2004 DAEWOO LACETTI Reverse switch

7A – 8IHEATING AND VENTILATION SYSTEM
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
20Replace the thermostat. Refer to Section 2D, En-
gine Cooling.
Is the repair complete?–System OK–
21Reinstall the thermostat.
Is the repair complete?–System OK–
22Inspect the heater hoses for proper installation.
Are the heater hoses reversed?–Go to Step 23Go to Step 24
23Reinstall the heater hoses properly.
Is the repair complete?–System OK–
241. Back flush the heater core.
2. Drain the cooling system.
3. Replace the coolant.
4. Warm the engine to an average operating tem-
perature.
5. Feel the heater inlet hose and the heater outlet
hose.
Is the heater inlet hose hot and the heater outlet
hose warm?–System OKGo to Step 25
25Replace the heater core.
Is the repair complete?–System OK–
26Recheck the system using the ”Control Settings/
Correct Results” tests. Refer to ”Improper Air Deliv-
ery or No Mode Shift” in this section.
Is the repair complete?–System OKGo to Step 27
27Check for airflow from the defroster or the vent out-
lets.
Is there high airflow from the defroster or vent out-
lets?–Go to Step 28Go to Step 29
281. Check the heater door at the floor and the vent
door to get the proper airflow and to verify
proper operation.
2. Repair as required.
Is the repair complete?–System OK–
29Switch the mode knob to defrost.
Is the defroster airflow OK?–Go to Step 30Go to Step 31
301. Remove the heater outlet and check for ob-
structions.
2. Remove any obstructions in the heater outlet.
Is the repair complete?–System OK–
31Check for airflow change at various blower speeds.
Does the blower speed increase as the control is
turned from 1 to 4?–Go to Step 32Go to ”Blower
Electrical
(Manual and
Non–A/C)”
32Check for obstructions in the system at the blower
inlet and at the air filter, if the vehicle is equipped with
one.
Are there any obstructions?–Go to Step 33Go to Step 34
33Remove the obstructions in the system at the blower
inlet or replace a clogged filter.
Is the repair complete?–System OK–

9A – 14IBODY WIRING SYSTEM
DAEWOO V–121 BL4
I/P Fuse Block
FuseRating/SourceCircuit
F110AIGN 1SDM
F210AIGN 1TCM, ECM, Generator, VGIS, VSS
F315AIGN 1Hazard Switch
F410AIGN 1Cluster, DRL Module, Chime Bell, Brake Switch,
SSPS Module, A/C Control Switch
F5–Spare–
F610AIGN 2A/C Comp. Relay, Defog Relay, Power Window
Relay, Head Lamp Relay
F720AIGN 2Blower Relay, A/C Control Switch, FATC
F815AIGN 2Electric Mirror Switch, Folding Mirror, Sun Roof
Module
F925AIGN 1Wiper Motor, Wiper Switch
F10–Spare–
F1110AIGN 1EBCM, Oil Feeding Connector
F1210AIGN 1Immobilizer, Anti Theft Control Unit, Rain Sensor
Unit
F1310AB+TCM
F1415AB+Hazard Switch
F1515AB+Anti Theft Control Unit
F1610AB+DLC
F1710AACCAudio, Clock
F1815AACCExtra Power Jack
F1915AACCCigar Lighter
F2010AIGN 1Reverse Lamp Switch, PNP Switch
F2115AB+Rear Fog Relay
F2215AB+Clock, FATC, A/C Control Switch
F2315AB+Audio
F2410AB+Immobilizer

9B – 26ILIGHTING SYSTEMS
DAEWOO V–121 BL4
Backup Lamps Inoperative
StepActionValue(s)YesNo
11. Block the wheels.
2. Apply the parking brake to prevent the vehicle
from moving.
3. Turn the ignition on.
4. Put the transaxle in reverse (R).
5. Remove one of the backup lamps from its
socket.
6. Test the lamp socket positive terminal with a
voltmeter.
Does the battery voltage available at the backup
lamp socket positive terminal equal the specified
value?11–14 vGo to Step 3Go to Step 2
2Repair the open circuit between fuse F20 and the
backup lamps.
Is the repair complete?–System OK–
3Connect an ohmmeter between ground and the neg-
ative terminal at the bulb socket.
Is the resistance equal to the specified value?0 WGo to Step 4Go to Step 5
4Replace the faulty backup lamps.
Is the repair complete?–System OK–
51. Reinstall the backup lamps.
2. Disconnect the electrical connector at the re-
verse switch. (On automatic transaxle (A/T)
vehicles, disconnect the neutral safety/backup
switch.)
3. Turn the ignition on.
4. Put the transaxle in R.
5. Use a voltmeter to check for the reverse switch
terminal 1. (On A/T vehicles, test terminal 7 of
the neutral safety/backup switch).
Does the battery voltage available at terminal 1 (or
terminal 7, if equipped with A/T) equal the specified
value?11–14 vGo to Step 7Go to Step 6
6Repair the open circuit between the backup lamps
and the, reverse switch (or the neutral safety/backup
switch if equipped with A/T).
Is the repair complete?–System OK–
71. Put the transaxle in R.
2. Use an ohmmeter to check the continuity be-
tween reverse switch terminal 1 and terminal 2
(terminals 7 and 8 on the neutral safety/backup
switch, if equipped with A/T).
Does the continuity between terminals 1 and 2 (ter-
minals 7 and 8, if equipped with A/T) equal the speci-
fied value?0 WGo to Step 9Go to Step 8

LIGHTING SYSTEMS 9B – 27
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
8Replace the reverse switch (neutral safety/backup
switch, if equipped with A/T).
Is the repair complete?–System OK–
9Repair the ground circuit between the reverse switch
(neutral safety/backup switch, if equipped with A/T)
and ground G401.
Is the repair complete?–System OK–

LITHING SYSTEMS 9B – 47
DAEWOO V–121 BL4
BACKUP LAMPS
The backup lamps are located in the rear combination
lamps They will come on when the transaxle is shifted into
reverse. On a vehicle with an automatic transaxle, the
backup lamps are activated by the neutral safety backup
(NSBU) switch. On a vehicle with a manual transaxle, they
are activated by a reverse switch which is part of the trans-
axle.

