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
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