The three original plug ins, in my garage don't work. The one on the farthest to the electric source has "protected by GFI" written on it but inside there just seems to be a switch and a plug in it but no reset button, for the life of me I can't find a GFI. The house was built in the early 70's. What should I be looking for, do they look like the way they look now or are they different?