Part 1 of 2
Flasher Timer: The right or left turn-signal light does not illuminate.Turn-Signal Lightd Circuit Part 1:
Turn-Signal Lightd Circuit Part 2:
TECHNICAL DESCRIPTION (COMMENT)
If the right or left turn-signal light does not illuminate, its bulb may be defective.
TROUBLESHOOTING HINTS
- The turn-signal light bulb may be defective.
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector.
DIAGNOSIS
Required Special Tool:
- MB991223: Harness Set
- MB992006: Extra Fine Probe
STEP 1. Check the hazard warning light.
Q: Which turn-signal light does not illuminate?
The front turn-signal light (LH) and the side turn-signal light (LH) : Go to Step 2.
The front turn-signal light (RH) and the turn-signal indicator light (RH): Go to Step 4.
The side turn-signal light (RH) and the rear turn-signal light (RH) : Go to Step 6.
The front turn-signal light
The front turn-signal light
The front turn-signal light
The front turn-signal light
The side turn-signal light (LH): Go to Step 28.
The side turn-signal light (RH): Go to Step 33.
The rear turn-signal light (LH): Go to Step 38.
The rear turn-signal light (RH): Go to Step 43.
The turn-signal indicator light (LH): Go to Step 48.
The turn-signal indicator light (RH): Go to Step 50.
The turn-signal indicator light (both right and left): Go to Step 52.
LH side only : Refer to Inspection Procedure K-1 "Turn-signal lights does not flash when the turn-signal light switch is turned on."
RH side only : Refer to Inspection Procedure K-1 "Turn-signal lights does not flash when the turn-signal light switch is turned on."
Both LH and RH sides : Refer to Inspection Procedure K-2 "Hazard warning lights do not flash when the hazard warning light switch is turned on."
STEP 2. Check junction block connector C-210 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is junction block connector C-210 in good condition?
YES: Go to Step 3.
NO: Repair or replace the damaged components). Refer to Harness Connector Inspection. Verify that the turn-signal lights illuminate normally.
STEP 3. Check the wiring harness between turn-signal light (LH) connector A-02 (terminal 2) and junction block connector C-210 (terminal 5).
NOTE: Also check intermediate connector C-129 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-129 is damaged, repair or replace the damaged components) as described in Harness Connector Inspection.
Q: Is the wiring harness between turn-signal light (LH) connector A-02 (terminal 2) and junction block connector C-210 (terminal 5) 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 turn-signal lights illuminate normally.
STEP 4. Check junction block connector C-214 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are junction block connector C-214 in good condition?
YES: Go to Step 5.
NO: Repair or replace the damaged components). Refer to Harness Connector Inspection. Verify that the turn-signal lights illuminate normally.
STEP 5. Check the wiring harness between combination meter connector C-02 (terminal 49) and junction block connector C-214 (terminal 27).
Q: Is the wiring harness between combination meter connector C-02 (terminal 49) and junction block connector C-214 (terminal 27) 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 turn-signal lights illuminate normally.
STEP 6. Check junction block connector C-210 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is junction block connector C-210 in good condition?
YES: Go to Step 7.
NO: Repair or replace the damaged components). Refer to Harness Connector Inspection. Verify that the turn-signal lights illuminate normally.
STEP 7. Check the wiring harness between intermediate connector C-111 (terminal 1) and junction block connector C-210 (terminal 7).
Q: Is the wiring harness between intermediate connector C-111 (terminal 1) and junction block connector C-210 (terminal 7) 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 turn-signal lights illuminate normally.
STEP 8. Check front combination light assembly (LH) connector A-41 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is the front turn-signal (LH) connector A-41 in good condition?
YES: Go to Step 9.
NO: Repair or replace the damaged components). Refer to Harness Connector Inspection. Verify that the turn-signal lights illuminate normally.
STEP 9. Check the front turn-signal light bulb (LH).
1. Remove the front turn-signal (LH) light bulb.
2. Verify that the front turn-signal light bulb (LH) is not damaged or burned out.
Q: Is the front turn-signal (LH) light bulb in good condition?
YES: Go to Step 10.
NO: Replace the front turn-signal (LH) light bulb. Verify that the turn-signal lights illuminate normally.
STEP 10. Check the ground circuit to the front turn-signal light (LH). Measure the resistance at front combination light assembly (LH) connector A-41.
1. Disconnect front combination light assembly (LH) connector A-41 and measure the resistance available at the wiring harness side of the connector.
2. Measure the resistance value between terminal 3 and ground.
- The resistance should equal 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES: Go to Step 12.
NO: Go to Step 11.
STEP 11. Check the wiring harness between front combination light assembly (LH) connector A-41 (terminal 3) and ground.
Q: Is the wiring harness between front combination light assembly (LH) connector A-41 (terminal 3) and ground in good condition?
YES: Replace the front combination light assembly (LH). Verify that the turn-signal lights illuminate normally.
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 turn-signal lights illuminate normally.
STEP 12. Check the wiring harness between front combination light assembly (LH) connector A-41 (terminal 1) and intermediate connector C-129 (terminal 20).
