Fog Lamps. Diagnosis and Testing

DTC Chart: BCM

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).

DTC Chart

Trouble Code	Description	Action
B1046:11	Front Fog Lamp Control Switch: Short to Ground	GO to Pinpoint Test C
B1147:11	Left front fog lamps: short to ground	GO to Pinpoint Test B
B1147:15	Left front fog lamps: short to battery or open	If the lamp does not operate, GO to Pinpoint Test B. If the lamp is always on, GO to Pinpoint Test C.
B1148:11	Right front fog lamps: short to ground	GO to Pinpoint Test B
B1148:15	Right front fog lamps: short to battery or open	If the lamp does not operate, GO to Pinpoint Test B. If the lamp is always on, GO to Pinpoint Test C.
U1000:00	Solid State Driver Protection Active - Driver Disabled: No Subtype Information	The module has temporarily disabled the output due to excessive current draw (for example, a short to ground). The BCM cannot turn the output on until the cause of the short circuit is corrected. FIRST, REFER to all other diagnostic trouble codes (DTCs). After the cause is corrected, CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. For more information on BCM FET protection, see REFER TO: Multifunction Electronic Modules - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).
U3000:49	Control Module: Internal Electronic Failure	The module has permanently disabled the output due to excessive current draw (for example, a short to ground) that exceeded the limits the BCM can withstand. The cause of the excessive current draw MUST be corrected before installing a new BCM. FIRST, REFER to all other diagnostic trouble codes (DTCs). After the cause is corrected, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint Test. . For more information on BCM FET protection, see REFER TO: Multifunction Electronic Modules - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

Symptom Chart

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).

Symptom Chart

Condition	Possible Sources	Action
Module Does Not Respond to Scan Tool	Fuse Wiring, Terminals or Connectors Module	REFER TO: Communication Network (418-00 Module Communications Network).
Both Front Fog Lamps Inoperative	Refer to Pinpoint Test	GO to Pinpoint Test A
Individual Front Fog Lamp Inoperative	Refer to Pinpoint Test	GO to Pinpoint Test B
One or both front fog lamps are always on	Refer to Pinpoint Test	GO to Pinpoint Test C

Pinpoint Tests

Both Front Fog Lamps Inoperative

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

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 Preliminary Diagnosis

• Inspect the headlamp switch for damage.

PINPOINT TEST A: BOTH FRONT FOG LAMPS DO NOT OPERATE

A1 CHECK THE HEADLAMP SWITCH

Ignition OFF. Disconnect: Headlamp Switch C205. Perform the headlamp switch component test. REFER TO Wiring Diagrams Cell 149 for schematic and connector information. Does the headlamp switch pass the component test? Yes GO to A2 No INSTALL a new headlamp switch. REFER to: Headlamp Switch (417-01 Exterior Lighting, Removal and Installation).

A2 CHECK THE FOG LAMP SWITCH CIRCUIT FOR AN OPEN

Disconnect: BCM C2280G. Action: Click to display the connectors Positive lead Measurement/Action Negative lead C205-14 C2280G-20 Is the resistance less than 3 ohms? Yes GO to A3 No REPAIR the circuit.

A3 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. 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.

Individual front fog lamp does not work

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

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 Conditions
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.
B1147:15	Left front fog lamps: short to battery or open	Continuous memory and on-demand DTC that sets when the BCM detects an open or a short to battery voltage in the left fog lamp output circuit.
B1148:11	Right front fog lamps: short to ground	Continuous memory and on-demand DTC that sets when the BCM detects a short to ground in the right fog lamp output circuit.
B1148:15	Right front fog lamps: short to battery or open	Continuous memory and on-demand DTC that sets when the BCM detects an open or a short to battery voltage in the right fog lamp output circuit.
U1000:00	Solid State Driver Protection Active - Driver Disabled: No Subtype Information	This DTC sets when the BCM has temporarily disabled an output driver. The module has temporarily disabled the output due to excessive current draw (for example, a short to ground). The BCM cannot turn the output on until the cause of the short circuit is removed, the diagnostic trouble codes (DTCs) have been cleared, and a self-test is initiated. For more information on BCM field effect transistor (FET) protection, refer to Refer to: Module-Controlled Features - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).
U3000:49	Control Module: Internal Electronic Failure	This DTC sets when the BCM has permanently disabled an output driver. The module has permanently disabled the output due to excessive current draw (for example, a short to ground) exceeding the limits the BCM can withstand. REPAIR the cause of the excessive current draw before installing a new BCM. For more information on BCM field effect transistor (FET) protection, refer to Refer to: Module-Controlled Features - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

Possible Sources

• Lamp
• Wiring, Terminals or Connectors
• BCM

Visual Inspection and Preliminary Diagnosis

• Inspect the fog lamp bulb and make sure it is in good condition.

