Ford Fiesta Quiz
Lighting

Headlamps. Diagnosis and Testing

In this manual: Lighting
Service Information — 27Suspension — 48Transmission — 9Brake System — 52Steering — 21Engine — 140Manual Transmission, Clutch, Transfer Case and Power Transfer Unit — 48Exhaust System — 6Fuel System — 21Climate Control System — 58Instrumentation and Warning Systems — 26Battery and Charging System — 20Infotainment Systems — 41Lighting — 29Power Distribution — 11Electronic Function Group — 30Body and Paint — 275Frame and Mounting — 3
~26min read

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
B1007:92 High Beam Headlamp Switch: Malfunction or Incorrect Operation GO to Pinpoint Test D
B109A:12 High Beam Relay: Short to Battery GO to Pinpoint Test B
B109A:14 High Beam Relay: Short to Ground or Open Circuit
  • If the high beam headlamps are inoperative, GO to Pinpoint Test B.
  • If the high beam headlamps are constantly on, GO to Pinpoint Test D.
B10A6:92 Main Light Switch: Performance or Incorrect Operation GO to Pinpoint Test C
B1D00:11 Left low beam: circuit short to ground GO to Pinpoint Test A
B1D00:15 Low Beam Left: Short to Battery or Open Circuit
  • If the low beam headlamps are inoperative, GO to Pinpoint Test A.
  • If the low beam headlamps are constantly on, GO to Pinpoint Test C.
B1D01:11 Low Beam Right: Short to Ground GO to Pinpoint Test A
B1D01:15 Low Beam Right: Short to Battery or Open Circuit
  • If the low beam headlamps are inoperative, GO to Pinpoint Test A.
  • If the low beam headlamps are constantly on, GO to Pinpoint Test C.
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) exceeding 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 correcting the cause of the concern, INSTALL a new BCM.
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
For more information on BCM field effect transistor (FET) protection, see
REFER to: Module-Controlled Functions - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

Symptom 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).

Symptom Chart: Headlamps

Symptom Chart


Condition Possible Sources Action
Module Does Not Respond to Diagnostic Scan Tool
  • Fuse
  • Wiring, Terminals or Connectors
  • Module
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
Headlamp delay-off function is inoperative. BCM CHECK the flash-to-pass function. If flash-to-pass is inoperative, GO to Pinpoint Test E. If flash-to-pass is operative, INSTALL a new BCM.
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
One or both low beam headlamps inoperative Refer to Pinpoint Test CHECK that the bulb(s) are OK. If OK, GO to Pinpoint Test A.
One or both high beam headlamps inoperative Refer to Pinpoint Test CHECK that the bulb(s) are OK. If OK, GO to Pinpoint Test B.
Low beam headlamps constantly on Refer to Pinpoint Test GO to Pinpoint Test C
High beam headlamps constantly on Refer to Pinpoint Test GO to Pinpoint Test D
Flash-to-pass function inoperative Refer to Pinpoint Test GO to Pinpoint Test E

Pinpoint Tests

One or both low beam headlamps inoperative


Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms


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
B1D00:11 Low Beam Left: Short to Ground Continuous on-demand DTC that is set when the BCM detects a short to ground in the left low beam output circuit.
B1D00:15 Low Beam Left: Short to Battery or Open Circuit Continuous on-demand DTC that is set when the BCM detects an open circuit or a short to voltage in the left low beam output circuit.
B1D01:11 Low Beam Right: Short to Ground Continuous on-demand DTC that is set when the BCM detects a short to ground in the right low beam output circuit.
B1D01:15 Low Beam Right: Short to Battery or Open Circuit Continuous on-demand DTC that is set when the BCM detects an open circuit or a short to voltage in the right low beam output circuit.
U3000:49 Control Module: Internal Electronic Failure This DTC is set when the BCM has permanently disabled the 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. CORRECT the cause of the excessive current draw before installing a new BCM. For more information on BCM field effect transistor (FET) protection,
REFER to: Module-Controlled Functions - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

Possible Sources

  • Fuse
  • Lamp
  • Wiring, Terminals or Connectors
  • Headlamp Assembly
  • Headlight Switch
  • BCM

Visual Inspection and Preliminary Diagnosis

  • Inspect the bulbs and make sure they are in good condition.
  • Inspect BJB fuses 11 (15A) (left headlamp) and 10 (15A) (right headlamp).
  • Inspect the headlamp assembly for damage.

