Ford Escape Quiz
Electrical

Diagnosis and Testing - Fog Lamps

In this manual: Electrical
General Information — 26Chassis — 160Powertrain — 323Electrical — 356Body and Paint — 290
~15min read

Diagnostic Trouble Code (DTC) Chart

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).


Diagnostic Trouble Code Chart


Module Trouble Code Description Action
BCM B1147:11 Left front fog lamps: short to ground GO to Pinpoint Test B
BCM B1147:15 Left front fog lamps: short to battery or open GO to Pinpoint Test B
BCM B1148:11 Right front fog lamps: short to ground GO to Pinpoint Test B
BCM B1148:15 Right front fog lamps: short to battery or open GO to Pinpoint Test B
BCM B1499:11 Exterior lamps power supply "A": short to ground GO to Pinpoint Test B
BCM B1499:15 Exterior lamps power supply "A": short to battery or open GO to Pinpoint Test B
BCM B149D: 11 Exterior lamps power supply "B": short to ground GO to Pinpoint Test B
BCM B149D: 15 Exterior lamps power supply "B": short to battery or open GO to Pinpoint Test B
BCM B1A79:11 Rear fog lamp: short to ground GO to Pinpoint Test C
BCM B1A79:15 Rear fog lamp: short to battery or open GO to Pinpoint Test C

Global Customer Symptom Codes (GCSC) Table

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).


Symptom Action
Lighting/Glass/Vision > Exterior Lighting > Fog/Auxiliary > Inoperative GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > Fog/Auxiliary > Inoperative GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > Fog/Auxiliary > Inoperative GO to Pinpoint Test C
Lighting/Glass/Vision > Exterior Lighting > Fog/Auxiliary > Remains On GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > Fog/Auxiliary > Remains On GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > Fog/Auxiliary > Remains On GO to Pinpoint Test C

Symptom Charts

Symptom Chart: Fog Lamps

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).

Condition Action
Module Does Not Respond to Diagnostic Scan Tool
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
Both front fog lamps inoperative or always on GO to Pinpoint Test A
Individual front fog lamp inoperative or always on GO to Pinpoint Test B
Rear fog lamp inoperative or always on GO to Pinpoint Test C

Pinpoint Tests


DIAGNOSTIC CHART A: BOTH FRONT FOG LAMPS INOPERATIVE OR ALWAYS ON

For circuits and connector information, refer to Wiring Diagrams, Cell 86.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER TO: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

Possible Sources

  • Wiring, Terminals or Connectors
  • Headlight Switch
  • BCM

Visual Inspection and Pre-checks

  • Inspect the headlamp switch for damage.
A1 CHECK THE HEADLAMP SWITCH
  • The ignition is on.
  • Using a scan tool, perform the BCM self-test.

Are there any BCM headlamp switch module diagnostic trouble codes (DTCs)?
Yes
REFER TO: Headlamps (417-01 Exterior Lighting, Diagnosis and Testing).
No INSTALL a new headlamp switch.
REFER TO: Headlamp Switch (417-01 Exterior Lighting, Removal and Installation).
CHECK the system for normal operation. If the condition returns, GO to A2.
A2 CHECK THE BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect the BCM and all related inline connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the BCM and all related inline connectors. Make sure they are installed and fully seated.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this condition, STOP this test and FOLLOW the service article instructions. If no service article resolves this condition, INSTALL a new BCM.
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
DIAGNOSTIC CHART B: INDIVIDUAL FRONT FOG LAMP INOPERATIVE OR ALWAYS ON

For circuits and connector information, refer to Wiring Diagrams, Cell 86.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER TO: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
BCM B1147:11 Left front fog lamps: short to ground Continuous memory and on-demand DTC that sets when the BCM detects a short to ground in the left fog lamp output circuit.
BCM B1147:15 Left front fog lamps: short to battery or open Continuous memory and on-demand DTC that sets when the BCM detects a short to voltage or an open in the left fog lamp output circuit.
BCM B1148:11 Right front fog lamps: short to ground Continuous memory and on-demand DTC set when the BCM detects a short to ground in the right fog lamp output circuit.
BCM B1148:15 Right front fog lamps: short to battery or open Continuous memory and on-demand DTC set when the BCM detects a short to voltage or an open in the right fog lamp output circuit.
BCM B1499:11 Exterior lamps power supply "A": short to ground Continuous memory and on-demand DTC that sets when the BCM detects a short to ground in the left fog lamp output circuit.
BCM B1499:15 Exterior Lamp Power Supply "A": Short to Battery or Open Continuous memory and on-demand DTC that sets when the BCM detects a short to voltage or an open in the left fog lamp output circuit.
BCM B149D:11 Exterior Lamp Power Supply "B": Short to Ground Continuous memory and on-demand DTC set when the BCM detects a short to ground in the right fog lamp output circuit.
BCM B149D:15 Exterior Lamp Power Supply "B": Short to Battery or Open Continuous memory and on-demand DTC set when the BCM detects a short to voltage or an open in the right fog lamp output circuit.

