Troubleshooting why 3 Garage outlets have stopped working: GFCI
The National Electric Code, these days, says garage receptacles are supposed to be protected by GFCI [NEC 210.8 (A)(2)]. That could be a GFCI outlet that is in the garage, or it could be a GFCI breaker in the panel. Anyway, if code was followed, that is. The branch circuit supplying the outlet in the garage is not supposed to supply outlets outside of the garage [NEC 210.52(G)(1)], but who knows, your garage could be tied to a GFCI outlet in another part of the house. Not very likely, but possibly. First, I would try checking to see if there is a GFCI receptacle in the garage. If there is, then make sure that it is reset. If it is a new GFCI outlet, then it may have something called Smart Lock, which means that you have to go back to the panel and turn the branch circuit off for about a minute, then turn it back on, then go out and reset the GFCI. My best guess, is that your problem has to do with a GFCI device that has tripped. It may be an outdoor receptacle that is causing this, even though there is not supposed to be outlets on that same branch circuit that are outside the garage.