For 1990-2009 cars

### Test Description

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

1. Bulb test--Clip 1 end of a jumper wire to the negative battery terminal. Clip the other end of the jumper wire onto 1 end of the bulb. Take the end of the bulb 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 broken, test the bulb using the vehicle's 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. Inspect fuse EF11.

Is either fuse EF11 open?

--

Go to Step 4

Go to Step 5

4 |

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

Is the repair complete?

--

System OK

--

5 |

1. Disconnect the interior courtesy lamp electrical connector.
2. Measure the voltage at connector terminal 3.

Does the voltage at connector terminal 3 measure within the specified range?

11-14 V

Go to Step 6

Go to Step 7

6 | Repair the open circuit between fuse EF11 and the interior courtesy lamp terminal 3. Is the repair complete? | -- | System OK | --
7 | Use an ohmmeter to measure the resistance between the interior courtesy lamp connector 1 and ground on the harness side. Is the resistance equal to the specified value? | 0 Ω | Go to Step 8 | Go to Step 9
8 | Replace the interior courtesy lamp switch assembly. Is the repair complete? | -- | System OK | --
9 | Repair the ground circuit for the interior courtesy lamp. Is the repair complete? | -- | System OK | --