Inspection Procedure I-6

Headlight, Tail Light: Tail Lights, the Position Lights or the License Plate Lights do not Illuminate.

Taillights, Position Lights And License Plate Lights Circuit:

Connectors:

TECHNICAL DESCRIPTION (COMMENT)
If the position lights, the tail lights or the license plate lights do not illuminate, their bulb may be defective.

TROUBLESHOOTING HINTS
- Malfunction of the position light bulb
- Malfunction of the stop/tail light bulb
- Malfunction of the license plate light bulb
- Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:
- MB991223: Test Harness Set

STEP 1. Check the operation of each light.

Q: Which light does not illuminate?
tail light (LH), position light (LH) and license plate light: Go to Step 2.
tail light (RH) and position light (RH): Go to Step 4.
tail light (LH) and license plate light: Go to Step 6.
tail light (LH): Go to Step 8.
tail light (RH): Go to Step 14.
position light (LH): Go to Step 20.
position light (RH): Go to Step 26.
license plate light: Go to Step 32.
All lights : Refer to Inspection Procedure I-1 "Tail lights do not illuminate."







STEP 2. Check rear combination light (LH) connector F-12 and front-ECU connector A-10X for damage.

Q: Are rear combination light (LH) connector F-12 and front-ECU connector A-10X in good condition?

YES: Go to Step 3.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The tail light (LH), position light (LH) and the license plate lights should illuminate normally.










STEP 3. Check the wiring harness between rear combination light (LH) connector F-12 and front-ECU connector A-10X.

NOTE: Also check intermediate connectors C-66 and C-67. If intermediate connector C-66 or C-67 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between rear combination light (LH) connector F-12 and front-ECU connector A-10X in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. The tail light (LH), position light (LH) and the license plate lights should illuminate normally.







STEP 4. Check rear combination light (RH) connector F-10 and front-ECU connector A-10X for damage.

Q: Are rear combination light (RH) connector F-10 and front-ECU connector A-10X in good condition?

YES: Go to Step 5.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The position light (RH) and the tail light (RH) should illuminate normally.













STEP 5. Check the wiring harness between rear combination light (RH) connector F-10 and front-ECU connector A-10X.

NOTE: Also check intermediate connectors C-66 and C-71. If intermediate connector C-66 or C-71 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between rear combination light (RH) connector F-10 and front-ECU connector A-10X in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. The position light (RH) and the tail light (RH) should illuminate normally.







STEP 6. Check rear combination light (LH) connector F-12 and front-ECU connector A-10X for damage.

Q: Are rear combination light (LH) connector F-12 and front-ECU connector A-10X in good condition?

YES: Go to Step 7.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The tail light (LH) and the license plate lights should illuminate normally.










STEP 7. Check the wiring harness between rear combination light (LH) connector F-12 and front-ECU connector A-10X.

NOTE: Also check intermediate connectors C-66 and C-67. If intermediate connector C-66 or C-67 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between rear combination light (LH) connector F-12 and front-ECU connector A-10X in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. The tail light (LH) and the license plate lights should illuminate normally.

STEP 8. Check the stop/tail light bulb (LH).
1. Remove the stop/tail light bulb (LH).
2. Check that the stop/tail light bulb (LH) is not broken.

Q: Is the stop/tail light bulb (LH) in good condition?

YES: Go to Step 9.

NO: Replace the stop/tail light bulb (LH). Check that the tail light (LH) illuminates normally.




STEP 9. Measure at rear combination light (LH) connector F-12 in order to check the ground circuit to the rear combination light (LH).
1. Disconnect rear combination light (LH) connector F-12, and measure at the wiring harness side.
2. Measure the resistance value between terminal 5 and ground.
- The measured value should be 2 ohm or less.

Q: Does the measured resistance value correspond with this range?

YES: Go to Step 12.

NO: Go to Step 10.




STEP 10. Check rear combination light (LH) connector F-12 for dam age.

Q: Is rear combination light (LH) connector F-12 in good condition?

YES: Go to Step 11.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the tail light (LH) illuminates normally.




STEP 11. Check the wiring harness between rear combination light (LH) connector F-12 and ground.

Q: Is the wiring harness between rear combination light (LH) connector F-12 and ground in good condition?

