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This vehicle uses a coil over plug ignition system. As with any ford vehicles with this design the coils break down with high mileage and when wet. this causes the engine to misfire and if bad enough would cause the engine to stall. If you can get the vehicle scanned for trouble codes(they will be in history if not cleared) we will know for sure what the issue was.
let me know how many miles and what the codes are.
yes, if the wires are frayed and the wires touch and short out it could cause stalling. If you can get the codes it will help in diagnosis. Many parts stores will scan for free.
If you would have gotten the trouble codes I could have helped much more. Like I said many parts stores will scan for free. I use an APP from google play(torque pro) on my phone and it works with a OBD2 Bluetooth adapter(e-bay)
I have a Samsung s7 . Cost is under 30$ for the APP and adapter. pulls codes, live data and clears codes.