Q: Is the wiring harness between front combination light assembly (LH) connector A-41 (terminal 1) and intermediate connector C-129 (terminal 20) in good condition?
YES: Replace the front combination light assembly (LH). Verify that the turn-signal lights illuminate normally.
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 turn-signal lights illuminate normally.
STEP 13. Check front combination light assembly (RH) connector A-42 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is the front turn-signal (RH) connector A-42 in good condition?
YES: Go to Step 14.
NO: Repair or replace the damaged components). Refer to Harness Connector Inspection. Verify that the turn-signal lights illuminate normally.
STEP 14. Check the front turn-signal light bulb (RH).
1. Remove the front turn-signal (RH) light bulb.
2. Verify that the front turn-signal light bulb (RH) is not damaged or burned out.
Q: Is the front turn-signal (RH) light bulb in good condition?
YES: Go to Step 15.
NO: Replace the front turn-signal (RH) light bulb. Verify that the turn-signal lights illuminate normally.
STEP 15. Check the ground circuit to the front turn-signal light (RH). Measure the resistance at front combination light assembly (RH) connector A-42.
1. Disconnect front combination light assembly (RH) connector A-42 and measure the resistance available at the wiring harness side of the connector.
2. Measure the resistance value between terminal 3 and ground.
- The resistance should equal 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES: Go to Step 17.
NO: Go to Step 16.
STEP 16. Check the wiring harness between front combination light assembly (RH) connector A-42 (terminal 3) and ground.
Q: Is the wiring harness between front combination light assembly (RH) connector A-42 (terminal 3) and ground in good condition?
YES: Replace the front combination light assembly (RH). Verify that the turn-signal lights illuminate normally.
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 turn-signal lights illuminate normally.
STEP 17. Check the wiring harness between front combination light assembly (RH) connector A-42 (terminal 1) and junction block connector C-214 (terminal 27).
NOTE: Also check intermediate connector C-129 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-129 is damaged, repair or replace the damaged components) as described in Harness Connector Inspection.
Q: Is the wiring harness between front combination light assembly (RH) connector A-42 (terminal 1) and junction block connector C-214 (terminal 27) in good condition?
YES: Replace the front combination light assembly (RH). Verify that the turn-signal lights illuminate normally.
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 turn-signal lights illuminate normally.
STEP 18. Check front combination light assembly (LH) connector A-31 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is the front turn-signal (LH) connector A-31 in good condition?
YES: Go to Step 19.
NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. Verify that the turn-signal lights illuminate normally.
STEP 19. Check the front turn-signal light bulb (LH).
1. Remove the front turn-signal (LH) light bulb.
2. Verify that the front turn-signal light bulb (LH) is not damaged or burned out.
Q: Is the front turn-signal (LH) light bulb in good condition?
YES: Go to Step 20.
NO: Replace the front turn-signal (LH) light bulb. Verify that the turn-signal lights illuminate normally.
STEP 20. Check the ground circuit to the front turn-signal light (LH). Measure the resistance at front combination light assembly (LH) connector A-31.
1. Disconnect front combination light assembly (LH) connector A-31 and measure the resistance available at the wiring harness side of the connector.
2. Measure the resistance value between terminal 7 and ground.
- The resistance should equal 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES: Go to Step 22.
NO: Go to Step 21.
STEP 21. Check the wiring harness between front combination light assembly (LH) connector A-31 (terminal 7) and ground.
Q: Is the wiring harness between front combination light assembly (LH) connector A-31 (terminal 7) and ground in good condition?
YES: Replace the front combination light assembly (LH). Verify that the turn-signal lights illuminate normally.
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 turn-signal lights illuminate normally.
STEP 22. Check the wiring harness between front combination light assembly (LH) connector A-31 (terminal 2) and intermediate connector C-129 (terminal 20).
Q: Is the wiring harness between front combination light assembly (LH) connector A-31 (terminal 2) and intermediate connector C-129 (terminal 20) in good condition?
YES: Replace the front combination light assembly (LH). Verify that the turn-signal lights illuminate normally.
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 turn-signal lights illuminate normally.
STEP 23. Check front combination light assembly (RH) connector A-39 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is the front turn-signal (RH) connector A-39 in good condition?
YES: Go to Step 24.
NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. Verify that the turn-signal lights illuminate normally.
STEP 24. Check the front turn-signal light bulb (RH).
1. Remove the front turn-signal (RH) light bulb.
2. Verify that the front turn-signal light bulb (RH) is not damaged or burned out.
Q: Is the front turn-signal (RH) light bulb in good condition?
YES: Go to Step 25.
NO: Replace the front turn-signal (RH) light bulb. Verify that the turn-signal lights illuminate normally.
STEP 25. Check the ground circuit to the front turn-signal light (RH). Measure the resistance at front combination light assembly (RH) connector A-39.
1. Disconnect front combination light assembly (RH) connector A-39 and measure the resistance available at the wiring harness side of the connector.
2. Measure the resistance value between terminal 7 and ground.
- The resistance should equal 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES: Go to Step 27.
NO: Go to Step 26.