Illumination Does Not Come On Or Cannot Dim

WARNING: This page is about a different variant/trim than selected.

Trouble symptom:

Even when the lighting switch is operated, the illumination does not come on. Even when the illumination control is operated, the illumination does not dim.

Trouble symptom:

Open circuit in illumination circuit

Wiring diagram:

Clearance light and illumination light system Ref. to WIRING SYSTEM (IMPREZA MODEL)> CLEARANCE LIGHT AND ILLUMINATION LIGHT SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (EXCEPT FOR HEV))> CLEARANCE LIGHT AND ILLUMINATION LIGHT SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to AIR CONDITIONER (DIAGNOSTICS) (EXCEPT FOR HEV)> GENERAL DESCRIPTION> CAUTION .

CHECK ILLUMINATION .
Make sure that all illuminations except A/C come on.

Do other illuminations come on?

Yes: Go to 2.

No: Check the illumination circuit. Ref. to LIGHTING SYSTEM> CLEARANCE LIGHT AND ILLUMINATION LIGHT SYSTEM>INSPECTION .
CHECK CONNECTOR .
Check for poor contact of connector.

Is the check result OK?

Yes: Go to 3.

No: Repair the connector.
CHECK HARNESS (OPEN CIRCUIT) .
1. Turn the lighting switch to ON.
2. Using a tester, measure the voltage between the A/C control panel connector and chassis ground.
  Connector and terminal
  
  (i88) No. 39 (+) - Chassis ground (-):
  
  Is the voltage 10 V or more?
  
  Yes: Go to 4.
  
  No: Repair or replace the open circuit of harness.
CHECK HARNESS (OPEN CIRCUIT) .
1. Turn the lighting switch to OFF.
2. Measure the resistance between A/C control panel connector and combination meter connector.
  Connector and terminal
  
  (i88) No. 29 - (i10) No. 34:
  
  Is the resistance less than 10 Ω?
  
  Yes: Replace the A/C control panel Ref. to AIR CONDITIONER (EXCEPT FOR HEV)> CONTROL PANEL .
  
  No: Repair or replace the open circuit of harness.