Ford Fiesta Quiz
Lighting

Turn Signal and Hazard Lamps. 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
~21min read

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: BCM

DTC Chart


Trouble Code Description Action
B123A:11 Left front turn signal: short to ground GO to Pinpoint Test C
B123A: 15 Left front turn signal: short to battery or open circuit GO to Pinpoint Test C
B123B: 11 Right front turn signal: short to ground GO to Pinpoint Test C
B123B: 15 Right front turn signal: short to battery or open circuit GO to Pinpoint Test C
B1247:11 Left rear turn signal: short to ground GO to Pinpoint Test C
B1247:15 Left rear turn signal: short to battery or open circuit GO to Pinpoint Test C
B1248:11 Right rear turn signal: short to ground GO to Pinpoint Test C
B1248:15 Right rear turn signal: short to battery or open circuit GO to Pinpoint Test C
B1D35:23 Hazard Switch: Signal Low GO to Pinpoint Test D
B1D36:92 Turn Signal Switch: Performance or Incorrect Operation GO to Pinpoint Test B
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: Turn Signals and Hazard Warning

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).
Turn signal function inoperative Refer to Pinpoint Test GO to Pinpoint Test A
Turn signal function always on Refer to Pinpoint Test GO to Pinpoint Test B
One turn signal lamp inoperative or constantly on Refer to Pinpoint Test GO to Pinpoint Test C
Hazard lamp function inoperative or constantly on Refer to Pinpoint Test GO to Pinpoint Test D

Pinpoint Tests

Turn signal function inoperative


For circuit and connector information, refer to Wiring Diagrams Cell 90.

Normal Operation and Fault Symptoms


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

Possible Sources

  • Fuse
  • Wiring, Terminals or Connectors
  • Multifunction switch
  • BCM

Visual Inspection and Preliminary Diagnosis

  • Check the BJB 39 (15A) fuse for condition.

PINPOINT TEST A: TURN SIGNAL FUNCTION INOPERATIVE
A1 CHECK BCM (BODY CONTROL MODULE) TURN SIGNAL SWITCH INPUT
  • The ignition is on.
  • Using the diagnostic scan tool, view the BCM parameter identification (PID) data.
  • Monitor the BCM TRN_SIG_SW_L and TRN_SIG_SW_R parameter identifications (PIDs).
  • Move the left multifunction switch to the left turn position, the right turn position and the center position.

Do the BCM TRN_SIG_SW_L and TRN_SIG_SW_R parameter identifications (PIDs) change to On when selected?
Yes CHECK that the BJB 39 (15A) fuse is in good condition. If OK, go to A4. If not OK, REFER to the Wiring Diagrams manual to determine the possible cause of the short circuit.
No If both the TRN_SIG_SW_L and TRN_SIG_SW_R parameter identifications (PIDs) are always off, GO to A2.
If only one of the TRN_SIG_SW_L or TRN_SIG_SW_R parameter identifications (PIDs) is always off, GO to A3.
A2 CHECK LEFT (LH) MULTIFUNCTION SWITCH GROUND FOR OPEN
  • 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 PERFORM the multifunction switch component test.
See Wiring Diagrams, Cell 149, for schematic and connector information. If the multifunction switch fails the test, 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). If the left multifunction switch test passes, GO to A4.
No REPAIR the circuit.
A3 CHECK BCM (BODY CONTROL MODULE) TURN SIGNAL SWITCH INPUT CIRCUITS FOR OPEN
  • Ignition OFF.
  • Disconnect: Left Multifunction Switch C202.
  • Disconnect: BCM C2280F.
  • Action:
    Click to display the connectors

    Left turn lamp


    Positive lead Measurement/Action Negative lead
    C202-4 C2280F-15

    Click to display the connectors

    Right turn lamp


    Positive lead Measurement/Action Negative lead
    C202-8 C2280F-16

Is the resistance less than 3 ohms?
Yes PERFORM the multifunction switch component test. Refer to
See Wiring Diagrams, Cell 149, for schematic and connector information. If the multifunction switch fails the test, 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). If the left multifunction switch test passes, GO to A4.
No REPAIR the circuit.
A4 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.

