LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2021 >> Mustang Mach 1, Automatic Trans >> Repair and Diagnosis >> Electrical >> Gauges >> Instrumentation, Message Center And Warning Chimes (2 Of 2) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test BM: The Headlamps On Warning Chime Is Inoperative

Pinpoint Test BM: The Headlamps On Warning Chime Is Inoperative

  1. Normal Operation and Fault Conditions 

    See Headlamps On Warning Chime. REFER to: Message Center - System Operation and Component Description .

    Possible Sources 

    • GWM concern
    • BCM concern
    • IPC

  2. BM1 CHECK THE SEATBELT WARNING CHIME OPERATION

    • Ignition OFF.

    • Ignition ON.

    • Unbuckle the driver seatbelt.

    • Monitor the seatbelt warning chime when the ignition is transitioned from OFF to RUN for 6 seconds.

    Does the seatbelt warning chime operate for approximately 6 seconds? 

    Yes  GO to  BM3
    No  GO to Pinpoint Test BV 
  3. BM2 CHECK THE HEADLAMPS OPERATION

    • NOTE: Make sure to allow the headlamp exit delay to time out before confirming the headlamp operation.

      Check the operation of the headlamps in the off position.

    Do the headlamps turn off when switched off? 

    Yes  GO to  BM3
    No  DIAGNOSE the headlamps. REFER to: Headlamps
  4. BM3 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST

    • Using a diagnostic scan tool, perform the IPC self-test.

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to DTC Chart: Instrument Panel Cluster (IPC) .
    No  GO to  BM4
  5. BM4 PERFORM THE BCM (BODY CONTROL MODULE) SELF-TEST

    • Using a diagnostic scan tool, perform the BCM self-test.

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to: Body Control Module (BCM)
    No  GO to  BM5
  6. BM5 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (CMDTCs).

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to: Communications Network
    No  INSTALL a new IPC. Refer to Instrument Panel Cluster (IPC) .