Sometimes when I turn my key in my Mustang’s ignition, there’s a millisecond where nothing happens. Then it starts up fine. Any idea what the problem might be? I’m afraid one day it won’t start.
Most likely cause would be the starter relay sticking. Seems like that would be the cheapest part also. It could also be an indication of a loose connection at the battery or starter. Make sure there is no corrosion around the battery connections. I have added the starting system wiring diagram to help give you a better idea of the components involved in the starting process.
Starting System Wiring Diagram 2013 Ford Mustang2013-ford-mustang-starting-circuit-1-of-1
Starting System — Starter Motor
The starting system consists of the following:
- Starter motor
- Starter motor relay (located in the Battery Junction Box (BJB) )
- Battery and battery cables
- Digital Transmission Range (TR) sensor (automatic transmission-equipped vehicles) (located in the transmission) or Clutch Pedal Position (CPP) switch (manual transmission-equipped vehicles) (located on the clutch pedal)
- Ignition switch
- PCM (located in the engine compartment, attached to the BJB )