ground DAEWOO LACETTI 2004 Service Repair Manual

LIGHTING SYSTEMS 9B – 33
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
11Use an ohmmeter to check the resistance between
ground and the BLK wire at the luggage compart-
ment lamp switch connector (harness side).
Is the resistance equal to the specified value?0WGo to Step 12Go to Step 13
12Replace the luggage compartment lamp switch.
Is the repair complete?–System OK–
13Repair the ground circuit for the interior courtesy
lamp.
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

LIGHTING SYSTEMS 9B – 35
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
12Repair the open circuit between the fog lamp relay
terminal 87 and the fog lamps.
Is the repair complete?–System OK–
13Use an ohmmeter (or test lamp) to check the ground
at terminal 1 of the fog lamp connector.
Does the resistance equal the specified value?0 WGo to Step 15Go to Step 14
14Repair the fog lamp ground circuit.
Is the repair complete?–System OK–
15Replace the faulty fog lamp bulbs.
Is the repair complete?–System OK–

9C – 4IHORN(S)
DAEWOO V–121 BL4
GENERAL DESCRIPTION
AND SYSTEM OPERATION
HORN(S)
The horns are located under the hood. They are attached
near the radiator at the front of the vehicle. The horns are
actuated by pressing the steering wheel pad, which
grounds the horns’ electrical circuit.

9D – 10IWIPERS/WASHER SYSTEMS
DAEWOO V–121 BL4
WINDSHIELD WASHER SYSTEM
Windshield Washer Inoperative, Wipers Work OK
StepActionValue(s)YesNo
1Activate the windshield washer switch.
Do the windshield wipers operate when the washer
switch is activated?–Go to Step 4Go to Step 2
21. Turn the ignition ON.
2. While activating the washer switch, test the
voltage at windshield wiper switch connector
terminal A4.
Is voltage equal to the specified value?11–14 vGo to Step 8Go to Step 3
3Replace windshield wiper switch.
Is the repair complete?–System OK–
4Check the windshield washer fluid reservoir.
Is there washer fluid in the fluid reservoir?–Go to Step 6Go to Step 5
5Fill the windshield washer fluid reservoir.
Is the repair complete?–System OK–
6Check the windshield washer hoses and nozzles.
Are the windshield washer hoses and nozzles
clogged or damaged?–Go to Step 7Go to Step 8
7Repair the washer hoses and the nozzles.
Is the repair complete?–System OK–
81. Turn the ignition ON.
2. With the windshield washer activated, test volt-
age at the windshield washer pump.
Is the voltage equal to the specified value?11–14 vGo to Step 10Go to Step 9
9Repair open circuit between the windshield washer
pump and the windshield wiper switch.
Is the repair complete?–System OK–
10Use an ohmmeter to measure resistance between
ground and the windshield washer pump connector
terminal 1.
Is the resistance equal to the specified value?
0 WGo to Step 12Go to Step 11
11Repair the windshield washer pump ground circuit.
Is the repair complete?–System OK–
12Replace the windshield washer pump.
Is the repair complete?–System OK–

WIPERS/WASHER SYSTEMS 9D – 11
DAEWOO V–121 BL4
REAR WINDOW WIPER (HATCHBACK)
Diagnostic Aids
If the front wiper is operating correctly, begin the diagnostic table at Step 5. It would not be necessary to check the fuse
or power supply circuit.
Rear Window Wiper (Hatchback)
StepActionValue(s)YesNo
1Check fuse F9.
Is fuse F9 blown?–Go to Step 2Go to Step 3
21. Check for a short circuit and repair, if neces-
sary.
2. Replace fuse F9.
Is the repair complete?–System OK–
31. Turn the ignition ON.
2. Check the voltage at fuse F9.
Does the voltage equal the specified value?11–14 vGo to Step 5Go to Step 4
4Repair the open power supply circuit for fuse F9.
Is the repair complete?–System OK–
51. Disconnect the rear wiper motor electrical con-
nector.
2. Turn the ignition ON.
3. Check the voltage at the PNK wire of the rear
wiper motor electrical connector.
Does the voltage equal the specified value?11–14 vGo to Step 7Go to Step 6
6Repair the open circuit for the BRN wire between
fuse F9 and connector at the rear wiper motor.
Is the repair complete?–System OK–
7With the rear wiper motor still disconnected, use an
ohmmeter to check continuity between ground and
the BLK wire of the rear wiper motor connector.
Does the ohmmeter indicate the specified value?
0 WGo to Step 9Go to Step 8
8Repair the open ground circuit for the rear wiper mo-
tor.
Is the repair complete?–System OK–
91. Turn the ignition ON.
2. Turn the rear wiper ON.
3. Check the voltage at the WHT wire at the rear
wiper motor connector.
Does the voltmeter indicate the specified value?11–14 vGo to Step 10Go to Step 11
10Replace the rear wiper motor.
Is the repair complete?–System OK–
111. Disconnect the wiper switch electrical connec-
tor.
2. Turn the ignition ON.
3. Check the voltage at terminal A3 (BRN).
Is the voltage equal to the specified value?11–14 vGo to Step 13Go to Step 12
12Repair the open circuit between fuse F9 and the wip-
er switch connector terminal A3.
Is the repair complete?–System OK–

