Moved into our house 4 years ago. None of the outlets/lights that are currently not working ever worked from day 1. 4 outlets and 2 front porch lights do not work. My outlet plug checking tool has no readings from any of the outlets. They seem to be all in a line or "on the same circuit or whatever. There is a gfci immediately after one of the final outlets that does not work. I have taken it (and the wires behind it in wire nuts) apart and the connections seem quality. The gfic outlet works just fine. There are 2 more gfci outlets within "earshot" of the down outlets. They don't seem to be "in line" with the other downed plugs. I have pulled out each plug that is not working and reattached the ALUMINUM wires to the screw in attachments. They all seem like good connections. HELP!
If no breaker is tripped and all gfci outlets are ok, then it is likely that these outlets and fixtures are fed from another outlet or fixture and the connection there is problematic.
It sounds as if you have little experience with wiring, and aluminum wiring poses a special set of issues. Connections between aluminum wiring and copper based devices often are problematic unless special techniques are used to ensure good permanent connections.
This sounds like a project for a professional electrician to trace the break in the circuit and ensure that all aluminum connections are sound and safe.
Aluminum wire is horrible I agree. One the first 3 houses I wired after getting my license in the 70's had a fire in the wall less than a year later. The special knowledge others are referring to is bunk. All it takes is a little de-ox or noalox oxide inhibitor on the connections. I only use aluminum for feeders or services now and very rarely. Since you have aluminum lets try and help you find the problem. You checked all the dead outlets so we can believe they are good, now go back to the first working from your drawing top left GFCI Or middle right. (I would pick the one closest to the breaker box because that is the normal feed direction). With the power off pull that one many times the failure is from a broken feed from a working outlet (if not that one try the other). I cannot read the note in the middle. With more information maybe we can give you another thing to try but this is where I find many problems with dead outlets copper or aluminum. A small bottle of oxide inhibitor would be a good investment only a few dollars. Any time you make a connection with a wire nut or screw terminal put a drop of inhibitor on the wire just enough to coat the wire. never use the "stab" or push in connectors with aluminum and use outlets that are rated CU/AL many outlets are only listed for copper.