PINPOINT TEST A: ONE OR BOTH LOW BEAM HEADLAMPS INOPERATIVE
A1 DETERMINE IF ONE OR BOTH LOW BEAM HEADLAMPS ARE INOPERATIVE
  • Set the headlamp switch to the HEADLAMPS ON position.

Are both low beams inoperative?
Yes GO to A8
No CHECK BJB fuse 11 (15A) (left headlamp) or 10 (15A) (right headlamp) is OK. If OK, GO to A2. If not OK, REFER to the Wiring Diagrams Manual to determine the possible causes of the short circuit.
A2 CHECK THE HEADLAMP VOLTAGE
  • Turn the headlamp switch to the OFF position.
  • Disconnect: Left Headlamp C1021 or Right Headlamp C1041.
  • Turn the headlamp switch to the headlamps on position.
  • Action:
    Click to display the connectors

    LH headlamp


    Positive lead Measurement/Action Negative lead
    C1021-2 Ground

    Click to display the connectors

    Right headlamp


    Positive lead Measurement/Action Negative lead
    C1041-2 Ground

Is the voltage greater than 11 volts?
Yes GO to A4
No GO to A3
A3 REPEAT THE ON-DEMAND SELF-TEST AND CHECK THE HEADLAMP VOLTAGE
  • 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.
  • Turn the headlamp switch to the headlamps on position.
  • Action:
    Click to display the connectors

    LH headlamp


    Positive lead Measurement/Action Negative lead
    C1021-2 Ground

    Click to display the connectors

    Right headlamp


    Positive lead Measurement/Action Negative lead
    C1041-2 Ground

Is the voltage greater than 11 volts?
Yes GO to A5
No GO to A6
A4 CHECK THE GROUND CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors

    LH headlamp


    Positive lead Measurement/Action Negative lead
    C1021-2 C1021-7

    Click to display the connectors

    Right headlamp


    Positive lead Measurement/Action Negative lead
    C1041-2 C1041-7

Is the voltage greater than 11 volts?
Yes GO to A5
No REPAIR the circuit.
A5 CHECK THE BULB
  • Turn the headlamp switch to the off position.
  • Replace the known good low beam bulb.
  • Turn the headlamp switch to the headlamps on position.

Does the non-operating headlamp illuminate?
Yes REMOVE the known good bulb. INSTALL a new bulb.
REFER TO: Headlamp Bulb (417-01 Exterior Lighting, Removal and Installation).
CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver).
No REMOVE the known good bulb. CHECK the headlamp internal harness for an open or short circuit, and for damaged or pushed-out pins. If the harness is not OK, REPAIR the harness. If the harness is not repairable, INSTALL a new headlamp assembly.
REFER TO: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).
CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver).
A6 CHECK THE LOW BEAM FEED CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Turn the headlamp switch to the OFF position.
  • Disconnect: BCM C2280A.
  • Action:
    Click to display the connectors

    LH headlamp


    Positive lead Measurement/Action Negative lead
    C1021-2 Ground

    Click to display the connectors

    Right headlamp


    Positive lead Measurement/Action Negative lead
    C1041-2 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to A7
No REPAIR the circuit.
A7 CHECK THE LOW BEAM FEED CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors

    LH headlamp


    Positive lead Measurement/Action Negative lead
    C1021-2 C2280A-11

    Click to display the connectors

    Right headlamp


    Positive lead Measurement/Action Negative lead
    C1041-2 C2280A-7

Is the resistance less than 3 ohms?
Yes GO to A10
No REPAIR the circuit.
A8 CHECK THE BCM (BODY CONTROL MODULE) HEADLAMP SWITCH INPUT
  • Turn the headlamp switch to the off position.
  • Using the diagnostic scan tool, view the BCM parameter identification (PID) data.
  • Monitor the BCM LOW_BEAM_SW PID.
  • Turn the headlamp switch to the headlamps on position.