WIPERS/WASHER SYSTEMS 9D – 13
DAEWOO V–121 BL4
REAR WINDOW WASHER SYSTEM (HATCHBACK)
StepActionValue(s)YesNo
1Check the washer fluid level.
Is there fluid in the washer reservoir?–Go to Step 3Go to Step 2
2Fill the washer reservoir.
Is the repair complete?–System OK–
3Verify that the hoses are not obstructed or leaking by
disconnecting the washer hose and blowing through
it toward the reservoir and also toward the nozzle.
Are the hoses obstructed or leaking?–Go to Step 4Go to Step 5
4Repair or replace the hoses.
Is the repair complete?–System OK–
5Check the function of the rear wiper.
Does the rear wiper function correctly?–Go to Step 7Go to Step 6
6Repair the rear wiper.
Is the rear wiper repair complete?–Go to Step 7–
71. Disconnect the electrical connector at the
washer pump.
2. Use an ohmmeter to check continuity between
the BLK wire of the washer pump connector
and ground.
Does the ohmmeter indicate the specified value?
0 WGo to Step 9Go to Step 8
8Repair the open or the high–resistance ground con-
nection.
Is the repair complete?–System OK–
9Check the voltage at the washer pump connector
(LT RED wire) when the rear washer is turned ON.
Is the voltage equal to the specified value?11–14 vGo to Step 10Go to Step 11
10Replace the washer pump.
Is the repair complete?–System OK–
111. Disconnect the wiper switch.
2. Connect an ohmmeter between terminal 3 and
terminal A2 of the wiper switch.
3. Observe the ohmmeter when the switch is
moved to the rear WASH position.
Does the ohmmeter indicate the specified value?
0 WGo to Step 12Go to Step 13
12Repair the open circuit between terminal A2 of the
wiper switch connector and the rear washer pump.
Is the repair complete?–System OK–
13Replace the wiper switch.
Is the repair complete?–System OK–

9E – 6IINSTRUMENTATION/DRIVER INFORMATION
DAEWOO V–121 BL4
DIAGNOSIS
CIGAR LIGHTER
Cigar Lighter Inoperative
StepActionValue(s)YesNo
1Check fuse F19.
Is the fuse 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–
31. Turn the ignition key to ACC.
2. Use a voltmeter to check for voltage at fuse
F19.
Does the battery voltage available at the fuse F19
match the value specified?11–14 vGo to Step 5Go to Step 4
4Repair the open power supply circuit for fuse F19.
Is the repair complete?–System OK–
51. Remove the electrical connector from the back
of the cigar lighter.
2. Turn the ignition key to ACC.
3. Use a voltmeter to check the voltage at the
ORN wire.
Does the battery voltage available at the YEL wire
match the value specified?11–14 vGo to Step 7Go to Step 6
6Repair the open circuit between fuse F19 and the ci-
gar lighter.
Is the repair complete?–System OK–
7With the ignition key still in the ACC position, con-
nect the voltmeter between the YEL and the BLK
wires at the cigar lighter connector.
Does the battery voltage match the value specified?11–14 vGo to Step 9Go to Step 8
8Repair the open ground circuit.
Is the repair complete?–System OK–
9Replace the cigar lighter.
Is the repair complete?–System OK–

9E – 8IINSTRUMENTATION/DRIVER INFORMATION
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
8Repair the open circuit between terminal 5 of the
clock connector and fuse F17.
Is the repair complete?–System OK–
9Check continuity between terminal 3 of the clock
connector and ground.
Does the multimeter indicate the value specified?0 WGo to Step 10Go to Step 11
10Replace the clock.
Is the repair complete?–System OK–
11Repair the open ground circuit between terminal 3
the clock connector and ground G202.
Is the repair complete?–System OK–

INSTRUMENTATION/DRIVER INFORMATION 9E – 9
DAEWOO V–121 BL4
INSTRUMENT PANEL ILLUMINATION
Instrument Panel Illumination Lamps Inoperative
StepActionValue(s)YesNo
1Check fuse Ef28.
Is fuse Ef28 blown?–Go to Step 2Go to Step 3
21. Check for a short circuit and repair it, if neces-
sary.
2. Replace the blown fuse.
Is the repair complete?–System OK–
31. Turn the lamp switch on.
2. Use a voltmeter to check battery voltage at
fuse Ef28.
Does the battery voltage match the value specified?11–14 vGo to Step 5Go to Step 4
4Repair the open power supply circuit to fuse Ef28.
Is the repair complete?–System OK–
5Use an ohmmeter to check the resistance between
ground and the BLK wire of the dimmer control
switch connector.
Is the resistance equal to the specified value?0 WGo to Step 7Go to Step 6
6Repair the open ground circuit.
Is the repair complete?–System OK–
71. Turn the lamp switch on.
2. Use a voltmeter to check for battery voltage at
the DK GRN wire of the dimmer control switch
connector.
Does the battery voltage match the value specified?11–14 vGo to Step 9Go to Step 8
8Repair the open circuit between the DK GRN wire of
the dimmer control switch connector and fuse Ef28.
Is the repair complete?–System OK–
91. Disconnect the dimmer control switch.
2. Turn the lamp switch on.
3. Use a voltmeter to check for battery voltage at
the DK GRN wire of the dimmer control switch
connector.
Does the battery voltage match the value specified?11–14 vGo to Step 11Go to Step 10
10Repair the open circuit between the DK GRN wire of
the dimmer control switch connector and each
lamps.
Is the repair complete?–System OK–
11Replace the dimmer control switch.–System OK–