Daewoo Nubira. Manual - part 85

9B – 14

I

LIGHTING SYSTEMS

DAEWOO V–121 BL4

Step

Action

Value(s)

Yes

No

1

Check fuses EF34, EF30, EF25, EF31, EF26, and
EF24.
Is any fuse blown?

Go to Step 2

Go to Step 3

2

1.  Check for a short circuit and repair if neces-

sary.

2.  Replace the fuse.

Is the repair complete?

System OK

3

1.   Turn the low–beam headlamps ON.
2.  Check the voltage at fuses EF24 and EF25.
3.  Check the voltage at fuses EF21 and EF22

with high beams selected.

Is the voltage equal to the specified value?

11–14 v

Go to Step 4

Go to Step 9

4

1.  Turn the low–beam headlamps ON.
2.  Check the voltage at the headlamp connector

terminal 5.

3.  Turn the high–beam headlamps ON.
4.  Check the voltage at headlamp connector ter-

minal 4.

Does the battery voltage available at the headlamps
equal the value specified?

11–14 v

Go to Step 6

Go to Step 5

5

Repair the open circuit between fuses EF30, EF25,
EF31, and EF26 and the headlamps.
Is the repair complete?

System OK

6

Use an ohmmeter to check between ground and the
headlamp connector terminal 6.
Is the resistance equal to the specified value?

0 

W

Go to Step 8

Go to Step 7

7

Repair the ground circuit.
Is the repair complete?

System OK

8

1.  Replace the faulty headlamps.
2.  Check the charging system to make sure that

charging voltage is not excessively high. Re-
pair if necessary.

Is the repair complete?

System OK

9

Use a voltmeter to check for power to fuses EF34
and EF29.
Is the voltage equal to the specified value?

11–14 v

Go to Step 11

Go to Step 10

10

Repair the power supply circuit to fuses EF34 and
EF29.
Is the repair complete?

System OK

11

Temporarily substitute the illumination relay in place
of the headlamp relay.
Do the headlamps operate with the substituted
relay?

Go to Step 12

Go to Step 13 

12

Install the illumination relay in its original position,
and install a new headlamp relay.
Is the repair complete?

System OK

13

1.  Return the illumination relay to its original posi-

tion, but do not install the headlamp relay.

2.  Use a voltmeter to check the headlamp relay

connector for terminal 30.

Does the voltmeter indicate the value specified?

11–14 v

Go to Step 15

Go to Step 14 

LIGHTING SYSTEMS  9B – 15

DAEWOO V–121 BL4

Step

No

Yes

Value(s)

Action

14

Replace the engine fuse block.
Is the repair complete?

System OK

15

With the headlamp relay removed, use a voltmeter
to check the headlamp relay connector terminal 85.
Does the voltmeter indicate the value specified?

11–14 v

Go to Step 16

Go to Step 14 

16

1.  With the headlamp relay removed, turn the

headlamps to low–beam.

2.  Use an ohmmeter to check the continuity be-

tween connector relay terminal 86 and ground.

Does the ohmmeter indicate the specified value?

[

 0 

W

Go to Step 22

Go to Step 17 

17

1.  Reinstall the headlamp relay.
2.  Check the voltage at the headlamp switch con-

nector C2 (terminal 2).

Does the voltage equal the specified value?

11–14 v

Go to Step 19

Go to Step 18 

18

Repair the open circuit between headlamp relay ter-
minal 85 and the headlamp switch connector C2 ter-
minal 2.
Is the repair complete?

System OK

19

1.  Disconnect the headlamp switch connector C2.
2.  Turn the low–beam headlamps ON.
3.  Use an ohmmeter to check the continuity be-

tween terminals 2 and 3 of headlamp combina-
tion switch C2.

Does the ohmmeter indicate the specified value?

[

 0 

W

Go to Step 21

Go to Step 20 

20

Replace the headlamp switch.
Is the repair complete?