Does the BCM LOW_BEAM_SW PID change from Off to On?
Yes GO to A10
No GO to A9
A9 CHECK THE HEADLAMP SWITCH CIRCUIT FOR AN OPEN
  • Turn the headlamp switch to the off position.
  • Disconnect: BCM C2280F.
  • Disconnect: Headlamp Switch C205.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C205-7 C2280F-5

Is the resistance less than 3 ohms?
Yes PERFORM the headlamp switch component test.
See Wiring Diagrams, Cell 149, for circuit and connector information. If the headlamp switch fails the test, INSTALL a new headlamp switch.
REFER to: Headlamp Switch (417-01 Exterior Lighting, Removal and Installation). If the headlamp switch test passes, GO to A10.
No REPAIR the circuit.
A10 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 no TSBs apply to this concern, 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.

One or both high beam headlamps inoperative


Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms


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
B109A:12 High Beam Relay: Short to Battery Continuous on-demand DTC that sets when the BCM detects a short to battery voltage in the high beam relay control circuit.
B109A:14 High Beam Relay: Short to Ground or Open Circuit Continuous on-demand DTC that sets when the BCM detects an open circuit or a short to ground in the high beam relay control circuit.
U3000:49 Control Module: Internal Electronic Failure This DTC is set when the BCM has permanently disabled the 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. CORRECT the cause of the excessive current draw before installing a new BCM. For more information on BCM field effect transistor (FET) protection,
REFER to: Module-Controlled Functions - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

Possible Sources

  • Fuse
  • Lamp
  • Wiring, Terminals or Connectors
  • Multifunction switch
  • Headlamp Assembly
  • High beam relay
  • BCM

Visual Inspection and Preliminary Diagnosis

  • Inspect BJB fuses 17 (20A), 21 (7.5A), 37 (10A) and 38 (10A).
  • Inspect the headlamp assembly for damage.

PINPOINT TEST B: ONE OR BOTH HIGH BEAM HEADLAMPS INOPERATIVE
B1 CHECK THE LOW BEAM OPERATION
  • The ignition is on.
  • Set the headlamp switch to the headlamp on position and observe the headlamps.
  • Set the left multifunction switch to the high beam position and observe the headlamps.
  • Set the left multifunction switch to the low beam position and observe the headlamps.

Do the low beams operate?
Yes If one high beam does not operate, CHECK BJB fuse 37 (10A) (left high beam) or fuse 38 (10A) (right high beam). If OK, GO to B14. If not OK, REFER TO the Wiring Diagrams to determine possible causes of a short circuit.
If both high beams do not operate, CHECK BJB fuses 17 (20A) and 21 (7.5A). If OK, GO to B2. If not OK, REFER TO the Wiring Diagrams to determine possible causes of a short circuit.
No GO to Pinpoint Test A
B2 CHECK THE BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a scan tool, perform the BCM self-test.