Possible Sources

  • Fog Lamp Assembly
  • Wiring, Terminals or Connectors
  • BCM

Visual Inspection and Pre-checks

  • Inspect the fog lamp assembly for damage.
B1 CHECK THE FRONT FOG LAMP OPERATION
  • The ignition is on.
  • Set the headlamp switch to PARKING LAMPS and turn on the front fog lamp switch.
  • Disconnect the front fog lamp switch and set the headlamp switch to OFF.

Does the individual fog lamp stay on?
Yes GO to B2
No GO to B3
B2 CHECK THE FOG LAMP VOLTAGE SUPPLY CIRCUITS FOR A SHORT TO VOLTAGE
  • Turn the headlamp switch to the OFF position.
  • Ignition OFF.
  • Disconnect the C2280E connector.
  • The ignition is on.

Does the suspect fog lamp stay on?
Yes REPAIR the faulty circuit.
No REPAIR the circuits.
B3 CHECK THE VOLTAGE AT THE NON-OPERATING FOG LAMP
  • Turn the headlamp switch to the OFF position.
  • Ignition OFF.
  • Disconnect the Halogen fog lamps, non-operating left fog lamp C152 or right fog lamp C162.
  • Disconnect the LED fog lamps, non-operating left fog lamp C1322 or right fog lamp C1323.
  • The ignition is on.
  • Set the headlamp switch to PARKING LAMPS and turn on the front fog lamp switch.
  • For halogen fog lamps, measure:
    Click to display connectors

    Left Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C152-1 Ground

    Click to display the connectors

    Right Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C162-1 Ground
  • For LED fog lamps, measure:
    Click to display connectors

    Left Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C1322-1 Ground

    Click to display the connectors

    Right Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C1323-1 Ground

Is the voltage greater than 11 volts?
Yes GO to B5
No GO to B4
B4 REPEAT ON-DEMAND SELF-TEST AND CHECK THE VOLTAGE AT THE FOG LAMP
  • Disconnect the front fog lamp switch and set the headlamp switch to OFF.
  • Using a scan tool, perform the BCM self-test.
  • Clear the diagnostic trouble codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • The ignition is on.
  • Set the headlamp switch to PARKING LAMPS and turn on the front fog lamp switch.
  • For halogen fog lamps, measure:
    Click to display connectors

    Left Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C152-1 Ground

    Click to display the connectors

    Right Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C162-1 Ground
  • For LED fog lamps, measure:
    Click to display connectors

    Left Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C1322-1 Ground

    Click to display the connectors

    Right Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C1323-1 Ground

Is the voltage greater than 11 volts?
Yes For halogen fog lamps, INSTALL a new front fog lamp bulb.
REFER TO: Front Fog Lamp (417-01 Exterior Lighting, Removal and Installation). For LED fog lamps, INSTALL a new front fog lamp.
REFER TO: Front Fog Lamp (417-01 Exterior Lighting, Removal and Installation).
No GO to B6
B5 CHECK THE NON-OPERATING FOG LAMP GROUND CIRCUIT FOR AN OPEN
  • For halogen fog lamps, measure:
    Click to display connectors

    Left Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C152-1 C152-2

    Click to display the connectors

    Right Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C162-1 C162-2
  • For LED fog lamps, measure:
    Click to display connectors

    Left Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C1322-1 C1322-2

    Click to display the connectors

    Right Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C1323-1 C1323-2

Is the voltage greater than 11 volts?
Yes For halogen fog lamps, INSTALL a new front fog lamp bulb.
REFER TO: Front Fog Lamp (417-01 Exterior Lighting, Removal and Installation). For LED fog lamps, INSTALL a new front fog lamp.
REFER TO: Front Fog Lamp (417-01 Exterior Lighting, Removal and Installation).
No REPAIR the circuit.
B6 CHECK THE FOG LAMP VOLTAGE SUPPLY CIRCUITS FOR A SHORT TO GROUND
  • Turn the headlamp switch to the OFF position.
  • Ignition OFF.
  • Disconnect the C2280E connector.
  • For halogen fog lamps, measure:
    Click to display connectors

    Left Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C152-1 Ground

    Click to display the connectors

    Right Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C162-1 Ground
  • For LED fog lamps, measure:
    Click to display connectors

