Inspection Procedure 2

Inspection Procedure 2: One Of The Fog Lights Does Not Illuminate.

Fog Light Circuit (Part 1):

Fog Light Circuit (Part-2):

TECHNICAL DESCRIPTION (COMMENT)
If one of the fog lights does not Illuminate, the wiring harness connector(s), the bulb may be defective.

TROUBLESHOOTING HINTS
- Burned-out fog light bulb
- Damaged harness wires and connectors

DIAGNOSIS

Required Special Tools:
- MB992006: Extra fine probe
- MB991223: Harness set

STEP 1. Check fog light (LH) connector A-43 or fog light (RH) A-54 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is fog light (LH) connector A-43 or fog light (RH) A-54 in good condition?

YES : Go to Step 2.

NO : Repair or replace the damaged component(s).

STEP 2. Check the fog light bulb.

1. Remove the fog light bulb.
2. Verify that the fog light bulb is not damaged or burned out.

Q: Is the fog light bulb in good condition?

YES : Go to Step 3.

NO : Replace the fog light bulb.

STEP 3. Check the ground circuit to the fog light (LH) or fog light (RH). Measure the resistance at fog light (LH) connector A-43 or fog light (RH) connector A-54.

1. Disconnect the connector, and measure at the wiring harness side.
2. Check the resistance between the fog light connector and ground.







- Resistance between A-43 fog light (LH) connector terminal No.1 and ground







- Resistance between A-54 front fog light (RH) connector terminal No.1 and ground

OK: The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 5.

NO : Go to Step 4.

STEP 4. Check the wiring harness between fog light (LH) connector A-43 (terminal 1) or fog light (RH) connector A-54 (terminal 1) and ground.

NOTE: Also check intermediate connector A-50 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector A-50 is damaged, repair or replace the connector.

- Check the ground wires for open circuit.

Q: Is the wiring harness between fog light (LH) connector A-43 (terminal 1) or fog light (RH) connector A-54 (terminal 1) and ground in good condition?

YES : The trouble can be an intermittent malfunction.

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.

STEP 5. Check fog light relay connector A-15X for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is fog light relay connector A-15X in good condition?

YES : Go to Step 6.

NO : Repair or replace the damaged component(s).

STEP 6. Check the wiring harness between fog light (LH) connector A-43 (terminal 2) or fog light (RH) connector A-54 (terminal 2) and fog light relay connector A-15X (terminal 3).

NOTE: Also check intermediate connector A-50 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector A-50 is damaged, repair or replace the connector.

- Check the power supply line for open circuit.

Q: Is the wiring harness between fog light (LH) connector A-43 (terminal 2) or fog light (RH) connector A-54 (terminal 2) and fog light relay connector A-15X (terminal 3) in good condition?

YES : Go to Step 7.

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.

STEP 7. Retest the system.

Q: Does the right or left fog light does not illuminate in good condition?

YES : The trouble can be an intermittent malfunction.

NO : Replace the fog light(s).