-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ignition Switch 8-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Combination Meter 8-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fuel Meter/Fuel Gauge Unit 8-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Engine Coolant Temperature (ECT) Meter and Sensor Unit 8-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Oil Pressure Warning Light 8-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Brake and Parking Brake Warning Light 8-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wipers and Washers 8-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Door Switch 8-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CAUTIONS IN SERVICING

When performing works related to electric systems, observe fol-

lowing cautions for the purpose of protection of electrical parts and

prevention of a fire from occurrence.

D When removing the battery from the vehicle or disconnecting the

cable from the battery terminals for inspection or service works

on the electric systems, always confirm first that the ignition

switch and all the other switches have been turned OFF. Other-

wise, the semi-conductor part may be damaged.

D When disconnecting cables from the battery, be sure to discon-

nect the one from the negative (–) terminal first and then the oth-

er from the positive (+) terminal.

D Reverse the above order when connecting the cables to the bat-

tery terminals.

D When disconnecting connectors, never pull the wiring har-

nesses. Unlock the connector lock first and then pull them apart

by holding connectors themselves.

D When connecting connectors, also hold connectors and push

them together until they lock securely (a click is heard).

8-2 BODY ELECTRICAL SYSTEM

GENERAL DESCRIPTION

The body electrical components of this vehicle are designed to operate on 12 Volts power supplied by the battery.

The electrical system utilizes negative ground polarity.

D When installing the wiring harness, fix it with clamps so that no

slack is left.

D When installing vehicle parts, be careful so that the wiring har-

ness is not interfered with or caught by any other part.

D To avoid damage to the harness, protect its part which may con-

tact against a part forming a sharp angle by winding tape or the

like around it.

D When replacing a fuse, make sure to use a fuse of the specified

capacity. Use of a fuse with a larger capacity will cause a dam-

age to the electrical parts and a fire.

D Always be careful not to handle electrical parts (computer, relay,

etc.) in a rough manner or drop them.

BODY ELECTRICAL SYSTEM 8-3

D When performing a work that produces a heat exceeding 805C

in the vicinity of the electrical parts, remove the heat sensitive

electrical part(s) beforehand.

D Use care not to expose connectors and electrical parts to water

which will be a cause of a trouble.

D When using a tester for checking continuity or measuring volt-

age, be sure to insert the tester probe from the wire harness

side.

WIRE COLOR SYMBOLS

The wire color is abbreviated to the first (or first two) alphabet(s) of

each color.

There are two kinds of colored wire used in this vehicle. One is

single-colored wire and the other is dual-colored (striped) wire.

The single-colored wire uses only one color symbol (i.e. “G”).

The dual-colored wire uses two color symbols (i.e. “G/Y”). The first

symbol represents the base color of the wire (“G” in the figure) and

the second symbol represents the color of the stripe (“Y” in the fig-

ure).

Symbol

G : Green

G/Y : Green/Yellow

8-4 BODY ELECTRICAL SYSTEM

Symbol Wire Color Symbol Wire Color

B Black O Orange

BI Blue R Red

Br Brown W White

G Green Y Yellow

Gr Gray P Pink

Lbl Light blue V Violet

Lg Light green

COMBINATION METER

1. To lighting switch

2. Blank

3. To ground

4. To fuel level gauge

5. To combination switch (turn L)

6. To ignition switch

7. To ECT sensor

8. To brake fluid level switch

9. To combination switch (turn R)

10. To ground

11. To ECM

12. Blank

R/Y

Y/R

G/R

B/W

Y/W

R/B

G/Y

B/BI

1. To alternator

2. To parking brake switch

3. To ECM

4. Blank

5. Blank

6. Blank

7. To main fuse

8. To combination switch

(dimmer & passing switch)

9. To oil pressure switch

10. Blank

W/R

R/B

V/Y

Y/B

COUPLER K

NOTE:

Terminal arrangement of coupler viewed from harness side.