    Left Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C1322-1 Ground

    Click to display the connectors

    Right Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C1323-1 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to B7
No REPAIR the circuit. After the repair:
If no diagnostic trouble codes (DTCs) are present, CHECK the system for normal operation.
If DTC U1000:00 is present, CLEAR the diagnostic trouble codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM.
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
B7 CHECK THE FOG LAMP VOLTAGE SUPPLY CIRCUITS FOR AN OPEN
  • For halogen fog lamps, measure:
    Click to display connectors

    Left Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C152-1 C2280E-6

    Click to display the connectors

    Right Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C162-1 C2280E-7
  • For LED fog lamps, measure:
    Click to display connectors

    Left Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C1322-1 C2280E-6

    Click to display the connectors

    Right Front Fog Lamp


    Positive lead Measurement/Action Negative lead
    C1323-1 C2280E-7

Is the resistance less than 3 ohms?
Yes GO to B8
No REPAIR the circuit.
B8 CHECK THE BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect the BCM and all related inline connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the BCM and all related inline connectors. Make sure they are installed and fully seated.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this condition, STOP this test and FOLLOW the service article instructions. If no service article resolves this condition, INSTALL a new BCM.
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
DIAGNOSTIC CHART C: REAR FOG LAMP INOPERATIVE OR ALWAYS ON

For circuits and connector information, refer to Wiring Diagrams, Cell 86.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER TO: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
BCM B1A79:11 Rear fog lamp: short to ground Continuous memory and on-demand DTC set when the BCM detects a short to ground in the rear fog lamp output circuit.
BCM B1A79:15 Rear fog lamp: short to battery or open Continuous memory and on-demand DTC set when the BCM detects a fault. open or short to voltage in the rear fog lamp output circuit.

Possible Sources

  • Rear Fog Lamp Bulb
  • Wiring, Terminals or Connectors
  • Headlight Switch
  • BCM

Visual Inspection and Pre-checks

  • Inspect the rear fog lamp for damage.
  • Inspect the headlamp switch for damage.
C1 CHECK THE HEADLAMP SWITCH
  • The ignition is on.
  • Using a scan tool, perform the BCM self-test.

Are there any BCM headlamp switch diagnostic trouble codes (DTCs)?
Yes
REFER TO: Headlamps (417-01 Exterior Lighting, Diagnosis and Testing).
No If the rear fog lamp does not operate, GO to C3.
If the rear fog lamp is always on, GO to C2.
C2 CHECK THE FOG LAMP VOLTAGE SUPPLY CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect: BCM C2280F.
  • The ignition is on.

Does the rear fog lamp remain on?
Yes REPAIR the circuit.
No GO TO C8
C3 CHECK THE VOLTAGE AT THE REAR FOG LAMP
  • Disconnect: Rear Fog Lamp C436.
  • The ignition is on.
  • Set the headlamp switch to PARKING LAMPS and turn on the rear fog lamp switch.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C436-2 Ground

Is the voltage greater than 11 volts?
Yes GO to C5
No GO TO C4
C4 REPEAT ON-DEMAND SELF-TEST AND CHECK THE VOLTAGE AT THE REAR FOG LAMP
  • Using a scan tool, perform the BCM self-test.
  • Clear the diagnostic trouble codes (DTCs) and repeat the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C436-2 Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new rear fog lamp bulb.
No GO to C6
C5 CHECK THE FOG LAMP GROUND CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C436-2 C436-1

Is the voltage greater than 11 volts?
Yes INSTALL a new rear fog lamp bulb.
No REPAIR the circuit.
C6 CHECK THE FOG LAMP VOLTAGE SUPPLY CIRCUITS FOR A SHORT TO GROUND
  • Turn the headlamp switch to the OFF position.
  • Ignition OFF.
  • Disconnect: BCM C2280F.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C436-2 Ground

Is the resistance greater than 10000 Ohms?
Yes GO TO C7
No REPAIR the circuit. After the repair:
If no diagnostic trouble codes (DTCs) are present, CHECK the system for normal operation.
If DTC U1000:00 is present, CLEAR the diagnostic trouble codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM.
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
C7 CHECK THE FOG LAMP VOLTAGE SUPPLY CIRCUITS FOR AN OPEN
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C436-2 C2280F-67

Is the resistance less than 3 ohms?
Yes GO TO C8
No REPAIR the circuit.
C8 CHECK THE BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the BCM connectors. Make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this condition, STOP this test and FOLLOW the service article instructions. If no service article resolves this condition, INSTALL a new BCM.
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

Test yourself

A quick Ford Escape quiz: every answer comes with an explanation and a link to the manual page.