head lamp DAEWOO LACETTI 2004 Service Manual PDF

LIGHTING SYSTEMS 9B – 19
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
121. Reinstall the headlamp relay.
2. Check the voltage at the light switch connector
terminal 2.
Does the voltage equal the specified value?11–14 vGo to Step 14Go to Step 13
13Repair the open circuit between headlamp relay ter-
minal 85 and the light switch connector terminal 2.
Is the repair complete?–System OK–
141. Disconnect the light switch connector.
2. Turn the headlamps to the low–beam position.
3. Use an ohmmeter to check the continuity be-
tween terminals 2 and 3 of light switch.
Does the ohmmeter indicate the specified value?
0 WGo to Step 16Go to Step 15
15Replace the light switch.
Is the repair complete?–System OK–
16Repair the open circuit between terminal 3 of light
switch connector and ground.
Is the repair complete?–System OK–
17Check the voltage at headlamp switch connector
terminal 6.
Does the voltage equal the specified value?11–14 vGo to Step 19Go to Step 18
18Repair the open circuit between headlamp switch
connector and terminal 87 of the headlamp relay.
Is the repair complete?–System OK–
191. Disconnect headlamp switch connector.
2. Turn the headlamps to the low–beam position.
3. Connect an ohmmeter between terminals 5
and 6 of headlamp switch connector. Observe
the reading on the ohmmeter.
4. Turn the headlamps to the high–beam position.
5. Connect an ohmmeter between terminals 4
and 6 of the headlamp switch. Observe the
reading on the ohmmeter.
Does the ohmmeter show the specified value for
both of the tests?
0 WGo to Step 20Go to Step 15
20Repair the open circuit between the headlamp
switch and fuses Ef20, Ef27 and Ef15.
Is the repair complete?–System OK–

9B – 20ILIGHTING SYSTEMS
DAEWOO V–121 BL4
HEADLAMP LEVELING
Headlamps Leveling System Does Not Work
StepActionValue(s)YesNo
1Check the headlamps.
Do the headlamps work?–Go to Step 3Go to Step 2
2Repair the headlamp system before completing this
diagnostic table.
Has the headlamp system been repaired?–Go to Step 3–
3Check fuses Ef20 and Ef27.
Is either of the fuses blown?–Go to Step 5Go to Step 4
41. Check for a short circuit and repair if neces-
sary.
2. Replace the blown fuse.
Is the repair complete?–System OK–
51. Turn the headlamps ON.
2. Check the voltage at fuses Ef20 and Ef27.
Is the specified voltage available at the fuses?11–14 vGo to Step 7Go to Step 6
6Repair the open circuit between the headlamp
switch and fuses Ef20 and Ef27.
Is the repair complete?–System OK–
71. Disconnect the electrical connectors at the
headlamp leveling motors.
2. Turn the headlamps ON.
3. Check the voltage at terminal 5 of the head-
lamps.
Is the specified voltage available at both headlamp
leveling motors?11–14 vGo to Step 9Go to Step 8
8Repair the open circuit between fuses Ef20 and Ef27
and the headlamps.
Is the repair complete?–System OK–
9With the headlamp leveling motors disconnected,
check the resistance between ground and terminal
6 of the headlamps.
Is the resistance equal to the specified value?
0 WGo to Step 11Go to Step 10
10Repair the ground circuit for the headlamps.
Is the repair complete?–System OK–
111. Turn the headlamps ON.
2. With the headlamps, check the voltage at ter-
minal 3 of the headlamp connector.
Is the voltage approximately equal the specified val-
ue?6.2–10.6 vGo to Step 16Go to Step 12
121. Disconnect the headlamp leveling switch.
2. Turn the headlamps ON.
3. Check the voltage at the connector 3 wire at
the headlamp leveling switch connector.
Is the voltage equal to the specified value?11–14 vGo to Step 14Go to Step 13
13Repair the open circuit between the headlamp relay
and the headlamp leveling switch.
Is the repair complete?–System OK–

LIGHTING SYSTEMS 9B – 21
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
141. Turn the low–beam headlamps ON.
2. With the headlamp leveling switch removed for
testing and the electrical connector still con-
nected, check the voltage at the DK GRN wire
at the headlamp leveling switch with the switch
dial set at ”0”.11–14 vGo to Step 16Go to Step 15
15Replace the headlamp leveling switch.
Is the repair complete?–System OK–
161. Turn the low–beam headlamps ON.
2. With the headlamp leveling switch removed for
testing and the electrical connector still con-
nected, check the voltage at the DK GRN wire
at the headlamp leveling switch with the switch
dial set at ”3”.4.5 vGo to Step 17Go to Step 15
17Repair the open DK GRN wire between the head
lamp leveling switch and the headlamp leveling mo-
tors.
Is the repair complete?–System OK–

