Mitsubishi Galant (2004+). Manual - part 300

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-391

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TECHNICAL DESCRIPTION (COMMENT)
If the right or left turn-signal light does not illuminate, 
their bulb may be defective.

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TROUBLESHOOTING HINTS

• The turn-signal light bulb may be defective

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

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AC305210AE

CONNECTOR: A-18

A-18 (GR)

AC305206 AN

CONNECTOR: A-34

A-34 (GR)

AC305415

CONNECTORS: C-204, C-214

AQ

C-204

C-214

AC305413AB

CONNECTOR: C-219

JUNCTION BLOCK

(REAR VIEW)

AC305260

F-09

F-03

CONNECTORS: F-03, F-09

AE

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-392

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check the hazard warning light.
Q: Which turn-signal light does not illuminate?

front turn-signal light (LH) : Go to Step 2.
front turn-signal light (RH) : Go to Step 8.
rear combination light (LH) : Go to Step 14.
rear combination light (RH) : Go to Step 20.
Turn signal indicators : Refer to Inspection Procedure I-4 

"The turn-signal light indicator does not illuminate 
normally 

P.54B-404

."

LH side only : Refer to Inspection Procedure I-1 

"Turn-signal lights do not flash when the turn-signal 
light switch is turned on 

P.54B-381

."

RH side only : Refer to Inspection Procedure I-1 

"Turn-signal lights do not flash when the turn-signal 
light switch is turned on 

P.54B-381

."

Both LH and RH sides : Refer to Inspection Procedure I-2 

"Hazard warning lights do not flash when the hazard 
warning light switch is turned on 

P.54B-388

."

STEP 2. Check front combination light (LH) connector A-18 
for loose, corroded or damaged terminals, or terminals 
pushed back in the connector.

Q: Is front combination light (LH) connector A-18 in good 

condition?
YES : Go to Step 3.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the turn-signal lights illuminate 

normally.

STEP 3. Check the front turn-signal light bulb (LH).
(1) Remove the front turn-signal (LH) light bulb.
(2) Verify that the front turn-signal light bulb (LH) is not 

damaged or burned out.

Q: Is the front turn-signal (LH) light bulb in good 

condition?
YES : Go to Step 4.
NO :  Replace the front turn-signal (LH) light bulb. Verify 

that the turn-signal lights illuminate normally.

AC305210

A-18 (GR)

CONNECTOR: A-18

AL

HARNESS SIDE

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-393

STEP 4. Check the ground circuit to the ETACS-ECU. 
Measure the resistance at front combination light (LH) 
connector A-18.

(1) Disconnect front combination light (LH) connector A-18 and 

measure the resistance available at the wiring harness side 
of the connector.

(2) Measure the resistance value between terminal 2 and 

ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 6.
NO :  Go to Step 5.

STEP 5. Check the wiring harness between front 
combination light (LH) connector A-18 (terminal 2) and 
ground.

Q: Is the wiring harness between front combination light 

(LH) connector A-18 (terminal 2) and ground in good 
condition?
YES : Replace the front combination light socket (LH). Verify 

that the turn-signal lights illuminate normally.

NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. Verify that 
the turn-signal lights illuminate normally.

AC305210

A-18 (GR)

CONNECTOR: A-18

AL

HARNESS SIDE

AC209364GO

CONNECTOR A-18
(HARNESS SIDE)

AC305210

A-18 (GR)

CONNECTOR: A-18

AL

HARNESS SIDE

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-394

STEP 6. Check ETACS-ECU connector C-219 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.

Q: Is ETACS-ECU connector C-219 in good condition?

YES : Go to Step 7.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the turn-signal lights illuminate 

normally.

STEP 7. Check the wiring harness between front 
combination light (LH) connector A-18 (terminal 1) and 

ETACS-ECU connector C-219 (terminal 14).

AC305413AB

CONNECTOR: C-219

JUNCTION BLOCK

(REAR VIEW)

AC305210

A-18 (GR)

CONNECTOR: A-18

AL

HARNESS SIDE

AC305413AB

CONNECTOR: C-219

JUNCTION BLOCK

(REAR VIEW)