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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 103 (Totally Integrated Power Module (TIPM) - Electrical Diagnostics - 3500 Cab & Chassis, 4500 & 5500) >> Diagnosis and Testing >> B1660-Front Fog Lamp Control Circuit High >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. INTERMITTENT CONDITION 
    1. Turn the ignition on.
    2. With the scan tool, clear all TIPM DTCs.
    3. Turn the Front Fog Lamps on.
    4. With the scan tool read the DTC information.

      Does the scan tool read: B1660-FRONT FOG LAMP CONTROL CIRCUIT HIGH?

      Yes 

      • Go To  2.

      No 

      • The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST  .
  2. LEFT AND RIGHT FRONT FOG LAMP BULBS 
    1. Turn the ignition off.
    2. Inspect the Left and Right Front Fog Lamp Bulb Assemblies.

      Are the inoperative bulbs OK?

      Yes 

      • Go To  3.

      No 

      • Replace the Inoperative bulb(s) in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST  .
  3. (L89) FRONT FOG LAMP CONTROL CIRCUIT OPEN 
    Fig 1: Checking Front Fog Lamp Control Output Circuit
    GC0091072Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the TIPM C3 harness connector.
    3. Disconnect the Left Front Fog Lamp harness connector.
    4. Measure the resistance of the (L89) Front Fog Lamp Control Output circuit.

      Is the resistance above 5.0 Ohms?

      Yes 

      • Repair the (L89) Left Front Fog Lamp Control circuit for an open condition.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST  .

      No 

      • Go To  4.
  4. (L90) RIGHT FRONT FOG LAMP CONTROL CIRCUIT OPEN 
    Fig 2: Measuring Resistance Of Right Front Fog Lamp Control Output Circuit
    GC0091073Courtesy of CHRYSLER LLC
    1. Disconnect the Right Front Fog Lamp harness connector.
    2. Measure the resistance of the (L90) Right Front Fog Lamp Control Output circuit.

      Is the resistance above 5.0 Ohms

      Yes 

      • Repair the (L90) Right Front Fog Lamp Control circuit for an open condition.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST  .

      No 

      • Go To  5.
  5. (L89) LEFT FRONT FOG LAMP CONTROL OUTPUT CIRCUIT SHORTED TO VOLTAGE 
    Fig 3: Measuring Voltage On Front Fog Lamp Control Output Circuit
    GC0091074Courtesy of CHRYSLER LLC
    1. Turn the ignition on.
    2. Measure for voltage on the (L89) Front Fog Lamp Control Output circuit.

      Is the voltage above 10.0 volts?

      Yes 

      • Repair the (L89) Front Fog Lamp Control Output circuit for a short to voltage condition.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST  .

      No 

      • Go To  6.
  6. (L90) RIGHT FRONT FOG LAMP CONTROL OUTPUT CIRCUIT SHORTED TO VOLTAGE 
    Fig 4: Measuring Voltage On Right Front Fog Lamp Control Output Circuit
    GC0091075Courtesy of CHRYSLER LLC
    1. Measure for voltage on the (L90) Right Front Fog Lamp Control Output circuit.

      Is the voltage above 10.0 volts?

      Yes 

      • Repair the (L90) Right Front Fog Lamp Control Output circuit for a short to voltage condition.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST  .

      No 

      • Replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST  .
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