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 V: The Lights On Indicator Is Never Or Always On

Pinpoint Test V: The Lights On Indicator Is Never Or Always On

  1. Normal Operation and Fault Conditions 

    See Lights On Indicator. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

    If the park lamp status message is missing for less than 5 seconds, the IPC defaults the lights on indicator to its last indication state (on or off), based upon the last message received.

    If the park lamp status message is missing for 5 seconds or longer, the IPC defaults the lights on indicator off.

    Possible Sources 

    • Exterior lighting concern
    • Communication concern
    • BCM concern
    • GWM concern
    • IPC

  2. V1 CHECK THE PARKING LAMPS OPERATION

    • Place the headlamp switch in the PARKLAMP position.

    • Ignition ON.

    • Observe the parking lamps.

    Do the parking lights operate correctly? 

    Yes  GO to  V2
    No  REFER to: Parking, Rear and License Plate Lamps

  3. V2 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  V3

  4. V3 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  V4

  5. V4 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  GO to  V5

  6. V5 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) INDICATOR LAMP CONTROL ACTIVE COMMAND USING A DIAGNOSTIC SCAN TOOL

    • Using a diagnostic scan tool, view the IPC Parameter Identifications (PIDs).

    • Select the IPC lights on indicator (SIDELIGHT_LMP) PID.

    • Command the lights on indicator on and off while observing the indicator.

    Does the lights on indicator illuminate when commanded on and turn off when commanded off? 

    Yes  INSTALL a new BCM. REFER to: Body Control Module (BCM) .
    No  INSTALL a new IPC. Refer to Instrument Panel Cluster (IPC) .
scientia non olet · About LEMON Manuals