For 1990-2009 cars

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
1 | Inspect fuse EF15. Is fuse EF15 open? | -- | Go to Step 2 | Go to Step 3
2 |

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

Is the repair complete?

--

System OK

--

3 |

1. Turn the lamp switch ON.
2. Use a voltmeter to check battery voltage at fuse EF15.

Does the battery voltage match the value specified?

11-14 V

Go to Step 5

Go to Step 4

4 | Repair the open power supply circuit to fuse EF15. Is the repair complete? | -- | System OK | --
5 | Use an ohmmeter to check the resistance between ground and the BK wire of the dimmer control switch connector. Is the resistance equal to the specified value? | 0 | Go to Step 7 | Go to Step 6
6 | Repair the open ground circuit. Is the repair complete? | -- | System OK | --
7 |

1. Turn the lamp switch ON.
2. Use a voltmeter to check for battery voltage at the BN/WH wire of the dimmer control switch connector.

Does the battery voltage match the value specified?

11-14 V

Go to Step 9

Go to Step 8

8 | Repair the open circuit between the BN/WH wire of the dimmer control switch connector and fuse EF15. Is the repair complete? | -- | System OK | --
9 |

1. Disconnect the dimmer control switch.
2. Turn the lamp switch ON.
3. Use a voltmeter to check for battery voltage at the L-GN/RD wire of the dimmer control switch connector.

Does the battery voltage match the value specified?

11-14 V

Go to Step 11

Go to Step 10

10 | Repair the open circuit between the L-GN/RD wire of the dimmer control switch connector and each lamps. Is the repair complete? | -- | System OK | --
11 | Replace the dimmer control switch. Is the replacement complete? | -- | System OK | --