YES: Replace the rear combination light socket (LH). Check that the tail light (LH) illuminates normally.

NO: Repair the wiring harness. Check that the tail light (LH) illuminates normally.







STEP 12. Check rear combination light (LH) connector F-12 and front-ECU connector A-10X for damage.

Q: Are rear combination light (LH) connector F-12 and front-ECU connector A-10X in good condition?

YES: Go to Step 13.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the tail light (LH) illuminates normally.










STEP 13. Check the wiring harness between rear combination light (LH) connector F-12 and front-ECU connector A-10X.

NOTE: Also check intermediate connectors C-66 and C-67. If intermediate connector C-66 or C-67 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between rear combination light (LH) connector F-12 and front-ECU connector A-10X in good condition?

YES: Replace the rear combination light socket (LH). Check that the tail light (LH) illuminates normally.

NO: Repair the wiring harness. Check that the tail light (LH) illuminates normally.

STEP 14. Check the stop/tail light bulb (RH).
1. Remove the stop/tail light bulb (RH).
2. Check that the stop/tail light bulb (RH) is not broken.

Q: Is the stop/tail light bulb (RH) in good condition?

YES: Go to Step 15.

NO: Replace the stop/tail light bulb (RH). Check that the tail light (RH) illuminates normally.




STEP 15. Measure at rear combination light (RH) connector F-10 in order to check the ground circuit to the rear combination light (RH).
1. Disconnect rear light (RH) connector F-10, and measure at the wiring harness side.
2. Measure the resistance value between terminal 5 and ground.
- The measured value should be 2 ohm or less.

Q: Does the measured resistance value correspond with this range?

YES: Go to Step 18.

NO: Go to Step 16.




STEP 16. Check rear combination light (RH) connector F-10 for damage.

Q: Is rear combination light (RH) connector F-10 in good condition?

YES: Go to Step 17.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the tail light (RH) illuminates normally.




STEP 17. Check the wiring harness between rear combination light (RH) connector F-10 and ground.

Q: Is the wiring harness between rear combination light (RH) connector F-10 and ground in good condition?

YES: Replace the rear combination light socket (RH). Check that the tail light (RH) illuminates normally.

NO: Repair the wiring harness. Check that the tail light (RH) illuminates normally.







STEP 18. Check rear combination light (RH) connector F-10 and front-ECU connector A-10X for damage.

Q: Are rear combination light (RH) connector F-10 and front-ECU connector A-10X in good condition?

YES: Go to Step 19.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the tail light (RH) illuminates normally.













STEP 19. Check the wiring harness between rear combination light (RH) connector F-10 and front-ECU connector A-10X.

NOTE: Also check intermediate connectors C-66 and C-71. If intermediate connector C-66 or C-71 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between rear combination light (RH) connector F-10 and front-ECU connector A-10X in good condition?

YES: Replace the rear combination light socket (RH). Check that the tail light (RH) illuminates normally.

NO: Repair the wiring harness. Check that the tail light (RH) illuminates normally.

STEP 20. Check the position light bulb (LH).
1. Remove the position light bulb (LH).
2. Check that the position light bulb (LH) is not broken.

Q: Is the position light bulb (LH) in good condition?

YES: Go to Step 21.

NO: Replace the position light bulb (LH). Check that the position light (LH) illuminates normally.




STEP 21. Measure at front combination light (LH) connector A-26 in order to check the ground circuit to the position light (LH).
1. Disconnect front combination light (LH) connector A-26, and measure at the wiring harness side.
2. Measure the resistance value between terminal 2 and ground.
- The measured value should be 2 ohm or less.

Q: Does the measured resistance value correspond with this range?

YES: Go to Step 25.

NO: Go to Step 22.




STEP 22. Check front combination light (LH) connector A-26 for damage.

Q: Is front combination light (LH) connector A-26 in good condition?

YES: Go to Step 23.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the position light (LH) illuminates normally.




STEP 23. Check the wiring harness between front combination light (LH) connector A-26 and ground.

Q: Is the wiring harness between front combination light (LH) connector A-26 and ground in good condition?

YES: Replace the front combination light socket (LH). Check that the position light (LH) illuminates normally.

NO: Repair the wiring harness. Check that the position light (LH) illuminates normally.







