Operating Light Control Rheostat Does Not Change Light Brightness
METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: Operating Light Control Rheostat does not Change Light Brightness
- Operating Light Control Rheostat does not Change Light Brightness
DESCRIPTION
When the light control rheostat dial is turned upward, the combination meter and vehicle interior illumination will become brighter. When the light control rheostat dial is turned downward, the combination meter and vehicle illumination will dim.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. READ VALUE USING TECHSTREAM (LIGHT CONTROL RHEOSTAT)
(a) Operate the Techstream according to the display and select the Data List Meter / Gauge System.
Combination Meter
*: w/ TAIL Cancel Switch
OK:
Light brightness can be changed within specified range by manual operation.
NG -- INSPECT LIGHT CONTROL RHEOSTAT
OK -- REPLACE COMBINATION METER ASSEMBLY Removal
2. INSPECT LIGHT CONTROL RHEOSTAT
w/o TAIL Cancel Switch:
(a) Inspect the light control rheostat.
(1) Remove the light control rheostat Removal.
(2) Measure the resistance according to the table below.
Standard Resistance:
w/ TAIL Cancel Switch:
(b) Inspect the light control rheostat.
(1) Remove the light control rheostat Removal.
(2) Measure the resistance according to the table below.
Standard Resistance:
NG -- REPLACE LIGHT CONTROL RHEOSTAT Removal
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (COMBINATION METER - LIGHT CONTROL RHEOSTAT)
(a) Disconnect the F14 meter connector.
(b) Disconnect the F5 rheostat connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
*: w/ TAIL Cancel Switch
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. REPLACE COMBINATION METER ASSEMBLY
(a) Replace the combination meter assembly with a new or normally functioning one. Perform an operation inspection.
OK:
Combination meter assembly operates normally.
NG -- GO TO LIGHTING SYSTEM Exterior Lighting System
OK -- END