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Home >> Chrysler >> 2001 >> Sebring LX, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 40 (Simplified Wiring System (SWS) - Coupe) >> SWS Diagnosis >> Symptom Procedures >> INSPECTION PROCEDURE L-1: Fog Light: Fog lights do not illuminate when the fog light switch is turned on. >> Diagnosis

INSPECTION PROCEDURE L-1: Fog Light: Fog lights do not illuminate when the fog light switch is turned on.: Diagnosis

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools: 

  1. STEP 1. Verify the taillights and headlight operation. 

    Q: Do the taillights and headlights illuminate normally? 

    YES  : Go to Step 2 < when using scan tool MB991502 > or 3 < when using a voltmeter >.

    NO:  Solve the problem first. Refer to SYMPTOM CHART  .

  2. STEP 2. Check the input signal (by using scan tool MB991502). 

    Check the input signals from the fog light switch.

    CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
    1. Connect scan tool MB991502 to the data link connector.
    2. Check that the tone alarm of scan tool MB991502 sounds when the input signal enters.

    Q: Does the tone alarm of scan tool MB991502 sound when the input signal enters? 

    YES  : Go to  Step 4.

    NO:  Scan tool MB991502 does not sound when the fog light switch is turned from "OFF" to "ON": Refer to INSPECTION PROCEDURE O-5 "THE FOG LIGHT SWITCH SIGNAL IS NOT SENT TO THE ETACS-ECU ( )".

    Fig 1: Connecting Scan Tool MB991502 To Data Link Connector
    G04541192Courtesy of DAIMLERCHRYSLER CORPORATION
  3. STEP 3. Check the input signal (by using a voltmeter). 

    Check the input signals from the fog light switch.

    1. Use special tool MB991529 to connect a voltmeter between ground terminal 4 or 5 and ETACS-ECU terminal 9 of the data link connector.
    2. Check that the voltmeter indicator deflects once when the input signal enters.

    Q: Does the voltmeter indicator deflect? 

    YES  : Go to Step 4.

    NO:  The voltmeter needle does not fluctuate when the fog light switch is turned from "OFF" to "ON": Refer to INSPECTION PROCEDURE O-5 "THE FOG LIGHT SWITCH SIGNAL IS NOT SENT TO THE ETACS-ECU ( )".

    Fig 2: Connecting Voltmeter Between Ground Terminal 4 And 5
    G04541193Courtesy of DAIMLERCHRYSLER CORPORATION
  4. STEP 4. Check the fog light relay. 
    TESTER CONNECTION SPECIFIED CONDITION CHART

    BATTERY VOLTAGE TESTER CONNECTION SPECIFIED CONDITION
    Not applied 1 - 4 Open circuit
    • Connect terminal 2 to the positive battery terminal
    • Connect terminal 3 to the negative battery terminal
    		 1 - 4 Less than 2 ohms

    Q: Is the fog light relay in good condition? 

    YES  : Go to Step 5.

    NO:  Replace the fog light relay. The fog lights should illuminate normally.

    Fig 3: Identifying Fog Light Relay Connector A-04X
    G04541194Courtesy of DAIMLERCHRYSLER CORPORATION
    Fig 4: Checking Fog Light Relay Circuit
    G04541195Courtesy of DAIMLERCHRYSLER CORPORATION
  5. STEP 5. Check the power supply circuit to the fog light relay. Test at fog light relay connector A-04X. 
    1. Disconnect the fog light relay connector A-04X and measure the voltage available at the relay box side of the connector.
      Fig 5: Identifying Fog Light Relay Connector A-04X
      G04541196Courtesy of DAIMLERCHRYSLER CORPORATION
    2. Measure the resistance value between terminal 1 and ground, and also between terminal 2 and ground.
      • The voltage should equal approximately 12 volts (battery positive voltage).

    Q: Is the measured voltage approximately 12 volts (battery positive voltage)? 

    YES  : Go to  Step 8.

    NO:  Go to Step 6.

    Fig 6: Measuring Resistance Value Between Terminal 1 And Ground
    G04541197Courtesy of DAIMLERCHRYSLER CORPORATION
  6. STEP 6. Check the fog light relay connector A-04X for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is fog light relay connector A-04X in good condition? 

    YES  : Go to Step 7.

    NO:  Repair or replace the damaged component(s). Refer to , HARNESS CONNECTOR INSPECTION . The fog lights should illuminate normally.

    Fig 7: Locating Fog Light Relay Connector A-04X
    G04541198Courtesy of DAIMLERCHRYSLER CORPORATION
  7. STEP 7. Check the wiring harness between fog light relay connector A-04X (terminal 1 and 2) and battery. 

