GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2007 🢒 Wave HB 🢒 Body Systems 🢒 Lighting 🢒 Dome Lamps Inoperative

Dome Lamps Inoperative Hatchback

Test Description

The number below refers to the step number on the diagnostic table.

  1. Bulb test--Clip one end of a jumper wire to the negative battery terminal. Clip the other end of the jumper wire onto one end of the bulb. Take the free end of the bulb, the end without the jumper attached, and touch it to the positive battery terminal.

Step

Action

Values

Yes

No

Caution: Do not connect a jumper cable directly to the negative terminal of a discharged battery to prevent sparking and possible explosion of battery gases.

1

  1. Remove the interior courtesy lamp bulb and inspect the filament.
  2. If the filament is not broken, test the bulb using the vehicle's battery and a jumper wire.

Does the bulb pass the visual and physical inspections?

--

Go to Step 3

Go to Step 2

2

Replace the bulb.

Is the repair complete?

--

System OK

--

3
  1. Reinstall the interior courtesy lamp bulb.
  2. Test fuse EF22.

Is fuse EF22 open?

--

Go to Step 4

Go to Step 5

4
  1. Test for a short circuit and repair, if necessary.
  2. Replace the fuse.

Is the repair complete?

--

System OK

--

5

Test fuse EF22.

Does the voltage at fuse EF22 equal the specified value?

11-14 V

Go to Step 7

Go to Step 6

6

Repair the open power supply circuit for fuse EF22.

Is the repair complete?

--

System OK

--

7
  1. Disconnect the interior courtesy lamp electrical connector.
  2. Measure the voltage at connector terminal 2.

Does the voltage at connector terminal 2 equal the value specified?

11-14 V

Go to Step 8

Go to Step 9

8

Repair the open circuit between fuse EF22 and the interior courtesy lamp terminal 2.

Is the repair complete?

--

System OK

--

9
  1. With the interior courtesy lamp disconnected, turn it to the ON position.
  2. Use an ohmmeter to measure the resistance between the ground and the courtesy lamp ground terminal of the interior courtesy lamp connector, harness side.

Does the ohmmeter indicate continuity?

--

Go to Step 10

Go to Step 11

10

Replace the interior courtesy lamp switch assembly.

Is the repair complete?

--

System OK

--

11

Repair the ground circuit for the interior courtesy lamp.

Is the repair complete?

--

System OK

--

Dome Lamps Inoperative Notchback

Test Description

The number below refer to the step numbers on the diagnostic table.

  1. Bulb test. Clip one end of a jumper wire to the negative battery terminal. Clip the other end of the jumper wire onto one end of the bulb. Take the free end of the bulb (the end without the jumper attached) and touch it to the positive battery terminal.

Step

Action

Values

Yes

No

 

1

  1. Remove the interior courtesy lamp bulb and inspect the filament.
  2. If the filament is not broke, test the bulb using the vehicles battery and a jumper wire.

Does the bulb pass the visual and physical checks?

--

Go to Step 3

Go to Step 2

2

Replace the bulb.

Is the repair complete?

--

System OK

--

3
  1. Reinstall the interior courtesy lamp bulb.
  2. Check fuse Ef1 and F12.

Is the fuse Ef1 and F12 blown?

--

Go to Step 4

Go to Step 5

4
  1. Check for a short circuit and repair it, if necessary.
  2. Replace the fuse.

Is the repair complete?

--

System OK

--

5

Check fuses Ef1 and F12.

Does the voltage at fuse Ef1 and F12 equal the specified value?

11-14V

Go to Step 7

Go to Step 6

6

Repair the open power supply circuit for fuse Ef1 and F12.

Is the repair complete?

--

System OK

--

7
  1. Disconnect the interior courtesy lamp electrical connector.
  2. Check the voltage at connector terminal 2 (7 with sunroof).

Does the voltage at connector terminal 2 (7 with sunroof) equal the value specified?

11-14V

Go to Step 8

Go to Step 9

8

Repair the open circuit between fuse Ef1, F12 and the interior courtesy lamp terminal 2 (7 with sunroof).

Is the repair complete?

--

System OK

--

9
  1. With the interior courtesy lamp disconnected turn it to the on position.
  2. Use an ohmmeter to check the resistance between ground and terminal 1 (5 with sunroof) of the interior courtesy lamp connector (harness side).

Is the resistance within the specified value?

<1.0 ohms

Go to Step 10

Go to Step 11

10

Replace the interior courtesy lamp switch assembly.

Is the repair complete?

--

System OK

--

11

Repair the ground circuit for the interior courtesy lamp.

Is the repair complete?

--

System OK

--