Coupler K Coupler L

COUPLER L

BODY ELECTRICAL SYSTEM 8-5

8-6 BODY ELECTRICAL SYSTEM

DIAGNOSIS

HEADLIGHT

Trouble

Possible Cause Correction

Headlights do not light up Bulb blown

Headlight switch faulty

HEAD R and L fuses blown

Wiring or grounding faulty

Replace bulb

Replace headlight switch

Replace fuses to check for short

Repair circuit

Only one headlight does

not light up

Bulb blown

HEAD R or L fuse blown

Wiring or grounding faulty

Replace bulb

Replace fuse to check for short

Repair circuit

Only one beam (“Hi” or

“Lo”) does not light

Bulb blown

Lighting or dimmer switch faulty

Wiring harness faulty

Replace bulb

Replace switch

Repair circuit

TURN SIGNAL AND HAZARD WARNING LIGHTS

Trouble

Possible Cause Correction

Flash rate high or one side

only flashes

Bulb blown on “flash rate high”-side

Incorrect bulb

Turn signal/hazard warning relay faulty

Open circuit or high resistance

existing between combination switch

(turn signal/hazard warning switch) and

light on one side

Wiring or grounding faulty

Replace bulb

Replace relay

Repair circuit

No flashing HAZARD HORN and/or TURN BACK

fuse blown

Open circuit or high resistance existing

between battery and switch

Turn signal/hazard relay faulty

Combination switch (turn signal/hazard

switch) faulty

Wiring or grounding faulty

Replace fuses to check for short

Check bulb and check circuit

Replace relay

Replace switch

Repair circuit

Flash rate low Supply voltage low

Turn signal/hazard relay faulty

Check charging system

Replace relay

CLEARANCE, TAIL AND LICENSE PLATE LIGHTS

Trouble

Possible Cause Correction

All lights do not light up Bulb(s) blown

TAlL STOP fuse blown

Combination switch (lighting and dim-

mer switch) faulty

Wiring or grounding faulty

Replace bulb (s)

Replace fuse to check for short

Replace switch

Repair circuit

Some lights do not light up Bulb(s) blown

Wiring or grounding faulty

Replace bulb (s)

Repair circuit

BODY ELECTRICAL SYSTEM 8-7

BACK-UP LIGHT

Trouble

Possible Cause Correction

Back-up lights do not light

Bulb(s) blown

TURN BACK fuse blown

Back-up light switch faulty

Wiring or grounding faulty

Replace bulb (s)

Replace fuse to check for short

Replace switch

Repair circuit

Back-up lights stay on Back-up light switch faulty Check or replace switch

BRAKE LIGHTS

Trouble Possible Cause Correction

Brake lights do not light up Bulb(s) blown

TAlL STOP fuse blown

Brake light switch faulty

Wiring or grounding faulty

Replace bulb (s)

Replace fuse to check for short

Replace switch

Repair circuit

Brake lights stay on Brake light switch faulty Check, adjust or replace switch

FUEL METER AND FUEL GAUGE UNIT

Trouble

Possible Cause Correction

Fuel meter shows no op-

eration or incorrect opera-

tion

IG-COIL fuse blown

Fuel gauge unit faulty

Printed plate in combination meter

faulty

Fuel meter faulty

Wiring or grounding faulty

Replace fuse to check for short

Replace fuel gauge unit

Replace printed plate

Replace fuel meter

Repair circuit

ENGINE COOLANT TEMP. (ECT) METER AND ECT SENSOR

Trouble

Possible Cause Correction

Engine coolant temp. me-

ter shows no operation or

incorrect operation

IG-COIL fuse blown

ECT meter faulty

Printed plate in combination meter

faulty

ECT sensor faulty

Wiring or grounding faulty

Replace fuse to check for short

Replace ECT meter

Replace printed plate

Replace ECT sensor

Repair circuit

OIL PRESSURE LIGHT

Trouble

Possible Cause Correction

Oil pressure warning light

does not light up when

ignition switch is on at en-

gine off

Bulb in combination meter blown

IG-COIL fuse blown

Printed plate in combination meter

faulty

Oil pressure switch faulty

Wiring or grounding faulty

Replace bulb

Replace fuse to check for short

Replace printed plate

Replace oil pressure switch

Repair circuit

8-8 BODY ELECTRICAL SYSTEM

BRAKE AND PARKING BRAKE WARNING LIGHT

Trouble

Possible Cause Correction

Brake warning light does

not light up when fluid low

level

Bulb in combination meter blown

IG-COIL fuse blown

Printed plate in combination meter

faulty

Brake fluid level switch faulty

Wiring or grounding faulty

Replace bulb

Replace fuse to check for short

Replace printed plate

Replace brake fluid level switch

Repair circuit

Brake warning light does

not light up when parking

brake pull up

Bulb in combination meter blown

IG-COIL fuse blown

Printed plate in combination meter

faulty

Parking brake switch faulty

Wiring or grounding faulty

Replace bulb

Replace fuse to check for short

Replace printed plate

Replace parking brake switch

Repair circuit

Brake warning light stay on Brake fluid level switch and/or parking

brake switch faulty

Replace switch

WINDSHIELD WIPER AND WASHER

FRONT WIPER AND WASHER

Trouble

Possible Cause Correction

Wiper malfunctions or

does not return to its origi-

nal position

WIPER WASHER fuse blown

Wiper motor faulty

Combination switch (wiper switch)