System OK

21

Repair the open circuit between terminal 3 of head-
lamp switch connector C2 and ground.
Is the repair complete?

System OK

22

Check the voltage at headlamp switch connector
C1, (terminal 6).
Does the voltage equal the specified value?

11–14 v

Go to Step 24

Go to Step 23 

23

Repair the open circuit between headlamp switch
connector C1 and terminal 87 of the headlamp relay.
Is the repair complete?

System OK

24

1.  Disconnect headlamp switch connector C1.
2.  Turn the headlamps to the low–beam position.
3.  Connect an ohmmeter between terminals 5

and 6 of headlamp switch connector C1.

4.  Turn the high–beam headlamps ON.
5.  Connect an ohmmeter between terminals 4

and 6 of the headlamp switch.

Does the ohmmeter show the specified value for
both of the tests?

[

 0 

W

Go to Step 25

Go to Step 20 

25

Repair the open circuit between the headlamp
switch and fuses EF30, EF25, EF31, and EF26.
Is the repair complete?

System OK

 

Diagnostic Aids
The daytime running lamp (DRL) system will not work if the parking brake is applied. The system is designed to work only
when the engine is running and the parking brake is released. If the parking brake circuit is shorted to ground or the switch
stays closed when the engine is running, the DRL system will not work.

9B – 16

I

LIGHTING SYSTEMS

DAEWOO V–121 BL4

Daytime Running Lamps Do Not Turn ON

Step

Action

Value(s)

Yes

No

1

Turn the headlamps ON.
Do the headlamps work?

Go to Step 3

Go to Step 2

2

Repair the headlamp system.
Is the repair complete?

System OK

Go to Step 3

3

Check fuse EF34.
Is fuse EF34 blown?

Go to Step 4

Go to Step 5

4

1.  Check for a short circuit and repair it, if neces-

sary.

2.  Replace fuse EF34.

Is the repair complete?

System OK

5

1.  Turn the ignition ON.
2.  Check the voltage at fuse EF34.

Is the voltage equal to the specified value?

11–14 v

Go to Step 7

Go to Step 6

6

Repair the power supply circuit to fuse EF34.
Is the repair complete?

System OK

7

S

  Disconnect the electrical connector from the

daytime running lamp (DRL) module.

S

  Turn the ignition ON.

S

  Check the voltage at terminal A of the DRL

module.

Is the voltage equal to the specified value?

11–14 v

Go to Step 9

Go to Step 8

8

Repair the open circuit between fuse EF34 and ter-
minal A of the DRL module connector.
Is the repair complete?

System OK

9

With the DRL module still disconnected, use an
ohmmeter to check the resistance between ground
and terminal E of the DRL module connector.
Is the resistance equal to the specified value?

[

 0 

W

Go to Step 11

Go to Step 10

10

Repair the circuit between ground and terminal E of
the DRL module connector.
Is the repair complete?

System OK

11

S

  Release the parking brake.

S

  Turn the ignition ON.

S

  Observe the parking brake indicator lamp.

Is the parking brake indicator lamp ON?

Go to Step 12

Go to Step 15

12

Disconnect the electrical connector to the parking
brake switch.
Is the parking brake indicator lamp still ON?

Go to Step 13

Go to Step 14

13

Repair the short to ground in the parking brake cir-
cuit.
Is the repair complete?

System OK

14

Replace the parking brake switch.
Is the repair complete?

System OK

15

S

  Turn the headlamps OFF.

S

  With the DRL module disconnected, turn the

ignition ON.

S

  Check the voltage at terminal F of the DRL

module.

Is the voltage equal to the specified value?

0 v

Go to Step 17

Go to Step 16

LIGHTING SYSTEMS  9B – 17

DAEWOO V–121 BL4

Step

No

Yes

Value(s)

Action

16

Repair the open circuit between fuse F3 and termi-
nal F of the DRL module.
Is the repair complete?

System OK

17

Replace the DRL module.
Is the repair complete?

System OK