Mitsubishi Galant (2004+). Manual - part 278

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-303

General circuit diagram for the taillights

General circuit diagram for the headlights

IGNITION
SWITCH (IG1)

ETACS-
ECU

FRONT-
ECU

RELAY BOX

COLUMN-ECU

LIGHTING 
SWITCH

BATTERY

DATA LINK
CONNECTOR

FRONT

COMBINATION
LIGHT 

(RH)

REAR

COMBINATION
LIGHT 

(RH)

REAR

COMBINATION
LIGHT 

(LH)

FRONT

COMBINATION
LIGHT 

(LH)

LICENSE
PLATE

LIGHT

FRONT 

SIDE

MARKER
LIGHT 

(LH)

(RH)

COLUMN SWITCH

JUNCTION BLOCK

RELAY BOX
  (FUSE    )

22

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-304

IGNITION
SWITCH (IG1)

RELAY BOX
  (FUSE    )

22

ETACS-
ECU

FRONT-ECU

RELAY BOX

LIGHTING

SWITCH

DIMMER ·

P

ASSING

SWITCH

BATTERY

COLUMN-ECU

COLUMN SWITCH

HEAD

LIGHT 

(LH)

HEAD

LIGHT 

(RH)

DOOR
SWITCH (LH)

DATA LINK
CONNECTOR 

JUNCTION BLOCK

2-bulb type

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-305

IGNITION
SWITCH (IG1)

RELAY BOX
  (FUSE    )

22

ETACS-
ECU

COLUMN-ECU

COLUMN SWITCH

FRONT-ECU

RELAY BOX

BATTERY

HEAD

LIGHT

(LOW: LH)

(LOW: RH)

(HIGH: LH)

(HIGH: RH)

DOOR
SWITCH (LH)

DATA LINK
CONNECTOR 

LIGHTING

SWITCH

DIMMER 

·

P

ASSING

SWITCH

JUNCTION BLOCK

4-bulb type

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-306

RELAY BOX
(FUSE     )

22

IGNITION 
SWITCH (IG1)

ETACS-
ECU

CPU

JUNCTION
BLOCK

COMBINATION
METER