Mitsubishi Montero (2002-2004). Manual - part 329

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-363

STEP 14. Check headlight (LH) bulb.
(1) Remove the headlight (LH) bulb.
(2) Verify that the headlight (LH) bulb is not damaged or burned 

out.

Q: Is headlight (LH) bulb normal?

YES : Go to Step 15.
NO :  Replace the headlight (LH) bulb. Verify that the 

headlights illuminate normally.

STEP 15. Check headlight (LH) connector A-20 and front-
ECU connector A-07X for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are headlight (LH) connector A-20 and front-ECU 

connector A-07X in good condition?
YES : Go to Step 16.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the headlights illuminate normally.

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204167

CONNECTOR : A-20

HARNESS 
SIDE

A-20(B)

A-20(B)

AI

2

1

Y

3

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-364

STEP 16. Check the wiring harness between headlight (LH) 
connector A-20 (terminal 3) and front-ECU connector A-
07X (terminal 2).
NOTE: Also check joint connector A-15 for loose, corroded, or 
damaged terminals, or terminals pushed back in the connector. 
If joint connector A-15 is damaged, Repair or replace the dam-
aged component(s) as described in GROUP 00E, Harness 
Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between headlight (LH) connector 

A-20 (terminal 3) and front-ECU connector A-07X 
(terminal 2) in good condition?
YES : No action is necessary and testing is complete.
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 headlights illuminate normally.

STEP 17. Check headlight (RH) bulb.
(1) Remove the headlight (RH) bulb.
(2) Verify that the headlight (RH) bulb is not damaged or 

burned out.

Q: Is headlight (RH) bulb normal?

YES : Go to Step 18.
NO :  Replace the headlight (RH) bulb. Verify that the 

headlights illuminate normally.

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204185

CONNECTORS : A-15, A-20

A-20(B)

A-15

AB

A-15

HARNESS SIDE

A-20(B)

2

1

Y

3

14

13

4

1112

5

3

10

8 9

2

7

1

6

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-365

STEP 18. Check headlight (RH) connector A-32 and front-
ECU connector A-07X for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are headlight (RH) connector A-32 and front-ECU 

connector A-07X in good condition?
YES : Go to Step 19.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the headlights illuminate normally.

STEP 19. Check the wiring harness between headlight (RH) 
connector A-32 (terminal 3) and front-ECU connector A-
07X (terminal 2).
Q: Is the wiring harness between headlight (RH) connector 

A-32 (terminal 3) and front-ECU connector A-07X 
(terminal 2) in good condition?
YES : No action is necessary and testing is complete.
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 headlights illuminate normally.

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204166

CONNECTOR : A-32

HARNESS 
SIDE

A-32(B)

A-32(B)

AE

2

1

Y

3

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204166

CONNECTOR : A-32

HARNESS 
SIDE

A-32(B)

A-32(B)

AE

2

1

Y

3

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-366

Inspection Procedure J-8: Headlight and Taillight: The high-beam indicator light does not illuminate.

High-beam Indicator Light Circuit

ACX02274

FUSIBLE LINK (2)

AC

BATTERY

AC204170

CONNECTORS : D-04, D-28

BN

D-04(GR)

D-28