faulty

Wiring or grounding faulty

Replace fuse to check for short

Replace wiper motor

Replace switch

Replace circuit

Washer malfunctions Washer hose or nozzle clogged

WIPER WASHER fuse blown

Washer motor faulty

Combination switch (wiper switch)

faulty

Wiring or grounding faulty

Clean or repair clogged hose or nozzle

Replace fuse to check for short

Replace washer motor

Replace switch

Repair circuit

INTERIOR LIGHT

Trouble

Possible Cause Correction

Interior light does not light

Bulb blown

TAIL STOP fuse blown

Interior light switch faulty

Door switch faulty

Wiring or grounding faulty

Replace bulb

Replace fuse to check for short

Replace switch

Repair circuit

HORN

Trouble

Possible Cause Correction

Horn does not operate HAZARD HORN fuse blown

Horn switch faulty

Horn faulty

Replace fuse to check for short

Replace horn switch

Replace horn

ON-VEHICLE SERVICE

HEADLIGHT

HEADLIGHT SWITCH

INSPECTION

1) Disconnect negative cable at battery.

2) Disconnect combination switch lead wire coupler.

3) Check for continuity between terminals at each switch position

shown below. If check result is not as specified, replace.

REMOVAL AND INSTALLATION

Refer to COMBINATION SWITCH ASSEMBLY in section 3C.

Terminal

Switch Position

Mating side (front) view of combination

switch coupler

Terminal

Switch Position

HEADLIGHT

REMOVAL

1) Disconnect negative cable at battery.

2) Remove front grille.

3) Remove garnish (1) installed under the headlight.

4) Remove headlight mounting bolts.

5) Detach headlight assembly (2) from vehicle.

6) Disconnect couplers from headlight assembly.

7) Remove headlight assembly.

INSTALLATION

Reverse removal procedure for installation.

BODY ELECTRICAL SYSTEM 8-9

Lighting switch

K L M R J

OFF

SMALL

HEAD

Dimmer and passing switch

R H J G

PASS

BULB REPLACEMENT

WARNING:

To avoid danger of being burned, don’t touch when the

bulb is hot.

1) Disconnect negative cable at battery.

2) Disconnect harness from bulb.

3) Remove socket cover (1) and bulb (2).

4) Replace bulb and assemble all removed parts.

HEADLIGHT AIMING WITH SCREEN

NOTE:

D Unless otherwise obligated by local regulations, adjust

headlight aiming according to following procedure.

D After replacing headlight, be sure to adjust aiming.

Before adjustment, make sure the following.

a) Place vehicle on a flat surface in front of blank wall (screen)

ahead of headlight surface.

Clearance “a”: 10 m (32.8 ft.)

b) Adjust air pressure of all tires to a specified value respectively.

c) Bounce vehicle body up and down by hand to stabilize suspen-

sion.

d) Carry out with one driver aboard.

Driver’s weight: 75 kg (165 Ib)

Adjustment

1) Check to see if hot spot (high intensity zone) of each main (low)

beam axis falls as illustrated.

Clearance “H”: Approx. 130 mm (5.15 in.)

2) If headlight aiming is not set properly, align it to specification by

adjusting aiming screw and aiming gear.

X - X: Horizontal center line of headlights bulb

A - A: Vertical center line of left headlight bulb

B - B: Vertical center line of right headlight bulb

1. Headlight assembly

2. Aiming (for up/down adjustment)

3. Aiming (for right/left adjustment)

1. Screen

8-10 BODY ELECTRICAL SYSTEM

TURN SIGNAL AND HAZARD WARNING

LIGHT

TURN SIGNAL LIGHT SWITCH

INSPECTION

1) Disconnect negative cable at battery.

2) Disconnect combination switch lead wire coupler.

3) Check for continuity between terminals at each switch position

shown below. If check result is not as specified, replace.

Terminal

Turn

Signal

Hazard

REMOVAL AND INSTALLATION

Refer to COMBINATION SWITCH ASSEMBLY in Section 3C.

