Took a couple pictures for you, left and right hinge, ...
You may notice that opposite to the right, left one has a black plastic cover concealing the wire harness connecting body wiring to the lid wiring. There are wires for reverse lights, rear fog lamps, license lamps, interior trunk lights and trunk power lock. You talked about taped wires, so if your car doe not look like the pictures, then guess somebody did repair the hinge harness before.
As you are not blowing fuse F5 and your description said interior signals lights and license and parking lights are out, being them controlled by different contacts in the light switch (making circuits independent after light switch), bet your problem is before light switch.
Javier
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