Is DTC B109A:12 or B109A:14 present?
Yes For DTC B109A:12, GO to B3.
For DTC B109A:14, GO to B4.
No GO to B7
B3 CHECK THE HIGH BEAM RELAY ENERGIZE CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect: High Beam Relay.
  • Disconnect: BCM C2280D.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C2280D-3 Ground

Is there voltage present?
Yes REPAIR the circuit. CLEAR the diagnostic trouble codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver).
No GO to B5
B4 CHECK THE HIGH BEAM RELAY ENERGIZE CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect: High Beam Relay.
  • Disconnect: BCM C2280D.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C2280D-3 High beam relay pin 2

Is the resistance less than 3 ohms?
Yes GO to B5
No REPAIR the circuit.
B5 CHECK THE HIGH BEAM RELAY
  • Ignition OFF.
  • Connect: BCM C2280D.
  • INSTALL a known good high beam relay.
  • The ignition is on.
  • Turn the headlamp switch to the headlamps on position.
  • Set the left multifunction switch to the high beam position and observe the headlamps.

Do the high beams illuminate?
Yes INSTALL a new high beam relay.
No For DTC B109A:12, GO to B17.
For DTC B109A:14, GO to B6.
B6 CHECK THE HIGH BEAM RELAY COIL VOLTAGE
  • Ignition OFF.
  • Disconnect: High Beam Relay.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    High beam relay pin 1 Ground

Is the voltage greater than 11 volts?
Yes GO to B7
No CHECK BJB fuse 21 (7.5A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams Manual to determine the possible causes of the short circuit.
B7 CHECK THE BCM (BODY CONTROL MODULE) HIGH BEAM OUTPUT
  • Turn the headlamp switch to the headlamps on position.
  • Using the diagnostic scan tool, view the BCM parameter identification (PID) data.
  • Command the BCM HIGH BEAMS PID On.

Do the high beams illuminate?
Yes GO to B10
No GO to B8
B8 CHECK THE HIGH BEAM RELAY SWITCH VOLTAGE
  • Ignition OFF.
  • Disconnect: High Beam Relay.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    High beam relay pin 3 Ground

Is the voltage greater than 11 volts?
Yes GO to B9
No CHECK BJB fuse 17 (20A) for correct operation. If OK, REPAIR the circuit. If not OK, REFER TO the Wiring Diagrams to determine possible causes of a short circuit.
B9 CHECK THE HIGH BEAM RELAY
  • Ignition OFF.
  • Connect: BCM C2280D.
  • INSTALL a known good high beam relay.
  • The ignition is on.
  • Turn the headlamp switch to the headlamps on position.
  • Set the left multifunction switch to the high beam position.

Do the high beams illuminate?
Yes INSTALL a new high beam relay.
No REPAIR the high beam relay output circuit for an open.
B10 CHECK THE FLASH-TO-PASS FUNCTION
  • Turn the headlamp switch to the headlamps on position.
  • Set the left multifunction switch to the flash-to-pass position.

Do the high beams illuminate?
Yes GO to B12
No GO to B11
B11 CHECK THE LEFT MULTIFUNCTION SWITCH GROUND
  • Ignition OFF.
  • Disconnect: Left Multifunction Switch C202.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C202-9 Ground

Is the resistance less than 3 ohms?
Yes GO to B12
No REPAIR the circuit.
B12 CHECK THE LEFT MULTIFUNCTION SWITCH
  • Ignition OFF.
  • Turn the headlamp switch to the headlamps on position.
  • Connect a fused jumper wire:
    Click to display connectors
    Positive lead Measurement/Action Negative lead
    C202-9 C202-10

Do the high beams illuminate?
Yes REMOVE the fusible link. INSTALL a new left multifunction switch.
REFER TO: Multifunction Switch on Steering Column, Left (211-05 Steering Wheel and Column Electrical Components, Removal and Installation).
No If the high beam and low beam functions do not operate, REMOVE the fusible link. GO to B17.
If only the high beam function does not operate, REMOVE the fusible link. GO to B13.
B13 CHECK THE LEFT MULTIFUNCTION HIGH BEAM SWITCH CIRCUIT FOR AN OPEN
  • Turn the headlamp switch to the off position.
  • Disconnect: BCM C2280F.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C202-10 C2280F-13