STEP 24. Check front combination light (LH) connector A-26 and front-ECU connector A-10X for damage.

Q: Are front combination light (LH) connector A-26 and front-ECU connector A-10X in good condition?

YES: Go to Step 25.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the position light (LH) illuminates normally.







STEP 25. Check the wiring harness between front combination light (LH) connector A-26 and front-ECU connector A-10X.

Q: Is the wiring harness between front combination light (LH) connector A-26 and front-ECU connector A-10X in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. Check that the position light (LH) illuminates normally.

STEP 26. Check the position light bulb (RH).
1. Remove the position light bulb (RH).
2. Check that the position light bulb (RH) is not broken.

Q: Is the position light bulb (RH) in good condition?

YES: Go to Step 27.

NO: Replace the position light bulb (RH). Check that the position light (RH) illuminates normally.




STEP 27. Measure at front combination light (RH) connector A-35 in order to check the ground circuit to the position light (RH).
1. Disconnect front combination light (RH) connector A-35, and measure at the wiring harness side.
2. Measure the resistance value between terminal 2 and ground.
- The measured value should be 2 ohm or less.

Q: Does the measured resistance value correspond with this range?

YES: Go to Step 30.

NO: Go to Step 28.




STEP 28. Check front combination light (RH) connector A-35 for damage.

Q: Is front combination light (RH) connector A-35 in good condition?

YES: Go to Step 29.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the position light (RH) illuminates normally.




STEP 29. Check the wiring harness between front combination light (RH) connector A-35 and ground.

Q: Is the wiring harness between front combination light (RH) connector A-35 and ground in good condition?

YES: Replace the front combination light socket (RH). Check that the position light (RH) illuminates normally.

NO: Repair the wiring harness. Check that the position light (RH) illuminates normally.







STEP 30. Check front combination light (RH) connector A-35 and front-ECU connector A-10X for damage.

Q: Are front combination light (RH) connector A-35 and front-ECU connector A-10X in good condition?

YES: Go to Step 31.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the position light (RH) illuminates normally.













STEP 31. Check the wiring harness between front combination light (RH) connector A-35 and front-ECU connector A-10X.

NOTE: Also check intermediate connectors C-12 and C-66. If intermediate connector C-12 or C-66 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between front combination light (RH) connector A-35 and front-ECU connector A-10X in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. Check that the position light (RH) illuminates normally.

STEP 32. Check the license plate light bulb.
1. Remove the license plate light bulb.
2. Check that the license plate light bulb is not broken.

Q: Is the license plate light bulb in good condition?

YES: Go to Step 33.

NO: Replace the license plate light bulb. Check that the license plate lights illuminate normally.




STEP 33. Measure at license plate light connector F-19 in order to check the ground circuit to the license plate lights.
1. Disconnect license plate light connector F-19, and measure at the wiring harness side.
2. Measure the resistance value between terminal 1 and ground.
- The measured value should be 2 ohm or less.

Q: Does the measured resistance value correspond with this range?

YES: Go to Step 36.

NO: Go to Step 34.




STEP 34. Check license plate light connector F-19 for damage.

Q: Is license plate light connector F-19 in good condition?

YES: Go to Step 35.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the license plate lights illuminate normally.




STEP 35. Check the wiring harness between license plate light connector F-19 and ground.

Q: Is the wiring harness between license plate light connector F-19 and ground in good condition ?

YES: Replace the license plate light socket. Check that the license plate lights illuminate normally.

NO: Repair the wiring harness. Check that the license plate lights illuminate normally.







STEP 36. Check license plate light connector F-19 and front-ECU connector A-10X for damage.

Q: Are license plate light connector F-19 and front-ECU connector A-10X in good condition?

YES: Go to Step 37.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the license plate lights illuminate normally.










STEP 37. Check the wiring harness between license plate light connector F-19 and front-ECU connector A-10X.

NOTE: Also check intermediate connectors C-66 and C-67. If intermediate connector C-66 or C-67 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between license plate light connector F-19 and front-ECU connector A-10X in good condition?

YES: Replace the license plate light socket. Check that the license plate lights illuminate normally.

NO: Repair the wiring harness. Check that the license plate lights illuminate normally.