Mating side (front) view of combination

switch coupler

TURN SIGNAL/HAZARD RELAY

The turn signal/hazard relay (1) is located on the fuse box (2).

INSPECTION

Connect battery and tester as shown left.

Unless a continued click sound is heard, replace relay (1).

Reference flashing cycle : 60 – 120 cycle/minute

BODY ELECTRICAL SYSTEM 8-11

A B C D E F

OFF

IGNITION SWITCH

INSPECTION

1) Disconnect negative cable at battery.

2) Disconnect ignition main switch lead wire coupler.

3) Check for continuity between terminals at each switch position

shown below. If check result is not as specified, replace.

Terminal

Position

key

Mating side (front) view of ignition main

switch coupler

REMOVAL AND INSTALLATION

Refer to STEERING LOCK ASSEMBLY (IGNITION SWITCH) in

section 3C.

COMBINATION METER

REMOVAL

1) Disconnect negative cable at battery.

2) Remove heater control knobs (1) and mounting bolts.

3) Disconnect heater control lead wire couplers (2).

4) Loosen steering column mounting nuts of upper side, and lower

steering column.

5) Remove meter cluster (3).

6) Pull out combination meter (4), and disconnect speedometer

cable and combination meter lead wire couplers.

INSTALLATION

Reverse removal procedure for installation.

8-12 BODY ELECTRICAL SYSTEM

+B ACC IG ST

OUT

LOCK

ACC

START

FUEL METER/FUEL GAUGE UNIT

FUEL METER

INSPECTION

1) Remove rear seat cushion. Refer to REAR SEAT in Section 9.

2) Disconnect Y/R lead wire coupler under the rear seat cushion.

3) Turning switch ON, and check that fuel meter indicates E.

4) Turn ignition switch OFF.

5) Ground Y/R lead through a 3.4 W test bulb (1) as illustrated.

6) Turn ignition switch ON and check that bulb light up and pointer

(2) moves to F side.

7) If fuel meter shows no operation, repair or replace defective

parts.

FUEL SENDER GAUGE

INSPECTION

1) Remove fuel tank referring to FUEL TANK REMOVAL in Sec-

tion 6C.

2) Remove fuel gauge unit (1) from tank.

3) Check resistance between terminal (a) and gauge unit (ground)

in individual each float position below.

If the measured value is out of specification, replace.

BODY ELECTRICAL SYSTEM 8-13

Float Position Resistance (W)

Full Upper “a” 40.9 mm (1.61 in.) 1 - 5

Middle (1/2) “b” 106.2 mm (4.18 in.) 28.5 - 36.5

Full Lower “c” 169.5 mm (6.67 in.) 103 - 117

ENGINE COOLANT TEMPERATURE (ECT)

METER AND SENSOR UNIT

ENGINE COOLANT TEMPERATURE (ECT) METER

INSPECTION

1) Disconnect Y/W lead wire going to ECT sensor.

2) Turn ignition switch ON, and check that ECT meter indicates

COOL.

3) Turn ignition switch OFF.

4) Ground Y/W lead wire through a 3.4 W test bulb (1) as illus-

trated.

5) Turn ignition switch ON, and check that bulb light up and pointer

(2) moves to hot side.

6) If ECT meter shows no operation, repair or replace defective

parts.

ENGINE COOLANT TEMPERATURE (ECT) SENSOR

FOR METER

REMOVAL AND INSTALLATION

Refer to ENGINE COOLANT TEMPERATURE SENSOR in sec-

tion 6E1.

WARNING:

D Make sure that engine coolant temperature is cold be-

fore removing any part of cooling system.

D Also be sure to disconnect negative cable from battery

terminal before removing any part.

1. ECT sensor

INSPECTION

Warm up ECT sensor (1) observing resistance between sensor ter-

minal (2) and sensor unit (1). Resistance should be decreased with

increase of its temperature.

8-14 BODY ELECTRICAL SYSTEM

Temperature Resistance

505C (1225F) 136 - 216 W

1205C (2485F) 16.4 - 19.4 W

OIL PRESSURE WARNING LIGHT

OIL PRESSURE SWITCH

INSPECTION

1) Disconnect oil pressure switch (1) lead wire.

2) Check for continuity between oil pressure switch terminal (2)

and cylinder block (3) as shown.

If check result is not as specified, replace oil pressure switch (1).

REMOVAL AND INSTALLATION

Refer to OIL PRESSURE CHECK in Section 6A1.