9B – 22ILIGHTING SYSTEMS
DAEWOO V–121 BL4
DAYTIME RUNNING LAMPS
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 isreleased. 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.
Daytime Running Lamps (DRL) Do Not Turn ON
StepActionValue(s)YesNo
1Turn the headlamps ON with the headlamp switch.
Do the headlamps work?–Go to Step 3Go to Step 2
2Repair the regular headlamp system before com-
pleting this diagnostic table.
Does the DRL system work after the headlamps
have been repaired?–System OKGo to Step 3
3With the DRL module still disconnected, use an
ohmmeter to check the resistance between ground
and terminal 5 of the DRL module connector.
Is the resistance equal to the specified value?
0 WGo to Step 5Go to Step 4
4Repair the circuit between ground and terminal 5 of
the DRL module connector.
Is the repair complete?–System OK–
51. Release the parking brake.
2. Turn the ignition switch ON.
3. Observe the parking brake indicator lamp.
Is the parking brake indicator lamp ON?–Go to Step 6Go to Step 9
6Disconnect the electrical connector to the parking
brake lever switch.
Is the parking brake indicator lamp still ON?–Go to Step 7Go to Step 8
7Repair the short to ground in the parking brake cir-
cuit.
Is the repair complete?–System OK–
8Replace the parking brake lever switch.
Is the repair complete?–System OK–
91. Make sure the headlamps are turned OFF.
2. With the DRL module disconnected, turn the
ignition ON.
3. Check the voltage at terminal 6 of the DRL
module.
Is the voltage equal to the specified value?0 vGo to Step 11Go to Step 10
10Repair the open between fuse F4 and terminal 6 of
the DRL module.
Is the repair complete?–System OK–
11Replace the DRL module.
Is the repair complete?–System OK–

LIGHTING SYSTEMS 9B – 23
DAEWOO V–121 BL4
PARKING LAMPS AND TAILLAMPS
Parking Lamps and Taillamps Do Not Work
StepActionValue(s)YesNo
1Check the headlamps.
Do the headlamps work?–Go to Step 3Go to Step 2
2Repair the headlamps before continuing with this
chart.
After the headlamps have been repaired, are the
parking lamps and taillamps still inoperative?–Go to Step 3System OK
31. Turn the parking lamps on.
2. Use a voltmeter to check voltage at the bulb
socket positive terminal.
Does voltage at the bulb socket equal the specified
value?11–14 vGo to Step 4Go to Step 7
4Connect an ohmmeter between ground and the
lamp socket negative terminal.
Is the resistance equal to the specified value?
0 WGo to Step 6Go to Step 5
5Repair the ground circuit for the lamps.
Is the repair complete?–System OK–
6Replace the faulty bulbs.
Is the repair complete?–System OK–
7Check fuses Ef23 and Ef28.
Are any of the fuses blown?–Go to Step 8Go to Step 9
81. Check for a short circuit and repair it, if neces-
sary.
2. Replace the fuse.
Is the repair complete?–System OK–
91. Turn the headlamps on.
2. Check the voltage at fuses Ef23 (left–side illu-
mination lamp) and Ef28 (right–side illumination
lamp).
Does the voltage at the fuses equal the specified val-
ue?11–14 vGo to Step 10–
10Repair the open circuit between the fuses Ef23 and
Ef28 and the illumination lamps.
Is the repair complete?–System OK–

9B – 34ILIGHTING SYSTEMS
DAEWOO V–121 BL4
FOG LAMPS
Diagnostic Aids
The front fog lamps will not operate unless the illumination lamps or daytime running lamps are on. If the illumination lamps
or daytime running lamps are not operating, repair that problem before attempting to diagnose the fog lamps.
Front Fog Lamps Inoperative
StepActionValue(s)YesNo
1Check fuse Ef24.
Is fuse Ef24 blown?–Go to Step 2Go to Step 3
21. Check for a short circuit and repair it, if neces-
sary.
2. Replace the fuse.
Is the repair complete?–System OK–
3Use a voltmeter to check fuse Ef24.
Does the battery voltage available at fuse Ef24 equal
the specified value?11–14 vGo to Step 5Go to Step 4
4Repair the open circuit from the battery to fuse Ef24.
Is the repair complete?–System OK–
5Remove the fog lamp relay and temporarily substi-
tute a known good relay, such as the headlamp relay.
(Do not substitute the illumination lamp relay.)
Do the fog lamps work with the substituted relay?–Go to Step 6Go to Step 7
61. Return the substituted relay to its original posi-
tion.
2. Replace the inoperative fog lamp relay.
Is the repair complete?–System OK–
71. Return the substituted relay to its original posi-
tion, but do not reinstall the fog lamp relay.
2. Turn on the exterior lamps and the front fog
lamps.
3. Using a voltmeter, check the fog lamp relay
socket at the connector for fog lamp relay ter-
minal 30.
Does the voltage available at the fog lamp relay
socket equal the specified value?11–14 vGo to Step 9Go to Step 8
8Repair the open circuit between fuse Ef24 and the
fog lamp relay.
Is the repair complete?–System OK–
9At the fog lamp relay socket, use an ohmmeter to
verify that the connector for relay terminal 85 is con-
nected to ground.
Does the resistance equal the specified value?0 WGo to Step 11Go to Step 10
10Repair the ground circuit for the fog lamp relay.
Is the repair complete?–System OK–
111. Reinstall the fog lamp relay.
2. Turn ON the exterior lamps and the front fog
lamps.
3. Test for voltage at terminal 2 of the fog lamp
connector.
Does the battery voltage available at terminal 2 of
the fog lamp connector equal the specified value?11–14 vGo to Step 13Go to Step 12

