Turn Signal Light Does Not Illuminate

LIGHTING (EXT): LIGHTING SYSTEM: Turn Signal Light does not Illuminate

Turn Signal Light does not Illuminate

DESCRIPTION

The turn signal flasher receives a turn signal switch signal from the headlight dimmer switch, and illuminates the front turn signal light and rear combination light.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK SWITCH FUNCTION
(a) Check if the hazard warning switch and headlight dimmer switch operate normally.

Result





D -- CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - MULTI-DISPLAY)
C -- CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - DISPLAY AND NAVIGATION MODULE DISPLAY)
B -- INSPECT HEADLIGHT DIMMER SWITCH (TURN SIGNAL SWITCH)
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - BATTERY AND BODY GROUND)
(a) Disconnect the turn signal flasher connector.




(b) Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance:






Standard Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK TURN SIGNAL LIGHT FUNCTION
(a) Check the malfunctioning turn signal light.

Result





B -- CHECK HARNESS AND CONNECTOR (FRONT TURN SIGNAL LIGHT - TURN SIGNAL FLASHER AND BODY GROUND)
A -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT - TURN SIGNAL FLASHER AND BODY GROUND)




(a) Disconnect the E19 turn signal flasher connector.
(b) Disconnect the A41 and K4 light connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






Result





C -- REPAIR OR REPLACE HARNESS OR CONNECTOR
B -- REPLACE REAR COMBINATION LIGHT
A -- REPLACE HEADLIGHT ASSEMBLY
5. CHECK HARNESS AND CONNECTOR (FRONT TURN SIGNAL LIGHT - TURN SIGNAL FLASHER AND BODY GROUND)




(a) Disconnect the E19 turn signal flasher connector.
(b) Disconnect the A47 and L3 light connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






Result





C -- REPAIR OR REPLACE HARNESS OR CONNECTOR
B -- REPLACE REAR COMBINATION LIGHT
A -- REPLACE HEADLIGHT ASSEMBLY
6. INSPECT HEADLIGHT DIMMER SWITCH (TURN SIGNAL SWITCH)




(a) Remove the headlight dimmer switch Component Tests and General Diagnostics.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE HEADLIGHT DIMMER SWITCH
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - TURN SIGNAL FLASHER AND BODY GROUND)




(a) Disconnect the E14 switch connector.
(b) Disconnect the E19 turn signal flasher connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE TURN SIGNAL FLASHER ASSEMBLY
8. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - DISPLAY AND NAVIGATION MODULE DISPLAY)




(a) Disconnect the E19 turn signal flasher connector.
(b) Disconnect the F28 display and navigation module display connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY (HAZARD WARNING SWITCH)
(a) Temporarily replace the display and navigation module display with a new or normally functioning one Removal.
(b) Check the hazard warning switch operation.
OK:
Hazard warning switch operation is normal.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- END (REPLACE DISPLAY & NAVIGATION MODULE DISPLAY)
10. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - MULTI-DISPLAY)




(a) Disconnect the E19 turn signal flasher connector.
(b) Disconnect the F28 multi-display connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
11. CHECK MULTI-DISPLAY (HAZARD WARNING SWITCH)
(a) Temporarily replace the multi-display with a new or normally functioning one Removal.
(b) Check the hazard warning switch operation.
OK:
Hazard warning switch operation is normal.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- END (REPLACE MULTI-DISPLAY)