DIAGNOSTIC TEST B: INDIVIDUAL FRONT FOG LAMP INOPERATIVE

B1 CHECK THE VOLTAGE AT THE INOPERATIVE FOG LAMP

Ignition OFF. Disconnect: Left fog lamp C152 or right fog lamp C162. The ignition is on. Set the headlamp switch to the HEADLAMPS position and turn on the fog lamp switch. Action: Click to display the connectors Left fog lamp Positive lead Measurement/Action Negative lead C152-1 Ground Click to display the connectors Right fog lamp Positive lead Measurement/Action Negative lead C162-1 Ground Is the voltage greater than 11 volts? Yes GO to B3 No GO to B2

B2 REPEAT THE ON-DEMAND SELF-TEST AND CHECK THE VOLTAGE AT THE NON-OPERATING FOG LAMP

Turn the headlamp switch to the OFF position. 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 the HEADLAMPS position and turn on the fog lamp switch. Action: Click to display the connectors Left fog lamp Positive lead Measurement/Action Negative lead C152-1 Ground Click to display the connectors Right fog lamp Positive lead Measurement/Action Negative lead C162-1 Ground Is the voltage greater than 11 volts? Yes INSTALL a new fog lamp bulb. No GO to B4

B3 CHECK THE FOG LAMP GROUND CIRCUIT FOR AN OPEN

Action: Click to display the connectors Left fog lamp Positive lead Measurement/Action Negative lead C152-1 C152-2 Click to display the connectors Right fog lamp Positive lead Measurement/Action Negative lead C162-1 C162-2 Is the voltage greater than 11 volts? Yes INSTALL a new fog lamp bulb. No REPAIR the circuit.

B4 CHECK THE FOG LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND

Turn the headlamp switch to the OFF position. Ignition OFF. Disconnect: BCM C2280B. Action: Click to display the connectors Left fog lamp Positive lead Measurement/Action Negative lead C152-1 Ground Click to display the connectors Right fog lamp Positive lead Measurement/Action Negative lead C162-1 Ground Is the resistance greater than 10000 Ohms? Yes GO to B5 No REPAIR the circuit. After the repair: If no diagnostic trouble codes (DTCs) are present, CHECK the system for normal operation. If any BCM diagnostic trouble codes (DTCs) other than DTC U3000:49 are present, CLEAR the diagnostic trouble codes (DTCs), REPEAT the self-test (required to enable the lamp output driver) and cycle the ignition OFF and ON. CHECK the system for normal operation. If DTC U3000:49 is present, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.

B5 CHECK THE FOG LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Action: Click to display the connectors Left fog lamp Positive lead Measurement/Action Negative lead C152-1 C2280B-12 Click to display the connectors Right fog lamp Positive lead Measurement/Action Negative lead C162-1 C2280B-5 Is the resistance less than 3 ohms? Yes GO to B6 No REPAIR the circuit.

B6 CHECK THE BCM (BODY CONTROL MODULE) FOR PROPER 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. 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.

One or both front fog lamps are always on

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

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 Conditions
B1046:11	Front Fog Lamp Control Switch: Short to Ground	Continuous memory and on-demand DTC that sets when the BCM detects a short to ground in the fog lamp input circuit.
B1147:15	Left front fog lamps: short to battery or open	Continuous memory and on-demand DTC that sets when the BCM detects an open or a short to battery voltage in the left fog lamp output circuit.
B1148:15	Right front fog lamps: short to battery or open	Continuous memory and on-demand DTC that sets when the BCM detects an open or a short to battery voltage in the right fog lamp output circuit.

Possible Sources

• Wiring, Terminals or Connectors
• Headlight Switch
• BCM

Visual Inspection and Preliminary Diagnosis

• Inspect the headlamp switch for damage.

PINPOINT TEST C: ONE OR BOTH FRONT FOG LAMPS ARE ALWAYS ON

C1 CHECK THE FOG LAMP OPERATION

The ignition is on. Turn the headlamp switch to the OFF position. Observe the operation of the left and right fog lamps. Do both fog lamps illuminate? Yes GO to C2 No GO TO C4

C2 CHECK THE LAMP SWITCH

Ignition OFF. Disconnect: Headlamp Switch C205. Perform the headlamp switch component test. REFER TO Wiring Diagrams Cell 149 for schematic and connector information. Does the headlamp switch pass the component test? Yes GO to C3 No INSTALL a new headlamp switch. REFER to: Headlamp Switch (417-01 Exterior Lighting, Removal and Installation).

C3 CHECK THE FOG LAMP SWITCH CIRCUIT FOR A SHORT TO GROUND

Disconnect: BCM C2280G. Action: Click to display the connectors Positive lead Measurement/Action Negative lead C205-14 Ground Is the resistance greater than 10000 Ohms? Yes GO to C5 No REPAIR the circuit.

C4 CHECK THE FOG LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO BATTERY VOLTAGE

Ignition OFF. Disconnect: BCM C2280B. The ignition is on. Does one of the fog lamps remain illuminated? Yes REPAIR the faulty circuit. No GO to C5

C5 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern, Click here to access the guided procedure (BCM). Internet Explorer version 11 or later is required to perform this Pinpoint test. 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.