9B – 36ILITHING SYSTEMS
DAEWOO V–121 BL4
MAINTENANCE AND REPAIR
ON–VEHICLE SERVICE
HEADLAMPS/FRONT TURN SIGNAL
LAMPS
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the headlamp mounting bolts and nut.
3. Disconnect the electrical connectors.
4. Remove the turn signal bulb.
5. Remove the headlamp assembly.
6. Remove the cap concealing the headlamp bulb.
7. Disconnect the headlamp bulb electrical connector.
8. Remove the headlamp bulb.
Installation Procedure
1. Install the headlamp bulb.
2. Connect the headlamp bulb electrical connector.
3. Install the cap concealing the headlamp bulb.
4. Install the turn signal bulb.
5. Connect the electrical connectors.
Notice : Dissimilar metals in direct contact with each other
may corrode rapidly. Make sure to use the correct fasten-
ers to prevent premature corrosion.
6. Install the headlamp assembly with the bolts and
nut.
7. Connect the negative battery cable.

LITHING SYSTEMS 9B – 37
DAEWOO V–121 BL4
Tighten
Tighten the headlamp assembly bolts and nut to 4
NSm (35 lb–in).
DAYTIME RUNNING LAMP MODULE
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the instrument panel under cover and the
knee bolster.
3. Remove the bolts and the daytime running lamp
module.
4. Disconnect the electrical connector.
Installation Procedure
1. Connect the electrical connector.
2. Install the daytime running lamp module with the
bolts.
Tighten
Tighten the daytime running lamp module bolts to 2
NSm (18 lb–in).
3. Install the instrument panel under cover and the
knee bolster.
4. Connect the negative battery cable.
PARKING LAMPS
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the headlamp. Refer to ”Headlamps” in
this section.
3. Remove the parking lamp.

9B – 38ILITHING SYSTEMS
DAEWOO V–121 BL4
Installation Procedure
1. Install the parking lamp.
2. Install the headlamp. Refer to ”Headlamps” in this
section.
3. Connect the negative battery cable.
SIDE TURN SIGNAL LAMPS
Removal Procedure
1. Disconnect the negative battery cable.
2. Slide the side turn signal lamp rearward.
3. Remove the lamp.
4. Disconnect the electrical connector.
Installation Procedure
1. Connect the electrical connector.
2. Install the side turn signal lamp.
3. Connect the negative battery cable.
FRONT FOG LAMPS
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the bolts and the front fog lamp.
3. Disconnect the electrical connector.

LITHING SYSTEMS 9B – 43
DAEWOO V–121 BL4
Installation Procedure
1. Connect the electrical connector.
Notice : Dissimilar metals in direct contact with each other
may corrode rapidly. Make sure to use the correct fasten-
ers to prevent premature corrosion.
2. Install the door jamb switch with the screw.
Tighten
Tighten the door jamb switch screw to 4 NSm (35 lb–
in).
3. Connect the negative battery cable.
CENTER ROOM LAMP
Removal Procedure
1. Disconnect the negative battery cable.
2. Pry off the center room lamp lens by inserting a
screwdriver into the recess along the edge of the
lens.
3. Remove the screws and the center room lamp
housing from the headliner.
4. Disconnect the electrical connector.
5. Remove the bulb.
Installation Procedure
1. Install a new bulb.
2. Connect the electrical connector.
Notice : Dissimilar metals in direct contact with each other
may corrode rapidly. Make sure to use the correct fasten-
ers to prevent premature corrosion.
3. Install the center room lamp housing to the headlin-
er with the screws.
4. Press the center room lamp lens onto the housing.
5. Connect the negative battery cable.
MAP LAMP
Removal Procedure
1. Disconnect the negative battery cable.
2. Pry off the map lamp lens.
3. Remove the screws and the map lamp.
4. Disconnect the electrical connector.