Is the resistance less than 3 ohms?
Yes GO TO B17
No REPAIR the circuit.
B14 CHECK THE HEADLAMP VOLTAGE
  • Ignition OFF.
  • Turn the headlamp switch to the off position.
  • Disconnect: Left Headlamp C1021 or Right Headlamp C1041.
  • Set the headlamp switch to the headlamps position and the multifunction switch to the high beam position.
  • Action:
    Click to display the connectors

    LH headlamp


    Positive lead Measurement/Action Negative lead
    C1021-4 Ground

    Click to display the connectors

    Right headlamp


    Positive lead Measurement/Action Negative lead
    C1041-4 Ground

Is the voltage greater than 11 volts?
Yes GO TO B15
No REPAIR the circuit.
B15 CHECK THE HIGH BEAM GROUND CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors

    LH headlamp


    Positive lead Measurement/Action Negative lead
    C1021-4 C1021-10

    Click to display the connectors

    Right headlamp


    Positive lead Measurement/Action Negative lead
    C1041-4 C1041-10

Is the voltage greater than 11 volts?
Yes GO TO B16
No REPAIR the circuit.
B16 CHECK THE BULB
  • Turn the headlamp switch to the off position.
  • Replace the known good high beam bulb.
  • Set the headlamp switch to the headlamps position and the multifunction switch to the high beam position.

Does the non-operating high beam illuminate?
Yes REMOVE the known good bulb. INSTALL a new bulb.
REFER TO: Headlamp Bulb (417-01 Exterior Lighting, Removal and Installation).
No REMOVE the known good bulb. CHECK the headlamp internal harness for an open or short circuit, and for damaged or pushed-out pins. If the harness is not OK, REPAIR the harness. If the harness is not repairable, INSTALL a new headlamp assembly.
REFER TO: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).
B17 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 no TSBs apply to this concern, 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.

Low beam is continuously on


Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms


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
B10A6:92 Main Light Switch: Performance or Incorrect Operation

Continuous on-demand DTC that sets when the BCM detects one of the following conditions:

  • more than one input is grounded simultaneously for more than 30 seconds.
  • the off input is not grounded during the BCM self-test.
  • The parking lamps, headlamps or automatic entry (if equipped) are grounded during the BCM self-test.
B1D00:15 Low Beam Left: Short to Battery or Open Circuit Continuous on-demand DTC that is set when the BCM detects an open circuit or a short to voltage in the left low beam output circuit.
B1D01:15 Low Beam Right: Short to Battery or Open Circuit Continuous on-demand DTC that is set when the BCM detects an open circuit or a short to voltage in the right low beam output circuit.
U3000:49 Control Module: Internal Electronic Failure This DTC is set when the BCM has permanently disabled the 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. CORRECT the cause of the excessive current draw before installing a new BCM. For more information on BCM field effect transistor (FET) protection,
REFER to: Module-Controlled Functions - System Operation and Component Description (419-10 Multifunction Electronic Modules, 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 C: LOW BEAM HEADLAMPS CONSTANTLY ON
C1 CHECK THE BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Turn the headlamp switch to the off position.
  • Using a scan tool, perform the BCM self-test.

Is DTC B10A6:92, B1D00:15 or B1D01:15 present?
Yes For DTC B10A6:92 GO to C2.
For DTC B1D00:15 or B1D01:15 GO to C5.
No
C2 CHECK THE HEADLAMP SWITCH GROUND CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect: Headlamp Switch C205.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C205-3 Ground

Is the resistance less than 3 ohms?
Yes PERFORM the headlamp switch component test.
Refer to Wiring Diagrams Cell 149 for schematic and connector information. If the headlamp switch fails the test, INSTALL a new headlamp switch.
REFER TO: Headlamp Switch (417-01 Exterior Lighting, Removal and Installation). If the headlamp switch test passes, GO to C3.
No REPAIR the circuit.
C3 CHECK THE HEADLAMP SWITCH CIRCUITS FOR A SHORT TO GROUND
  • Disconnect: BCM C2280F.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C205-2 Ground
    C205-4 Ground
    C205-6 Ground
    C205-7 Ground

