Pinpoint Test D: No Power In Start

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

D1 CHECK THE IGNITION SWITCH
- Carry out the IGNITION SWITCH Component Test. Refer to appropriate "OEM Wiring Diagrams Component Testing" article for component testing.
- Is the ignition switch OK?
- Yes : REINSTALL the ignition switch and CONNECT the ignition switch connector if removed during the component test. GO to D2.
- No : INSTALL a new ignition switch. REFER to Ignition Switch . TEST the system for normal operation.
D2 CHECK THE START CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: PCM C175B.
- Disconnect: BCM C2280B.
- With the ignition switch in the START position, measure the voltage between ground and:
  - BCM C2280B-47, circuit CDC35 (BU/WH), harness side.
  - PCM C175B-16, circuit CDC35 (BU/WH), harness side.
    
    Fig 1: Measuring Voltage Between Ground And BCM C2280B-47, Circuit CDC35 (BU/WH)
    Courtesy of FORD MOTOR CO.
- Are the voltages greater than 10 volts?
- Yes : For gasoline engines, REFER to STARTING SYSTEM - GASOLINE ENGINES to diagnose the starting system.
  For diesel engines, REFER to STARTING SYSTEM - DIESEL ENGINES to diagnose the starting system.
- No : REPAIR circuit CDC35 (BU/WH). TEST the system for normal operation.