Pinpoint Test A : No Power In All Ignition Switch Positions - Conventional Ignition Switch

WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Power Distribution/BCM for schematic and connector information.
Normal Operation and Fault Conditions

REFER to: Steering Wheel and Column Electrical Components - System Operation and Component Description .

Possible Sources
- Fuse
- Wiring, terminals or connectors
- Ignition switch
- BCM
Visual Inspection and Pre-checks
- Inspect the battery and battery cables
- Inspect the BCM fuse 4 (10A)
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

A1 CHECK THE VEHICLE BATTERY
- Carry out the Battery Condition Test. REFER to: Battery .
Is the battery OK?

Yes GO to A2

No CORRECT the battery condition.

A2 CHECK FOR VOLTAGE TO THE IGNITION SWITCH

Ignition OFF.

Disconnect Ignition Switch C250.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C250-4	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	INSTALL a new ignition switch. REFER to: Ignition Switch .

No	VERIFY the BCM fuse 4 (10A) is OK. If OK, GO to A3 If not OK, REFER to OEM Electrical Wiring Diagram Introduction to identify the possible cause of the circuit short.

A3 CHECK THE IGNITION SWITCH VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Disconnect BCM C2280D.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C250-4	Courtesy of FORD MOTOR COMPANY	Refer to C2280D-24

Is the resistance less than 3 ohms?

Yes

GO to A4

No	REPAIR the circuit.

A4 CHECK FOR CORRECT 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
- pushed-out pins - install new pins as necessary

Reconnect the BCM connectors and all other previously disconnected 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 On-Line Automotive Service Information System (OASIS) for any applicable Technical Service Bulletins (TSBs). If a Technical Service Bulletin (TSB) exists for this concern, DISCONTINUE this test and FOLLOW Technical Service Bulletin (TSB) instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCM. REFER to: Body Control Module (BCM) .

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.