Turn signal function always on


For circuit and connector information, refer to Wiring Diagrams Cell 90.

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
B1D36:92 Turn Signal Switch: Performance or Incorrect Operation

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

  • Both turn signal circuit inputs are grounded simultaneously for more than 2 seconds.
  • The turn signal circuit inputs are grounded during the BCM self-test.

Possible Sources

  • Wiring, Terminals or Connectors
  • Multifunction switch
  • BCM

PINPOINT TEST B: TURN SIGNAL FUNCTION ALWAYS ON
B1 CHECK BCM (BODY CONTROL MODULE) TURN SIGNAL SWITCH INPUT
  • The ignition is on.
  • Using the diagnostic scan tool, view the BCM parameter identification (PID) data.
  • Monitor the BCM TRN_SIG_SW_L and TRN_SIG_SW_R parameter identifications (PIDs).
  • Move the left multifunction switch to the left turn position, the right turn position and the center position.

Do the BCM TRN_SIG_SW_L and TRN_SIG_SW_R parameter identifications (PIDs) change to Off when not selected?
Yes GO to B3
No GO to B2
B2 CHECK BCM (BODY CONTROL MODULE) TURN SIGNAL SWITCH INPUT CIRCUITS FOR SHORT TO GROUND
  • Ignition OFF.
  • Disconnect: Left Multifunction Switch C202.
  • Disconnect: BCM C2280F.
  • Action:
    Click to display the connectors

    Left turn lamp


    Positive lead Measurement/Action Negative lead
    C202-4 Ground

    Click to display the connectors

    Right turn lamp


    Positive lead Measurement/Action Negative lead
    C202-8 Ground

Is the resistance greater than 10000 Ohms?
Yes PERFORM the multifunction switch component test.
See Wiring Diagrams, Cell 149, for schematic and connector information. If the multifunction switch fails the test, 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). If the left multifunction switch passes the test, GO to B3.
No REPAIR the circuit.
B3 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 turn signal lamp inoperative or always on


For circuit and connector information, refer to Wiring Diagrams Cell 90.

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
B123A:11 Left front turn signal: short to ground Continuous DTC set on demand when the BCM detects a short to ground in the left front turn signal lamp supply circuit.
B123A: 15 Left front turn signal: short to battery or open circuit Continuous DTC set on demand when the BCM detects an open circuit or a short to voltage in the left front turn signal lamp supply circuit.
B123B: 11 Right front turn signal: short to ground Continuous DTC set on demand when the BCM detects a short to ground in the right front turn signal lamp supply circuit.
B123B: 15 Right front turn signal: short to battery or open circuit Continuous DTC set on demand when the BCM detects an open circuit or a short to voltage in the right front turn signal lamp supply circuit.
B1247:11 Left rear turn signal: short to ground Continuous DTC set on demand when the BCM detects a short to ground in the left rear turn signal lamp voltage supply circuit.
B1247:15 Left rear turn signal: short to battery or open circuit Continuous DTC set on demand when the BCM detects an open circuit or a short to voltage in the left rear turn signal lamp supply circuit.
B1248:11 Right rear turn signal: short to ground Continuous DTC set on demand when the BCM detects a short to ground in the right rear turn signal lamp voltage supply circuit.
B1248:15 Right rear turn signal: short to battery or open circuit Continuous DTC set on demand when the BCM detects an open circuit or a short to voltage in the right rear turn signal lamp supply 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

  • Lamp
  • Wiring, Terminals or Connectors
  • BCM

PINPOINT TEST C: ONE TURN SIGNAL LAMP INOPERATIVE OR ALWAYS ON
C1 DETERMINE IF TURN SIGNAL LAMP IS ALWAYS ON
  • The ignition is on.
  • Activate the hazard warning function.
  • Observe the front and rear turn signal lamps.

