417-01 Exterior Lighting	2014 Fiesta
Diagnosis and Testing	Procedure revision date: 05/20/2013

Stoplamps

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

DTC Chart: BCM

BCM DTC Chart

BCM	Description	Action
C1A96:24	Brake Light Switch: Signal Stuck High	GO to Pinpoint Test C

Symptom Chart(s)

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Symptom Chart: Stoplamps

Symptom Chart

Condition	Possible Sources	Actions
A module does not respond to the diagnostic scan tool	Fuse Wiring, terminals or connectors Module	REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
All the stoplamps are inoperative	Refer to the Pinpoint Test	GO to Pinpoint Test A
One or more stoplamps are inoperative	Refer to the Pinpoint Test	GO to Pinpoint Test B
The stoplamps are on continuously	Refer to the Pinpoint Test	GO to Pinpoint Test C

Pinpoint Tests

All The Stoplamps Are Inoperative

Refer to Wiring Diagrams Cell 90 for schematic and connector information.

Normal Operation and Fault Conditions

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

Possible Sources

Fuse
Wiring, terminals or connectors
Stoplamp switch

Visual Inspection and Diagnostic Pre-checks

Verify CJB fuse 18 (10A) is OK.

PINPOINT TEST A : ALL THE STOPLAMPS ARE INOPERATIVE

A1 CHECK THE STOPLAMP SWITCH VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: Stoplamp Switch C2314.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2314-1		Ground

Is the voltage greater than 11 volts?

Yes

GO to A2

No	VERIFY CJB fuse 18 (10A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagram manual to identify the possible causes of the circuit short.

A2 BYPASS THE STOPLAMP SWITCH

Connect a fused jumper wire:

Positive Lead	Measurement / Action	Negative Lead
C2314-1		C2314-2

Ignition ON.

Do the stoplamps illuminate?

Yes

REMOVE the jumper wire. INSTALL a new stoplamp switch.
REFER to: Stoplamp Switch (417-01 Exterior Lighting, Removal and Installation).

No	REMOVE the jumper wire. REPAIR the stoplamp switch output circuit for an open.

One Or More Stoplamps Are Inoperative

Refer to Wiring Diagrams Cell 90 for schematic and connector information.

Normal Operation and Fault Conditions

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

Possible Sources

Wiring, terminals or connectors
Bulb
High mounted stoplamp

PINPOINT TEST B : ONE OR MORE STOPLAMPS ARE INOPERATIVE

B1 IDENTIFY THE INOPERATIVE STOPLAMP

Ignition ON.

Apply the brake pedal and observe the stoplamps.

Are all the stoplamps inoperative?

Yes

GO to Pinpoint Test A

No	For the high mounted stoplamp, GO to B2 For a rear stoplamp, GO to B4

B2 CHECK FOR VOLTAGE TO THE HIGH MOUNTED STOPLAMP

Ignition OFF.

Disconnect: High Mounted Stoplamp C904 (4-door vehicles).

Disconnect: High Mounted Stoplamp C9040 (5-door vehicles).

Ignition ON.

While applying the brake pedal, measure:

4-Door Vehicles

Positive Lead	Measurement / Action	Negative Lead
C904-1		Ground

5-Door Vehicles

Positive Lead	Measurement / Action	Negative Lead
C9040-1		Ground

Is the voltage greater than 11 volts?

Yes

GO to B3

No	REPAIR the high mounted stoplamp supply circuit for an open.

B3 CHECK THE HIGH MOUNTED STOPLAMP GROUND CIRCUIT FOR AN OPEN

While applying the brake pedal, measure:

4-Door Vehicles

Positive Lead	Measurement / Action	Negative Lead
C904-1		C904-2

5-Door Vehicles

Positive Lead	Measurement / Action	Negative Lead
C9040-1		C9040-2

Is the voltage greater than 11 volts?

Yes

INSTALL a new high mounted stoplamp.
REFER to: High Mounted Stoplamp (417-01 Exterior Lighting, Removal and Installation).

No	REPAIR the circuit.

B4 CHECK FOR VOLTAGE TO THE REAR LAMP ASSEMBLY

Ignition OFF.

Disconnect: Inoperative 4-Door LH Rear Lamp C412 or RH Rear Lamp C415.

Disconnect: Inoperative 5-Door LH Rear Lamp C414 or RH Rear Lamp C417.

Ignition ON.

While applying the brake pedal, measure:

4-Door LH Rear Lamp

Positive Lead	Measurement / Action	Negative Lead
C412-1		Ground

4-Door RH Rear Lamp

Positive Lead	Measurement / Action	Negative Lead
C415-1		Ground

5-Door LH Rear Lamp

Positive Lead	Measurement / Action	Negative Lead
C414-1		Ground

5-Door RH Rear Lamp

Positive Lead	Measurement / Action	Negative Lead
C417-1		Ground

Is the voltage greater than 11 volts?

Yes

GO to B5

No	REPAIR the stoplamp supply circuit for an open.

B5 CHECK THE REAR STOPLAMP GROUND CIRCUIT FOR AN OPEN

While applying the brake pedal, measure:

4-Door LH Rear Lamp

Positive Lead	Measurement / Action	Negative Lead
C412-1		C412-4

4-Door RH Rear Lamp

Positive Lead	Measurement / Action	Negative Lead
C415-1		C415-4

5-Door LH Rear Lamp

Positive Lead	Measurement / Action	Negative Lead
C414-1		C414-6

5-Door RH Rear Lamp

Positive Lead	Measurement / Action	Negative Lead
C417-1		C417-6

Is the voltage greater than 11 volts?

Yes

For 4-door vehicles, INSTALL a new bulb.
For 5-door vehicles, VERIFY the bulb is OK. If OK, REPAIR or INSTALL a new rear lamp jumper harness. If not OK, INSTALL a new bulb.

No	REPAIR the circuit.

The Stoplamps Are On Continuously

Refer to Wiring Diagrams Cell 90 for schematic and connector information.

Normal Operation and Fault Conditions

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

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C1A96:24	Brake Light Switch: Signal Stuck High	An on-demand DTC that sets when the BCM detects voltage on the stoplamp switch input during the BCM self-test.

Possible Sources

Wiring, terminals or connectors
Stoplamp switch
PCM

PINPOINT TEST C : THE STOPLAMPS ARE ON CONTINUOUSLY

C1 CHECK THE STOPLAMP SWITCH

Ignition OFF.

Disconnect: Stoplamp Switch C2314.

Ignition ON.

Do the stoplamps continue to illuminate?

Yes

GO to C2

No	INSTALL a new stoplamp switch. REFER to: Stoplamp Switch (417-01 Exterior Lighting, Removal and Installation).

C2 CHECK THE PCM (POWERTRAIN CONTROL MODULE)

Ignition OFF.

Disconnect: PCM C175B (1.6L TIVCT).

Disconnect: PCM C1915B (1.6L EcoBoost).

Ignition ON.

Do the stoplamps continue to illuminate?

Yes

REPAIR the stoplamp switch output circuit for a short to voltage.

GO to C3

C3 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

Disconnect and inspect all PCM 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 PCM 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 for any applicable Technical Service Bulletins (TSBs). If a exists for this concern, DISCONTINUE this test and FOLLOW instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new .

REFER to: Powertrain Control Module (PCM) (303-14A Electronic Engine Controls - 1.6L Duratec-16V Ti-VCT (88kW/120PS) - Sigma, Removal and Installation).

REFER to: Powertrain Control Module (PCM) (303-14B Electronic Engine Controls - 1.6L EcoBoost (132kW/180PS) - Sigma, Removal and Installation).

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.