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Hello my name isXXXXX will be glad to assist you. In most newer homes the garage outlets are required to be gfci protected, these outlets will have a test and reset button on them. I would check these first to see if any are tripped and need to be rest. If this is not the case we will continue, and you will need a mulitmeter/voltage tester.
Also you may find the gfci outlet in the garage, if not it may be outside, in basement/crawlspace, an near by room,