Is the resistance greater than 10000 ohms?
Yes GO TO C4
No REPAIR the faulty circuit.
C4 CHECK THE HEADLAMP OFF CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C205-6 C2280F-4

Is the resistance less than 3 ohms?
Yes GO to C6
No REPAIR the circuit.
C5 CHECK THE LOW BEAM VOLTAGE SUPPLY CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect: BCM C2280A.
  • Disconnect: LH Headlamp C1021.
  • Disconnect: RH Headlamp C1041.
  • The ignition is on.
  • Action:
    Click to display the connectors

    LH headlamp


    Positive lead Measurement/Action Negative lead
    C1021-2 Ground

    Click to display the connectors

    Right headlamp


    Positive lead Measurement/Action Negative lead
    C1041-2 Ground

Is there voltage present?
Yes REPAIR the faulty circuit.
No GO to C6
C6 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 no TSBs apply to this concern, 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.

High beam headlamps constantly on


Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Symptoms


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
B1007:92 High Beam Headlamp Switch: Malfunction or Incorrect Operation On-demand continuous DTC that is set when the BCM high beam or flash-to-pass input is shorted to ground during the BCM self-test.
B109A:14 High Beam Relay: Short to Ground or Open Circuit Continuous on-demand DTC that sets when the BCM detects an open circuit or a short to ground in the high beam relay control circuit.
U3000:49 Control Module: Internal Electronic Failure This DTC is set when the BCM has permanently disabled the 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. CORRECT the cause of the excessive current draw before installing a new BCM. For more information on BCM field effect transistor (FET) protection,
REFER to: Module-Controlled Functions - System Operation and Component Description (419-10 Multifunction Electronic Modules, Description and Operation).

Possible Sources

  • Wiring, Terminals or Connectors
  • Multifunction switch
  • High beam relay
  • BCM

Visual Inspection and Preliminary Diagnosis

  • Inspect the multifunction switch for damage.

PINPOINT TEST D: HIGH BEAM HEADLAMPS CONSTANTLY ON
D1 CHECK BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Turn the headlamp switch to the off position.
  • Using a scan tool, perform the BCM self-test.

Is DTC B1007:92 or B109A:14 present?
Yes For DTC B1007:92 GO to D2.
For DTC B109A:14 GO to D5.
No GO to D7
D2 BCM (BODY CONTROL MODULE) PARAMETER IDENTIFICATION (PIDS) MONITOR
  • Turn the headlamp switch to the off position.
  • Set the LH multifunction switch to the low beam position.
  • Using the diagnostic scan tool, view the BCM parameter identification (PID) data.
  • Monitor the BCM HIGH_BEAM_SW and FLASH-to-PASS Parameter Identification (PID).

Do the Parameter Identification (PID) indicate high beam and flash-to-pass function is off?
Yes GO to D9
No GO to D3
D3 CHECK THE LH (LEFT-HAND) MULTIFUNCTION SWITCH
  • Ignition OFF.
  • Disconnect: Left Multifunction Switch C202.
  • The ignition is on.
  • Turn the headlamp switch to the off position.
  • Set the LH multifunction switch to the low beam position.
  • Using the diagnostic scan tool, view the BCM parameter identification (PID) data.
  • Monitor the BCM HIGH_BEAM_SW and FLASH-to-PASS Parameter Identification (PID).

