Re: Electrical wiring in garage
Hardly enough information to venture a guess. Was the breaker double pole? Did you check the wires for power before they were connected to a receptacle?
It's possible it was for a 220 outlet, one set of wires may be a switch loop, you could have an open on the neutral, there may have been a split outlet with one half controlled by a switch.
I would suggest you first check each cable for power, try to see where they are coming from or going to.
Be sure you live your life, because you are a long time dead.-Scottish Proverb