Electrical Issue

Well I don't know what happened. I crawled around under the unit looking for an electrical box, plug, anything that looked like it had a GFCI, I couldn’t find anything. I hooked it up to shore power (plugged it into my house 110) and switched the breaker box from generator to shore. I opened all the basement compartments, turned on all the lights in all the compartments. Then I went back inside and put my voltage tester in each outlet and got a positive reading on all of them. Then I tested the two that weren’t working and I got a positive reading from them as well. Plugged in my coffee pot and it work fine. I have know idea what happened or how I fixed them but there now working. Later today I’m going to plug the heater back in and see what happens.
Do you think the lights in the compartments could have something to do with it?