Is any turn signal lamp always on?
Yes GO to C3
No If the front and rear lamps are inoperative and the exterior mirror turn lamp operates correctly, GO to C16.
For the front turn signal lamp, GO to C4.
For the exterior mirror turn lamp, GO to C7.
For the rear turn signal lamp, 4-door vehicles only, GO to C2.
For the rear turn signal lamp, 5-door vehicles only, GO to C11.
C2 CHECK STOP LAMP OPERATION
  • Depress the brake pedal and observe the stop lamps.

Do both stop lamps operate?
Yes GO TO C16
No CHECK the inoperative stop lamps.
REFER to: Stop Lamps (417-01 Exterior Lighting, Diagnosis and Testing).
C3 CHECK THE TURN LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect: BCM C2280A (Front Lamp and Outside Rearview Mirror Lamp)
  • Disconnect: BCM C2280C (Rear Lamps)
  • The ignition is on.

Does the corresponding turn signal lamp remain on?
Yes REPAIR the faulty circuit.
No GO TO C16
C4 CHECK THE FRONT TURN LAMP VOLTAGE
  • Ignition OFF.
  • Disconnect: LH Headlamp C1021 or RH Headlamp C1041.
  • The ignition is on.
  • Activate the hazard warning lamp function.
  • Action:
    Click to display the connectors

    Left turn lamp


    Positive lead Measurement/Action Negative lead
    C1021-5 Ground

    Click to display the connectors

    Right turn lamp


    Positive lead Measurement/Action Negative lead
    C1041-5 Ground

Does the voltage change from 0 to more than 11 volts?
Yes GO to C6
No GO to C5
C5 REPEAT THE ON-DEMAND SELF-TEST AND CHECK THE FRONT TURN LAMP VOLTAGE
  • Turn off the hazard warning function.
  • 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.
  • Activate the hazard warning lamp function.
  • Action:
    Click to display the connectors

    Left turn lamp


    Positive lead Measurement/Action Negative lead
    C1021-5 Ground

    Click to display the connectors

    Right turn lamp


    Positive lead Measurement/Action Negative lead
    C1041-5 Ground

Does the voltage change from 0 to more than 11 volts?
Yes CHECK the headlamp internal harness for an open or short circuit and damaged or pushed-out contacts. If the harness is good, INSTALL a new bulb. If the harness is not good, REPAIR the harness. If the wiring harness cannot be repaired, 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).
No GO TO C9
C6 CHECK THE GROUND CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors

    Left turn lamp


    Positive lead Measurement/Action Negative lead
    C1021-5 C1021-10

    Click to display the connectors

    Right turn lamp


    Positive lead Measurement/Action Negative lead
    C1041-5 C1041-10

Does the voltage change from 0 to more than 11 volts?
Yes CHECK the headlamp internal harness for an open or short circuit and damaged or pushed-out contacts. If the harness is good, INSTALL a new bulb. If the harness is not good, REPAIR the harness. If the wiring harness cannot be repaired, INSTALL a new headlamp assembly.
REFER TO: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No REPAIR the circuit.
C7 CHECK THE MIRROR TURN LAMP VOLTAGE
  • Ignition OFF.
  • Disconnect: LH Outside Mirror C521 or RH Outside Mirror C626.
  • The ignition is on.
  • Activate the hazard warning lamp function.
  • Action:
    Click to display the connectors

    LH Outside Mirror


    Positive lead Measurement/Action Negative lead
    C521-8 Ground

    Click to display the connectors

    Right outside mirror


    Positive lead Measurement/Action Negative lead
    C626-8 Ground

Does the voltage change from 0 to more than 11 volts?
Yes GO TO C8
No GO TO C9
C8 CHECK THE OUTSIDE MIRROR GROUND CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors

