I replaced most of the wiring harnesses in my car as they were spliced five ways to Sunday; Rear light harness, under dash, and forward light harness After buttoning everything back up, I have no power to the gauges, lights etc.
Lights? Is that both front & rear?

This is the current state of the car: Neg cable: one end grounded to the rad support (connection cleaned) and the other end of the cable to the passenger side cylinder head (connection cleaned) Positive connected to the starter. Forward light harness is also grounded to the rad support.

The standard dash is bolted to the metal frame for ground, the light bar is plugged in but not installed.
The dash frame relies upon a good ground via the 2 larger bolts down by kick panels.
The bulk head on the engine side, all connections appear to be snug?

Its not the battery as I took the battery out of my 4Runner and still nothing.
I will say I took a screwdriver and touched the started relay and it cranked?

It's probably something simple, but what can I be missing here?

What is still working? Horn, Dome, etc. Knowing what is /isn't will enable to isolate circuits involved.

Positive connected to the starter.

First question, are the harnesses new or used? and regardless of condition did you go thru the entire harnesses and check for continuity on each circuit BEFORE installation?

I hope that's not all it's hooked to. See drawing, you should also have a feed from the battery positive to the starter relay B stud, wire labeled in the drawing as A1A-10R, a red 10 ga wire.

Also attached to the B stud on the starter relays are two fusible links that go to the bulkhead connector into the passenger compartment to feed power to everything not the starter.

Solved the issue - my dumb a$$ had the middle bulkhead connector inverted (upside down) Once I flipped it around, got my power and lights back. Man I feel silly.