Hello, first post here.

So, somehow I managed to make my first ever project car a 1986 300zx that runs and drives and could use some love. I have never really done much on a car besides a brake pad change and oil changes, so this is a really big hurdle for me. I have been struggling to find information and maybe I just need a little guidance through this issue. I pretty much just have some cheap tools and an equally cheap multimeter. But, here is what's happening:

So far what doesn't work are the: Digital Air Control, Cigarette Lighter, Windshield Wipers, Wiper Fluid Sprayers, Horn, Compass and MPG gauges, and most of the digital dash (warning lights work so far, Power Supply repaired already, no luck there).

What does work are the: radio (aftermarket), speakers / the girl that speaks to me when the door is open, windows, most lights (interior and exterior; blinkers, brake lights, ect.), speakers, headlight motors, and most other electrical components that are needed to drive it.

So far I have:
Bought and replaced battery + battery cable connections
Checked All fuses in the fuse box behind the kick panel on driver side interior
Checked Relays for horn and wipers with relays that are known to work (will probably just replace all soon)
Repaired Digital Dash Power Supply

What I plan to check soon:
Ground connections
Fusible Links (don't really know how yet but I know where they are)

I am just unsure what all to check next. Honestly my long term goal is to just get this car inspected and drive it around for fun (Louisiana moment) so I need things like speedo and Odometer. It's fun to take around the neighborhood and such but you can only go in circles so much before you want more. Any advice here would be helpful, and I appreciate any and all of it. I knew this would be a tough task when taking it on but I've already really fallen in love with this thing.