Pinpoint Test C : All The Courtesy Lamps Stay On Continuously

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Refer to REMOTE KEYLESS ENTRY AND ALARM for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Interior Lighting - System Operation and Component Description .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
BCM B1175:01	Drivers Door Ajar Switch: General Electrical Failure	An on-demand DTC that sets when the BCM detects a fault on the LH front door ajar circuit.
BCM B1176:01	Passenger Door Ajar Switch: General Electrical Failure	An on-demand DTC that sets when the BCM detects a fault on the RH front door ajar circuit.
BCM B11C0:01	Driver Side Rear Door Ajar Switch: General Electrical Failure	An on-demand DTC that sets when the BCM detects a fault on the LH rear door ajar circuit.
BCM B11C1:01	Passenger Side Rear Door Ajar Switch: General Electrical Failure	An on-demand DTC that sets when the BCM detects a fault on the RH rear door ajar circuit.

Possible Sources

Wiring, terminals or connectors
Ajar switch
BCM

C1 CHECK THE DOOR AJAR SWITCH PARAMETER IDENTIFICATIONS (PIDS)
- Ignition ON.
- Using a diagnostic scan tool, view BCM Parameter Identifications (PIDs).
- Monitor the BCM DOOR_SW_DRVR, DOOR_SW_PSGR, DOOR_SW_LR and DOOR_SW_RR Parameter Identifications (PIDs) while opening and closing all the doors.
Do all the door ajar switch PID values agree with the door positions?

Yes For the interior courtesy lamps, GO to Pinpoint Test D . For the puddle lamps, GO to Pinpoint Test G

No GO to C2

C2 BYPASS THE SUSPECT DOOR LATCH

Disconnect suspect door latch.

Connect a fused jumper wire:

LH Front Door Ajar Switch

Positive Lead	Measurement / Action	Negative Lead
C526-1	Courtesy of FORD MOTOR COMPANY	C526-2

RH Front Door Ajar Switch

Positive Lead	Measurement / Action	Negative Lead
C602-1	Courtesy of FORD MOTOR COMPANY	C602-2

LH Rear Door Ajar Switch

Positive Lead	Measurement / Action	Negative Lead
C715-1	Courtesy of FORD MOTOR COMPANY	C715-2

RH Rear Door Ajar Switch

Positive Lead	Measurement / Action	Negative Lead
C820-1	Courtesy of FORD MOTOR COMPANY	C820-2

Using a diagnostic scan tool, view BCM Parameter Identifications (PIDs).

Monitor the BCM DOOR_SW_DRVR, DOOR_SW_PSGR, DOOR_SW_LR and DOOR_SW_RR Parameter Identifications (PIDs).

Does the PID indicate the door in question is closed?

Yes	REMOVE the fused jumper wire. For a front door, INSTALL a new front door latch. REFER to: Front Door Latch . . For a SuperCab rear door, INSTALL a new rear door ajar switch. For a SuperCrew rear door, INSTALL a new rear door latch. REFER to: Rear Door Latch - SuperCrew .

No	REMOVE the fused jumper wire. GO to C3

C3 BYPASS THE DOOR LATCH GROUND CIRCUIT

Connect a fused jumper wire:

LH Front Door Ajar Switch

Positive Lead	Measurement / Action	Negative Lead
C526-1	Courtesy of FORD MOTOR COMPANY	Ground

RH Front Door Ajar Switch

Positive Lead	Measurement / Action	Negative Lead
C602-1	Courtesy of FORD MOTOR COMPANY	Ground

LH Rear Door Ajar Switch

Positive Lead	Measurement / Action	Negative Lead
C715-1	Courtesy of FORD MOTOR COMPANY	Ground

RH Rear Door Ajar Switch

Positive Lead	Measurement / Action	Negative Lead
C820-1	Courtesy of FORD MOTOR COMPANY	Ground

Monitor the BCM DOOR_SW_DRVR, DOOR_SW_PSGR, DOOR_SW_LR and DOOR_SW_RR Parameter Identifications (PIDs).

Does the PID indicate the door in question is closed?

Yes	REMOVE the fused jumper wire. REPAIR the ground circuit for an open.

No	REMOVE the fused jumper wire. GO to C4

C4 CHECK THE SUSPECT DOOR AJAR SWITCH INPUT CIRCUIT FOR AN OPEN

Disconnect BCM C2280E.

Measure:

LH Front Door Ajar Switch

Positive Lead	Measurement / Action	Negative Lead
C526-1	Courtesy of FORD MOTOR COMPANY	C2280E-33

RH Front Door Ajar Switch

Positive Lead	Measurement / Action	Negative Lead
C602-1	Courtesy of FORD MOTOR COMPANY	C2280E-21

LH Rear Door Ajar Switch

Positive Lead	Measurement / Action	Negative Lead
C715-1	Courtesy of FORD MOTOR COMPANY	C2280E-46

RH Rear Door Ajar Switch

Positive Lead	Measurement / Action	Negative Lead
C820-1	Courtesy of FORD MOTOR COMPANY	C2280E-19

Is the resistance less than 3 ohms?

Yes

GO to C5

No	REPAIR the door ajar input circuit in question.

C5 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM connectors and related in-line connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the BCM connectors and related in-line connectors. Make sure they seat and latch correctly.

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, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Refer to BCM Guided Routine .

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the Diagnostic Trouble Codes (DTCs).