GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Optra 🢒 Body 🢒 Lighting Systems 🢒 Backup Lamps Inoperative

Step

Action

Values

Yes

No

Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Lighting Systems Connector End Views

1
  1. 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 measure within the specified range?

11-14 V

Go to Step 3

Go to Step 2

2

Repair the open circuit between fuse F20 and the backup lamps.

Did you complete the repair?

--

System OK

--

3

Connect an ohmmeter between ground and the negative terminal at the bulb socket.

Is the resistance equal to the specified value?

0 ohms

Go to Step 4

Go to Step 5

4

Replace the faulty backup lamps.

Did you complete the replacement?

--

System OK

--

5
  1. Reinstall the backup lamps.
  2. Disconnect the electrical connector at the reverse switch. On automatic transaxle (A/T) vehicles, disconnect the neutral safety/backup switch.
  3. Turn the ignition ON.
  4. Put the transaxle in reverse (R).
  5. Use a voltmeter to inspect 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, measure within the specified range?

11-14 V

Go to Step 7

Go to Step 6

6

Repair the open circuit between the backup lamps and the reverse switch, or the neutral safety/backup switch if equipped with A/T.

Did you complete the repair?

--

System OK

--

7
  1. Put the transaxle in reverse (R).
  2. Use an ohmmeter to check the continuity between 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, or terminals 7 and 8, if equipped with A/T, equal the specified value?

0 ohms

Go to Step 9

Go to Step 8

8

Replace the reverse switch, or the neutral safety/backup switch, if equipped with A/T.

Did you complete the replacement?

--

System OK

--

9

Repair the ground circuit between the reverse switch, or the neutral safety/backup switch, if equipped with A/T, and ground G401.

Did you complete the repair?

--

System OK

--