BRAKE AND PARKING BRAKE WARNING

LIGHT

INSPECTION

D BRAKE FLUID LEVEL SWITCH

Check switch (1) for continuity.

If check result is not as specified, replace switch.

D PARKING BRAKE SWITCH

Check switch (1) for continuity.

If check result is not as specified, replace switch.

BODY ELECTRICAL SYSTEM 8-15

During Engine Running No continuity

At Engine Stop Continuity

OFF position (float up) No continuity

ON position (float down) Continuity

OFF position

(parking brake released)

No continuity

ON position

(parking brake lever pulled up)

Continuity

COMPONENTS

FRONT WIPER

FRONT WASHER

WIPERS AND WASHERS

FRONT WIPER/WASHER SWITCH

INSPECTION

1) Disconnect negative cable at battery.

2) Disconnect combination switch lead wire coupler.

3) Check for continuity between terminals at each switch position

as shown below. If check result is not as specified, replace

switch.

REMOVAL AND INSTALLATION

Refer to COMBINATION SWITCH ASSEMBLY in Section 3C.

Wiper SW

Terminal

Washer

OFF

Mating side (front) view of combination

switch coupler

8-16 BODY ELECTRICAL SYSTEM

N P O S

OFF

INT

INTERMITTENT WIPER RELAY CIRCUIT

INSPECTION

1) Disconnect negative cable at battery.

2) Disconnect combination switch lead wire coupler.

3) Turn the front wiper switch to INT position.

4) Connect battery positive terminal to terminal “N” and battery

negative terminal to terminal “R”.

5) Connect voltmeter positive lead to terminal “O” and negative

lead to terminal “R”

Check that the voltmeter indicates the battery voltage (10 –

14V).

6) Connect terminal “S” and terminal “N” by a jumper wire. Then

move jumper wire end connected to terminal “N” to terminal “R”.

Observe the voltmeter voltage drops to 0V right after connect-

ing the jumper wire from terminal “N” to “R”. Then the voltage

rises to battery voltage (10 – 14 V) within the time shown below.

Mating side (front) view of combination

switch coupler

BODY ELECTRICAL SYSTEM 8-17

WASHER LINKED OPERATION

INSPECTION

1) Disconnect negative cable at battery.

2) Disconnect combination switch lead wire coupler.

3) Make sure that front wiper switch is at OFF position.

4) Connect battery positive terminal to terminal “N” and battery

negative terminal to terminal “R”.

5) Connect voltmeter positive lead to terminal “O” and negative

lead to terminal “R”.

6) Push washer switch and check that voltage changes as shown

in the diagram.

Mating side (front) view of combination

switch coupler

FRONT WIPER MOTOR

INSPECTION

1) As illustrated left, have a 12V battery and connect its (+) termi-

nal to terminal “A”, and its (–) terminal to bracket (1) (wiper

ground). If motor (2) rotates at a low revolution speed of 45 to

55 rpm, it is proper. As for high speed check, connect battery (+)

terminal to terminal “B”, and its (–) terminal to bracket (1) (wiper

ground). If motor (2) rotates at a high revolution speed of 67 to

83 rpm, it is proper.

2) Testing automatic stop action

a) Connect 12V battery (+) terminal to terminal “A” of wiper mo-

tor (2) and (–) terminal to bracket (1) (wiper ground) and let

the motor turn.

b) Disconnect terminal “A” from battery, and let the motor stop.

c) Connect terminal “A” and “D” with a jumper wire (3), and con-

nect terminal “C” to battery (+) terminal. Observe the motor

turns once again then stops at a given position.

d) Repeat a) thru c) several times and inspect if the motor stops

at the given position every time.

8-18 BODY ELECTRICAL SYSTEM

FRONT WASHER PUMP

REMOVAL

1) Disconnect negative cable at battery.

2) Remove washer tank fitting screws.

3) Disconnect pump lead wire and hoses.

4) Remove washer tank (1).

5) Remove pump (2) from tank.

INSPECTION

Connect battery (+) and (–) terminals to pump (+) and (–) terminals

respectively to check pumping rate.

Check for front washer pump.

Pumping Rate:

More than 1.0 l/min (2.1 US pt./min, 1.76 Imp pt./min)

Installation

Reverse removal procedure for installation.

DOOR SWITCH

INSPECTION

Pull out door switch from body and check switch for continuity.

If found defective, replace switch.

BODY ELECTRICAL SYSTEM 8-19

Body Electrical System for Your Suzuki Alto 4 Door Fifth Generation (1998-2003)

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