Mitsubishi Evolution X. Manual - part 950

HEADLIGHT

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CHASSIS ELECTRICAL

54A-161

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TECHNICAL DESCRIPTION (COMMENT)

If any of the tail lights, the position lights or the 
license plate lights does not Illuminate, the harness, 
connector(s), or bulb(s) may have a problem, or the 
fuse may be burned out.

.

TROUBLESHOOTING HINTS

• Malfunction of bulbs

• Malfunction of rear combination light

• Malfunction of rear combination light harness

• Malfunction of license plate light

• Malfunction of headlight

• Malfunction of tail light

• The wiring harness or connectors may have 

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

DIAGNOSIS

Required Special Tools:

• MB992006: Extra fine probe

• MB991223: Harness set

AC708949AH

Connector: A-40

A-40 (B)

AC708948AH

Connector: A-57

A-57 (B)

AC708950

Connector: C-43

BG

C-43 (B)

AC708972

Connectors: C-304, C-311

AW

C-311

C-304

AC708955AL

Connector: D-17

D-17 (BR)

AC708970AJ

Connectors: F-07, F-15, F-18, F-24, F-27

F-27

F-15 (GR)

F-18 (GR)

F-24 (GR)

F-07 (GR)

HEADLIGHT

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CHASSIS ELECTRICAL

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STEP 1. Rear combination light (taillight) check.
Q: Does the rear combination light (taillight) illuminate 

normally?
YES : Go to Step 2.
NO :  Check the taillight (Refer to trouble symptom chart 

P.54A-209

).

STEP 2. Check headlight assembly connector A-40 
(position light-LH) or A-57 (position light-RH), tail light 
connector F-24 (LH) or F-07 (RH) or license plate light 
connector F-18 (LH) or F-15 (RH) for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Is headlight assembly connector A-40 (position 

light-LH) or A-57 (position light-RH), tail light connector 
F-24 (LH) or F-07 (RH) or license plate light connector 
F-18 (LH) or F-15 (RH) 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

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STEP 3. Bulb check.
Check the bulb(s) of the light that does not illuminate.
Q: Is the check result normal?

YES : Go to Step 4.
NO :  Replace the bulb(s) of the light that does not 

illuminate.

HEADLIGHT

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STEP 4. Resistance measurement at headlight assembly 
connector A-40 (position light-LH) or A-57 (position 
light-RH), tail light connector F-24 (LH) or F-07 (RH) or 
license plate light connector F-18 (LH) or F-15 (RH).
(1) Disconnect the connector, and measure at the wiring 

harness side.

(2) Measure the resistance between the connector of light 

which does not illuminate and the body ground.

•

Measure the resistance between headlight assembly 
connector A-40 (LH) or A-57 (RH) (terminal 6) and body 
ground.

•

Measure the resistance between tail light connector 
F-24 (LH) or F-07 (RH) (terminal 1) and body ground.

•

Measure the resistance between license plate light con-
nector F-18 (LH) or F-15 (RH) (terminal 1) and body 
ground.

OK: The measured value should be continuity 
exists (2 

Ω or less).

Q: Does the measured resistance value correspond with 

this range?
YES : Go to Step 6.
NO :  Go to Step 5.

AC709322 AJ

Harness side: A-40, A-57

AC709322 AK

Harness side: F-07, F-24

AC709322 AL

Harness side: F-15, F-18

HEADLIGHT

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STEP 5. Check the wiring harness between headlight 
assembly connector, tail light connector or license plate 
light connector and the body ground.
Check the ground line for open circuit.

• Check the wiring harness between headlight assembly (LH) 

connector A-40 (terminal 6) and the body ground. <position 
light-LH>

• Check the wiring harness between headlight assembly (RH) 

connector A-57 (terminal 6) and the body ground. <position 
light-RH>

• Check the wiring harness between tail light (LH) connector 

F-24 (terminal 1) and the body ground. <tail light-LH>
NOTE: Also check intermediate connector F-27 for loose, 
corroded, or damaged terminals, or terminals pushed back 
in the connector. If intermediate connector F-27 is dam-
aged, repair or replace the connector as described in 
GROUP 00E, Harness Connector Inspection 

P.00E-2

.

• Check the wiring harness between tail light (RH) connector 

F-07 (terminal 1) and the body ground. <tail light-RH>
NOTE: Also check intermediate connector F-27 for loose, 
corroded, or damaged terminals, or terminals pushed back 
in the connector. If intermediate connector F-27 is dam-
aged, repair or replace the connector as described in 
GROUP 00E, Harness Connector Inspection 

P.00E-2

.

• Check the wiring harness between license plate light (LH) 

connector F-18 (terminal 1) and the body ground. <license 
plate light-LH>

• Check the wiring harness between license plate light (RH) 

connector F-15 (terminal 1) and the body ground. <license 
plate light-RH>

Q: Is the wiring harness between headlight assembly 

connector, tail light connector or license plate light 
connector and the body ground in good condition?
YES : Go to Step 8.
NO :  Repair the wiring harness.

STEP 6. Check ETACS-ECU connector C-304 <position 
light> or C-311 <tail light or license plate light> for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is ETACS-ECU connector C-304 <position light> or 

C-311 <tail light or license plate light> in good 
condition?
YES : Go to Step 7.
NO :  Repair the damaged parts.