Mitsubishi Evolution X. Manual — part 950
HEADLIGHT
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CHASSIS ELECTRICAL
54A-161
.
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
54A-162
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
).
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
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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CHASSIS ELECTRICAL
54A-163
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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CHASSIS ELECTRICAL
54A-164
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
.
• 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
.
• 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.
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