Wire is routed to all the things I mentioned in post #7 with nothing in the circuit but a couple of connectors.
From the PDC it goes direct to the blue connector, in the block of connectors near your driver side dash speaker. From there the wire is tapped that takes it back out to the under hood lamp. If you have an under hood lamp does it have voltage at the pink/white wire? If you don't have an underhood lamp there should be a two pin connector at the end of a length of wire somewhere near the center of the firewall. If you have no power there the wire is likely to be broken somewhere between the PDC and the blue connector and that would be the length of wire you would need to replace.
From the blue connector, it goes to the green connector in the same group of connectors, and from there to the under dash lamp connectors, radio and cluster.
If you check for continuity from the blue connector to the cluster connector and have a good circuit, it means the wire is good all the way from the blue connector, via the green connector to the cluster, and there will be no need to run wire directly to the cluster.