Uhm. Look at the video? The ship is literally going backwards. They don’t like, DRIVE it into the bridge going the wrong way.
Mechanical/power failure apparently, and the current pulled it.
Gotta say, it doesn't feel right having this called out as a Mexican ship in the title. That's an inconsequential detail. Id rather have seen something like:
"Ship loses engine power, crashes into Brooklyn bridge, killing 2."
It lost steering power, not electrical power. Kinda like all the warning lights in your car turning on at once and the engine shutting down, even though the headlights are still on.