    LH Outside Mirror


    Positive lead Measurement/Action Negative lead
    C521-8 C521-2

    Click to display the connectors

    Right outside mirror


    Positive lead Measurement/Action Negative lead
    C626-8 C626-2

Does the voltage change from 0 to more than 11 volts?
Yes CHECK the outside mirror harness for an open or short circuit and damaged or pushed-out contacts. If the harness is good, INSTALL a new bulb. If the harness is not good, REPAIR the harness. If the wiring harness cannot be repaired, INSTALL a new outside mirror.
REFER TO: Outside Mirror (501-09 Rearview Mirrors, Removal and Installation).
No REPAIR the circuit.
C9 CHECK THE FRONT TURN/MIRROR LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Turn off the hazard warning function.
  • Disconnect: BCM C2280A
  • Disconnect: LH Headlamp C1021 and LH Outside Mirror C521 (LH turn lamp inoperative).
  • Disconnect: RH Headlamp C1041 and RH Outside Mirror C626 (RH turn lamp inoperative).
  • Action:
    Click to display the connectors

    LH Turn Lamp/Outside Rearview Mirror Lamp


    Positive lead Measurement/Action Negative lead
    C2280A-5 Ground

    Click to display the connectors

    RH Turn Lamp/Outside Rearview Mirror Lamp


    Positive lead Measurement/Action Negative lead
    C2280A-6 Ground

Is the resistance greater than 10000 Ohms?
Yes GO TO C10
No REPAIR the circuit. CLEAR the diagnostic trouble codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver).
C10 CHECK THE FRONT TURN/MIRROR LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors

    Left turn lamp


    Positive lead Measurement/Action Negative lead
    C1021-5 C2280A-5

    Click to display the connectors

    Right turn lamp


    Positive lead Measurement/Action Negative lead
    C1041-5 C2280A-6

    Click to display the connectors

    LH Outside Rearview Mirror Lamp


    Positive lead Measurement/Action Negative lead
    C521-8 C2280A-5

    Click to display the connectors

    RH Outside Rearview Mirror Lamp


    Positive lead Measurement/Action Negative lead
    C626-8 C2280A-6

Is the resistance less than 3 ohms?
Yes GO TO C16
No REPAIR the circuit.
C11 CHECK THE REAR TURN LAMP VOLTAGE
  • Ignition OFF.
  • Disconnect: Left rear lamp C414 or right rear lamp C417 not working.
  • The ignition is on.
  • Activate the hazard warning lamp function.
  • Action:
    Click to display the connectors

    5-Door LH Turn Lamp


    Positive lead Measurement/Action Negative lead
    C414-2 Ground

    Click to display the connectors

    5-Door RH Turn Lamp


    Positive lead Measurement/Action Negative lead
    C417-2 Ground

Does the voltage change from 0 to more than 11 volts?
Yes GO TO C13
No GO TO C12
C12 REPEAT THE ON-DEMAND SELF-TEST AND CHECK THE REAR TURN LAMP VOLTAGE
  • Turn off the hazard warning function.
  • 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.
  • Activate the hazard warning lamp function.
  • Action:
    Click to display the connectors

    5-Door LH Turn Lamp


    Positive lead Measurement/Action Negative lead
    C414-2 Ground

    Click to display the connectors

    5-Door RH Turn Lamp


    Positive lead Measurement/Action Negative lead
    C417-2 Ground

Is the voltage greater than 11 volts?
Yes CHECK that the lamp is good. If good, REPAIR or INSTALL a new rear lamp harness. If not good, INSTALL a new lamp.
REFER TO: Rear Lamp Bulb (417-01 Exterior Lighting, Removal and Installation).
No GO TO C14
C13 CHECK THE REAR LAMP GROUND CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors

    5-Door LH Turn Lamp


    Positive lead Measurement/Action Negative lead
    C414-2 C414-6

    Click to display the connectors

    5-Door RH Turn Lamp


    Positive lead Measurement/Action Negative lead
    C417-2 C417-6

Does the voltage change from 0 to more than 11 volts?
Yes CHECK that the lamp is good. If good, REPAIR or INSTALL a new rear lamp harness. If not good, INSTALL a new lamp.
REFER TO: Rear Lamp Bulb (417-01 Exterior Lighting, Removal and Installation).
No REPAIR the circuit.
C14 CHECK THE REAR TURN LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Turn off the hazard warning function.
  • Disconnect: BCM C2280C.
  • Action:
    Click to display the connectors