    Q: Is the wiring harness between fog light relay connector A-04X (terminal 1 and 2) and battery 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. The fog lights should illuminate normally.

    Fig 8: Locating Fog Light Relay Connector A-04X
    G04541199Courtesy of DAIMLERCHRYSLER CORPORATION
  8. STEP 8. Check the fog light relay connector A-04X and front-ECU connector A-10X for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are fog light relay connector A-04X and front-ECU connector A-10X in good condition? 

    YES  : Go to Step 9.

    NO:  Repair or replace the damaged component(s). Refer to , HARNESS CONNECTOR INSPECTION . The fog lights should illuminate normally.

    Fig 9: Locating Fog Light Relay A-04X And Front-ECU Connectors A-10X
    G04541200Courtesy of DAIMLERCHRYSLER CORPORATION
  9. STEP 9. Check the wiring harness between fog light relay connector A-04X (terminal 3) and front-ECU connector A-10X (terminal 1). 

    Q: Is the wiring harness between fog light relay connector A-04X (terminal 3) and front-ECU connector A-10X (terminal 1) in good condition? 

    YES  : Go to Step 10.

    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. The fog lights should illuminate normally.

    Fig 10: Identifying Fog Light Relay A-04X And Front-ECU Connectors A-10X
    G04541201Courtesy of DAIMLERCHRYSLER CORPORATION
  10. STEP 10. Check the fog light connectors A-27 and A-31 and combination meter connector C-101 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 11: Identifying Fog Light Connectors A-27
    G04541202Courtesy of DAIMLERCHRYSLER CORPORATION
    Fig 12: Identifying Fog Light Connectors A-31
    G04541203Courtesy of DAIMLERCHRYSLER CORPORATION
    Fig 13: Identifying Fog Light Connectors A-27
    G04541204Courtesy of DAIMLERCHRYSLER CORPORATION
    Fig 14: Identifying Fog Light Connectors A-31
    G04541205Courtesy of DAIMLERCHRYSLER CORPORATION

    Q: Are fog light connectors A-27 and A-31 and combination meter connector C-101 in good condition? 

    YES  : Go to Step 11.

    NO:  Repair or replace the damaged component(s). Refer to , HARNESS CONNECTOR INSPECTION . The fog lights should illuminate normally.

    Fig 15: Identifying Combination Meter Connector C-101
    G04541206Courtesy of DAIMLERCHRYSLER CORPORATION
  11. STEP 11. Check the wiring harness between fog light relay connector A-04X (terminal 4) and fog light connectors A-27 (terminal 2) and A-31 (terminal 2) and combination meter connector C-101 (terminal 2). 
    Fig 16: Identifying Fog Light Relay Connector A-04X
    G04541207Courtesy of DAIMLERCHRYSLER CORPORATION
    Fig 17: Identifying Fog Light Relay Connector A-27
    G04541208Courtesy of DAIMLERCHRYSLER CORPORATION
    Fig 18: Identifying Fog Light Relay Connector A-31
    G04541209Courtesy of DAIMLERCHRYSLER CORPORATION
    Fig 19: Identifying Fog Light Relay Connector A-27
    G04541210Courtesy of DAIMLERCHRYSLER CORPORATION
    Fig 20: Identifying Fog Light Relay Connector A-31
    G04541211Courtesy of DAIMLERCHRYSLER CORPORATION
    Fig 21: Identifying Combination Meter Connector C-101
    G04541212Courtesy of DAIMLERCHRYSLER CORPORATION
    NOTE: Also check intermediate connectors C-05 and C-209 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connectors C-05 or C-209 are damaged, repair or replace the damaged component(s) Refer to , HARNESS CONNECTOR INSPECTION .

    Q: Are the wiring harness between fog light relay connector A-04X (terminal 4) and fog light connectors A-27 (terminal 2) and A-31 (terminal 2) and combination meter connector C-101 (terminal 2) in good condition? 

    YES  : Go to Step 12.

    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. The fog lights should illuminate normally.

    Fig 22: Identifying Intermediate Connectors C-209
    G04541213Courtesy of DAIMLERCHRYSLER CORPORATION
  12. STEP 12. Replacement of ECU 
    1. Replace the front-ECU.
    2. The fog lights should illuminate normally.

    Q: Do the fog lights illuminate normally? 

    YES  : No action is necessary and testing is complete.

    NO:  Replace the ETACS-ECU. The fog light should illuminate normally.

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