LIGHTING SYSTEMS 9B – 25
DAEWOO V–121 BL4
Turn Signal Lamps and Hazard Lamps Do Not Work
Step Action Value(s) Yes No
1 Check fuses F3 and EF12.
Is either 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 ignition ON.
2. Check the voltage at fuse EF12 and F3.
Is the voltage equal to the specified value?
11–14 v Go to Step 4 Go to Step 7
4
1. Turn the hazard switch ON.
2. Remove each of the inoperative lamps from its
socket.
3. Test each lamp socket positive terminal with a
voltmeter.
Is the voltage equal to the specified value?
11–14 v Go to Step 5 Go to Step 9
5 At each bulb socket, use an ohmmeter to check the
ground circuit.
Is the resistance equal to the specified value?
[ 0 W Go to Step 6 Go to Step 8
6 Replace any faulty turn signal/hazard bulbs.
Is the repair complete?
System OK
7 Repair the power supply circuit to fuses.
Is the repair complete?
System OK
8 Repair the open ground wires.
Is the repair complete?
System OK
9
1. Turn the hazard lamps ON.
2. Test blinker unit connector terminal 49a with a
voltmeter.
Is the voltage equal to the specified value?
11–14 v Go to Step 15 Go to Step 10
10
1. Turn the hazard lamps ON.
2. Test blinker unit connector terminal 49 with a
voltmeter.
Is the voltage equal to the specified value?
11–14 v Go to Step 11 Go to Step 14
11
1. Disconnect the blinker unit from the connector.
2. Use an ohmmeter to check between ground
and the connector for terminal 31 of the blinker
connector.
Is the resistance equal to the specified value?
[ 0 W Go to Step 13 Go to Step 12
12 Repair the blinker unit ground circuit.
Is the repair complete?
System OK
13 Replace faulty blinker unit.
Is the repair complete?
System OK
14
1. Disconnect the hazard switch connector.
2. Check for voltage at terminal 8.
3. Turn the ignition ON.
4. Check for voltage at terminal 10.
Does the voltage available at both terminals equal
the specified value?
11–14 v Go to Step 16 Go to Step 15
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