9P – 8IDOORS
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
181. Remove the trim panel from a door which
has an inoperative power window.
2. Move a vehicle battery close enough to the
door so that the window motor can be pow-
ered directly from the battery with jumper
wires.
3. Disconnect the the two–pin window motor
connector in the door.
Important : To prevent the fuse in the jumper wire
from blowing, do not touch the jumper wires togeth-
er.
1. Attach a jumper wire between the battery
negative terminal and one of the terminals in
the two–pin window motor connector.
2. Attach a fused jumper wire between the bat-
tery positive terminal and the remaining ter-
minal in the two–pin window motor connec-
tor. Unless the motor is at the end of its trav-
el, the window should move with the jumpers
attached.
3. To move the window in the opposite direc-
tion, reverse the jumper wire connections at
the window motor connector.
Does the power window operate in both direc-
tions when the motor is operated directly from
a battery?–Go to
Step 20Go to
Step 19
19Replace the window motor.
Is the repair complete?–System
OK–
201. Before reconnecting the two–pin window mo-
tor connector, connect an ohmmeter between
the terminals to check the resistance of the
motor.
2. Record the ohmmeter reading for motor re-
sistance.
3. Reconnect the motor connector and reinstall
the door trim panel.
4. Disconnect the electrical connector from the
dual power window switch.
5. At the dual power window switch connector,
use an ohmmeter to check the resistance
between the terminals which lead to the mo-
tor that was tested in Step 15
Is the resistance at the switch connector
approximately equal to the resistance that
was previously measured at the motor con-
nector?–Go to
Step 22Go to
Step 21
21Repair the open circuit between the window
motor and the window switch.
Is the repair complete?–System
OK–
22Replace the power window switch.
Is the repair complete?–System
OK–

DOORS 9P – 11
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
181. Remove the trim panel from the front door
which has an inoperative power window.
2. Move a vehicle battery close enough to the
door so that the window motor can be pow-
ered directly from the battery with jumper
wires.
3. Disconnect the the two–pin window motor
connector in the door.
Important : To prevent the fuse in the jumper wire
from blowing, do not touch the jumper wires togeth-
er.
1. Attach a jumper wire between the battery
negative terminal and one of the terminals in
the two–pin window motor connector.
2. Attach a fused jumper wire between the bat-
tery positive terminal and the remaining ter-
minal in the two–pin window motor connec-
tor. Unless the motor is at the end of its trav-
el, the window should move with the jumpers
attached.
3. To move the window in the opposite direc-
tion, reverse the jumper wire connections at
the window motor connector.
Does the power window operate in both direc-
tions when the motor is operated directly from
a battery?–Go to
Step 20Go to
Step 19
19Replace the window motor.
Is the repair complete?–System
OK–
201. Before reconnecting the two–pin window mo-
tor connector, connect an ohmmeter between
the terminals to check the resistance of the
motor.
2. Record the ohmmeter reading for motor re-
sistance.
3. Reconnect the motor connector and reinstall
the door trim panel.
4. Disconnect the electrical connector from the
power window switch.
5. At the power window main switch connector,
use an ohmmeter to check the resistance
between the terminals which lead to the mo-
tor that was tested in Step 15.
Is the resistance at the main switch connector
approximately equal to the resistance that
was previously measured at the motor con-
nector?–Go to
Step 22Go to
Step 21
21Repair the open circuit between the window
motor and the window switch.
Is the repair complete?–System
OK–
22Replace the power window switch.
Is the repair complete?–System
OK–

9P – 14IDOORS
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
181. Remove the trim panel from the rear door
which has an inoperative power window.
2. Move a vehicle battery close enough to the
door so that the window motor can be pow-
ered directly from the battery with jumper
wires.
3. Disconnect the the two–pin window motor
connector in the door.
Important : To prevent the fuse in the jumper wire
from blowing, do not touch the jumper wires togeth-
er.
1. Attach a jumper wire between the negative
battery terminal and one of the terminals in
the two–pin window motor connector.
2. Attach a fused jumper wire between the posi-
tive battery terminal and the remaining termi-
nal in the two–pin power window motor con-
nector. Unless the motor is at the end of its
travel, the power window should move with
the jumpers attached.
3. To move the power window in the opposite
direction, reverse the jumper wire connec-
tions at the power window motor connector.
Does the power window operate in both direc-
tions when the motor is operated directly from
a battery?–Go to
Step 20Go to
Step 19
19Replace the power window motor.
Is the repair complete?–System
OK–
201. Make sure the window lock on the main
switch is off.
2. Turn the ignition ON.
3. At the rear power window switch connector,
check the voltage at terminal 1.
Is the voltage equal to the specified value?11–14vGo to
Step 21Go to
Step 29
211. At the power window motor two–pin connec-
tor, use an ohmmeter to measure the resist-
ance of the power window motor. Record the
resistance.
2. Re–connect the two–pin power window motor
connector.
3. Disconnect the rear power window switch
connector.
4. Use an ohmmeter to measure between termi-
nals 2 and 6 of the rear power window switch
connector.
Is the resistance measured at the rear power
window switch connector equal to the resist-
ance previously measured at the rear power
window motor connector?–Go to
Step 23Go to
Step 22
22Repair the open circuit between the rear pow-
er window switch and the rear power window
motor connector.
Is the repair complete?–System
OK–