Pinpoint Test D: No Power In Start

WARNING: This page is about a different car, the 2013 Ford Mustang. 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 multimeter probes.

NOTE: Verify that battery voltage is greater than 10 volts.

D1 CHECK THE IGNITION SWITCH
- Carry out the IGNITION SWITCH . Refer to appropriate OEM WIRING COMPONENT TESTING for component testing .
- Is the ignition switch OK?
- Yes : 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
- Disconnect: SJB C2280B.
- Measure the resistance between ignition switch C250-7, circuit CDC35 (BU/WH), harness side and SJB C2280B-32, circuit CDC35 (BU/WH), harness side.
  
  Fig 1: Measuring Resistance Between Ignition Switch C250-7, Circuit CDC35 (BU/WH) And SJB C2280B-32
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to D3.
- No : REPAIR circuit CDC35 (BU/WH). TEST the system for normal operation.
D3 CHECK THE START CIRCUIT FOR A SHORT TO GROUND
- Measure the resistance between ignition switch C250-7, circuit CDC35 (BU/WH), harness side and ground.
  
  Fig 2: Measuring Resistance Between Ignition Switch C250-7, Circuit CDC35 (BU/WH) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10, 000 ohms?
- Yes : REFER to STARTING SYSTEM to diagnose the starting system.
- No : REPAIR circuit CDC35 (BU/WH). TEST the system for normal operation.