I haven't had to chase down any electrical issues with the Equinox. In general, though, an errant current draw is due to an insulation breakdown somewhere in the system. Take the rear wiper motor issue you have. The motor itself is most likely the culprit there, although I have no test to offer that would confirm the theory. I would suggest pulling one fuse at a time to see if you can narrow down your search to one circuit. With the fuse removed and the current draw eliminated you have found your circuit with the trouble. What happens next depends on what is in the circuit but you will trace the circuit in search of the component causing the draw. If possible, remove components from the circuit by unplugging them to find the cause of your current draw.
I'm not familiar with the electrical systems on these machines and am interested to see how your problem goes. I see you have a thread titled, "New guy with a 2007 Poncho Torrent and a parasitic battery draw." I will be following it.