Do the Parameter Identification (PID) indicate high beam and flash-to-pass function is off?
Yes INSTALL a new LH multifunction switch.
REFER TO: Steering Column LH Multifunction Switch (211-05 Steering Wheel and Column Electrical, Component Removal and Installation).
No GO to D4
D4 CHECK THE LH (LEFT-HAND) MULTIFUNCTION SWITCH HIGH BEAM OR FLASH-TO-PASS CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect: BCM C2280F.
  • Action:
    Click to display the connectors

    High Beam


    Positive lead Measurement/Action Negative lead
    C202-10 Ground

    Click to display the connectors

    Flash-To-Pass


    Positive lead Measurement/Action Negative lead
    C202-5 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to D9
No REPAIR the circuit.
D5 CHECK THE HIGH BEAM RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect: High Beam Relay.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    High beam relay pin 1 High beam relay pin 2

Is there voltage present?
Yes GO to D6
No GO to D9
D6 CHECK THE HIGH BEAM RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect: BCM C2280D.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    High beam relay pin 2 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to D9
No REPAIR the circuit.
D7 CHECK THE HIGH BEAM RELAY
  • Ignition OFF.
  • Disconnect: High Beam Relay.
  • The ignition is on.
  • Turn the headlamp switch to the off position.
  • Set the LH multifunction switch to the low beam position.

Do the high beams illuminate?
Yes GO to D8
No INSTALL a new high beam relay.
D8 CHECK THE HIGH BEAM SUPPLY CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect: LH Headlamp C1021.
  • Disconnect: RH Headlamp C1041.
  • The ignition is on.
  • Action:
    Click to display the connectors

    LH headlamp


    Positive lead Measurement/Action Negative lead
    C1021-4 Ground

    Click to display the connectors

    Right headlamp


    Positive lead Measurement/Action Negative lead
    C1041-4 Ground

Is there voltage present?
Yes REPAIR the circuit.
No GO to D9
D9 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 no TSBs apply to this concern, 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.

Flash-to-Pass function is inoperative

Normal Operation and Fault Symptoms


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

Possible Sources

  • Wiring, Terminals or Connectors
  • Multifunction switch
  • BCM

Visual Inspection and Preliminary Diagnosis

  • Inspect the multifunction switch for damage.

PINPOINT TEST E: FLASH-TO-PASS FUNCTION INOPERATIVE
E1 CHECK THE HIGH BEAM OPERATION
  • The ignition is on.
  • Turn the headlamp switch to the headlamps on position.
  • Turn the high beam on and off using the high beam function of the multifunction switch.

Does the high beam operate correctly?
Yes GO to E2
No GO to Pinpoint Test B
E2 BCM (BODY CONTROL MODULE) PARAMETER IDENTIFICATION (PIDS) MONITOR
  • Turn the headlamp switch to the headlamps on position.
  • Set the left multifunction switch to the flash-to-pass position.
  • Using the diagnostic scan tool, view the BCM parameter identification (PID) data.
  • Monitor the BCM FLASH-to-PASS PID.

Does the FLASH-to-PASS PID indicate on?
Yes GO to E5
No GO to E3
E3 CHECK THE LH (LEFT-HAND) MULTIFUNCTION SWITCH
  • Ignition OFF.
  • Disconnect: Left Multifunction Switch C202.
  • The ignition is on.
  • Turn the headlamp switch to the headlamps on position.
  • Connect a fused jumper wire:
    Click to display connectors
    Positive lead Measurement/Action Negative lead
    C202-9 C202-5

Do the high beams illuminate?
Yes REMOVE the fusible link. INSTALL a new left multifunction switch.
REFER TO: Multifunction Switch on Steering Column, Left (211-05 Steering Wheel and Column Electrical Components, Removal and Installation).
No REMOVE the fuse jumper. GO to E4.
E4 CHECK THE LH (LEFT-HAND) MULTIFUNCTION SWITCH FLASH-TO-PASS CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect: BCM C2280F.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C202-5 C2280F-24

Is the resistance less than 3 ohms?
Yes GO to E5
No REPAIR the circuit.
E5 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 no TSBs apply to this concern, 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 Fiesta quiz: every answer comes with an explanation and a link to the manual page.