Daewoo Nubira Owner's Manual page 281

Step
1 Turn the ignition ON.
Is the brake warning lamp always on?
2 Check the ABS warning lamp.
Is the ABS warning lamp also on?
3 Use a scan tool to check for diagnostic trouble codes
(DTCs) and follow the procedures for any DTCs
found.
Is the lamp still on?
4 Release the parking brake fully.
Is the lamp off?
5 Check the brake fluid level.
Is the fluid level OK?
6
1. Fill the brake fluid reservoir with clean DOT 3
equivalent hydraulic fluid.
2. Replace the cap on the fluid reservoir.
Is the lamp on?
7 Disconnect the harness connector from the brake
fluid level switch.
Is the lamp on?
8 Replace the brake fluid level switch.
Is the repair complete?
9
1. Connect the brake fluid level switch.
2. Disconnect the parking brake switch.
Is the lamp on?
10 Replace the parking brake switch.
Is the repair complete?
11 Connect the parking brake switch.
Is the vehicle equipped with ABS?
12
1. Turn the ignition OFF.
2. Disconnect the electronic brake control module
(EBCM) connector.
3. Turn the ignition ON.
Is the lamp on?
13 Replace the electronic brake control module
(EBCM).
Is the repair complete?
14
1. Turn the ignition OFF.
2. Connect the EBCM connector.
3. Check for a short to ground in the wiring be-
tween the instrument cluster terminal A2 and
the brake fluid level switch.
Is the problem found?
15 Check for a short to ground in the wiring between the
instrument cluster terminal A2 and the parking brake
switch.
Is the problem found?
DAEWOO V–121 BL4
Brake Lamp Warning Circuit Diagnosis
Action
HYDRAULIC BRAKES 4A – 7
Value(s) Yes
Go toStep 2
Go toStep 3
Go toStep 4
System OK
Go toStep 7
Go toStep 7
Go toStep 9
System OK
Go toStep 11
System OK
Go toStep 12
Go toStep 14
System OK
Go toStep 17
Go toStep 17
No
Go toStep 18
Go toStep 4
System OK
Go toStep 5
Go toStep 6
System OK
Go toStep 8
Go toStep 10
Go toStep 14
Go toStep 13
Go toStep 15
Go toStep 16