Pinpoint Test A : No Power In All Ignition Switch Positions (Vehicles With A Conventional Ignition Switch)

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

A1 CHECK THE VEHICLE BATTERY

Carry out the Battery Condition Test. REFER to Battery, Mounting and Cables .

Is the battery OK?

Yes	GO to A2.
No	DIAGNOSE the battery condition. REFER to Battery, Mounting and Cables .

A2 CHECK FOR VOLTAGE TO THE IGNITION SWITCH

Ignition OFF.

Disconnect: Ignition Switch C250 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
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 28 (15A) is OK. If OK, GO to A3. If not OK, REFER to the OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

A3 CHECK THE IGNITION SWITCH VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Disconnect: BCM C2280A .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C250-4	Courtesy of FORD MOTOR COMPANY	C2280A-6

Is the resistance less than 3 ohms?

Yes	GO to A4.
No	REPAIR the circuit.

A4 CHECK FOR CORRECT BCM 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. 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 TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, Refer to BCM Hardware Testing ..
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.