It's a bit difficult to imagine that a dash-cam lead (a USB lead, I assume) could totally disable the car. Even if you pulled on it hard enough to damage the USB port, that shouldn't stop the engine ...

When you are heading out in your car it can be frustrating to find it won't start. Whether you are in a hurry or popping out hearing the engine turn over but going nowhere can be more than irritating.

If you mean that the engine refuses to be turned over either by the starter motor or by physically pushing the vehicle in gear and then letting out the clutch, then there’s potentially something ...