Mitsubishi Montero (2004+). Manual - part 774

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-353

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.

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

SIMPLIFIED WIRING SYSTEM (SWS)

54B-354

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.

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.

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

SIMPLIFIED WIRING SYSTEM (SWS)

54B-355

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

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-356

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