How to bench test my electrical wiring - Request

What are you testing? Harness, components...?

Before I begin, you should know that the car is disassembled. The wiring has all been removed, but I haven't unplugged any of its connections. For example, the wiring under the hood is all still in one, long "rope" that all comes together in the harness.

I want to test the electrical continuity of the wires. That is, if I know that a complete circuit is operating, I want to use a test light to make sure that everything has power. My main interest is to see whether my fuel and temp gauges work on the instrument panel. I figure that, while it's out of the car, it is a good idea to check ALL the wires. Since it's a '67, that means that there aren't a whole lot of them, so it wouldn't take too much time.

Does that make sense?

Define testing, usually a ohm meter from point a to b is fine if the wires are not cracked or hard.

If possible, I'd like to use my multimeter to test just how much power is getting through all the wires.