    5-Door LH Turn Lamp


    Positive lead Measurement/Action Negative lead
    C414-2 Ground

    Click to display the connectors

    5-Door RH Turn Lamp


    Positive lead Measurement/Action Negative lead
    C417-2 Ground

Is the resistance greater than 10000 Ohms?
Yes GO TO C15
No REPAIR the circuit. CLEAR the diagnostic trouble codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver).
C15 CHECK THE REAR TURN LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors

    5-Door LH Turn Lamp


    Positive lead Measurement/Action Negative lead
    C414-2 C2280C-12

    Click to display the connectors

    5-Door RH Turn Lamp


    Positive lead Measurement/Action Negative lead
    C417-2 C2280C-13

Is the resistance less than 3 ohms?
Yes GO TO C16
No REPAIR the circuit.
C16 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.

Hazard lamp function inoperative or always on


For circuit and connector information, refer to Wiring Diagrams Cell 90.

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
B1D35:23 Hazard Switch: Signal Low Continuous DTC on-demand which sets when the BCM detects a short to ground in the hazard function input circuit.

Possible Sources

  • Wiring, Terminals or Connectors
  • FCIM
  • BCM

PINPOINT TEST D: HAZARD FUNCTION INOPERATIVE OR ALWAYS ON
D1 CHECK BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Using a scan tool, perform the BCM self-test.

Is DTC B1D35:23 present?
Yes GO to D2
No GO to D4
D2 FCIM (FRONT CONTROLS INTERFACE MODULE) ISOLATION
  • Ignition OFF.
  • Disconnect: FCIM C2402.
  • The ignition is on.
  • Using a scan tool, clear the diagnostic trouble codes (DTCs) and repeat the BCM self-test.

Is DTC B1D35:23 returned?
Yes GO to D3
No INSTALL a new FCIM.
Vehicles with AM/FM/CD,
REFER TO: Front Controls Interface Module (FCIM) (415-00A Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC, Removal and Installation). Vehicles with AM/FM/CD/SYNC,
REFER TO: Front Controls Interface Module (FCIM) (415-00A Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC, Removal and Installation). Vehicles with AM/FM/CD/SYNC/touchscreen,
REFER TO: Front Controls Interface Module (FCIM) (415-00B Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC/touchscreen, Removal and Installation).
D3 CHECK THE HAZARD SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect: BCM C2280F.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C2280F-21 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to D7
No REPAIR the circuit.
D4 HAZARD SWITCH BYPASS
  • Ignition OFF.
  • Disconnect: FCIM C2402.
  • The ignition is on.
  • Using the diagnostic scan tool, view the BCM parameter identification (PID) data.
  • Monitor the BCM HAZARD_LP_SW PID.
  • Connect a fused jumper wire:
    Click to display connectors
    Positive lead Measurement/Action Negative lead
    C2402-1 Ground

Does the PID show PRESSED IN?
Yes REMOVE the fusible link. GO to D6
No GO to D5
D5 CHECK THE HAZARD SWITCH INPUT CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect: BCM C2280F.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C2402-1 C2280F-21

Is the resistance less than 3 ohms?
Yes GO to D7
No REPAIR the circuit.
D6 CHECK THE FCIM (FRONT CONTROLS INTERFACE MODULE) OPERATION
  • Disconnect and inspect the FCIM connector.
  • 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 FCIM connector. Make sure it is fully seated and clicks into place.
  • 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 TSB applies to this concern, INSTALL a new FCIM.
Vehicles with AM/FM/CD,
REFER TO: Front Controls Interface Module (FCIM) (415-00A Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC, Removal and Installation). Vehicles with AM/FM/CD/SYNC,
REFER TO: Front Controls Interface Module (FCIM) (415-00A Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC, Removal and Installation). Vehicles with AM/FM/CD/SYNC/touchscreen,
REFER TO: Front Controls Interface Module (FCIM) (415-00B Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC/touchscreen, 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.
D7 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.

Test yourself

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