Lighting and Turn Signal Switch Inspection

Precautions: Precautions for Headlight Auto Leveling System Service · Precautions for Body, Cab and Accessories · General safety (00)

Reference: Lighting and Turn Signal Switch Removal and Installation

Check continuity between terminals at each switch position. If check result is not as specified, replace switch.

With Rear Fog Light

Auto-on headlight

[A]:	Lighting switch	[C]:	Turn signal switch
[B]:	Dimmer / Passing switch	[D]:	Rear fog light switch

Non-auto-on headlight

[A]:	Lighting switch	[C]:	Turn signal switch
[B]:	Dimmer / Passing switch	[D]:	Rear fog light switch

Dimmer / Passing switch and lighting switch continuity (Auto-on headlight)

[A]:

Terminal

[B]:

Switch position

Dimmer / Passing switch and lighting switch continuity (Non-auto-on headlight)

[A]:

Terminal

[B]:

Switch position

NOTE:

Dimmer / Passing switch does not have dead point. (Both high and low beam lights light up simultaneously at transition point.)

Turn signal switch continuity

[A]:

Terminal

[B]:

Switch position

Rear fog light switch continuity

[A]:

Terminal

[B]:

Switch position

Without Rear Fog Light

Auto-on headlight

[A]:	Lighting switch	[D]:	LHD
[B]:	Dimmer / passing switch	[E]:	RHD
[C]:	Turn signal switch

Non-auto-on headlight

[A]:	Lighting switch	[D]:	LHD
[B]:	Dimmer / passing switch	[E]:	RHD
[C]:	Turn signal switch

Dimmer / Passing switch and lighting switch continuity (Auto-on headlight)

[A]:

Terminal

[B]:

Switch position

Dimmer / Passing switch and lighting switch continuity (Non-auto-on headlight)

[A]:

Terminal

[B]:

Switch position

NOTE:

Dimmer / Passing switch does not have dead point. (Both high and low beam lights light up simultaneously at transition point.)

Turn signal switch continuity

[A]:

Terminal

[B]:

Switch position