Hello!
I have a 68 coronet, auto 727, and my reverse lights don’t work. I have the single prong neutral safety switch, replaced that and the wire to the starter relay.

Followed the reverse light wire to the bulkhead on the kick panel, and followed it from there to the firewall bulk harness. There are no wires connected to it from firewall bulkhead to the engine harness.
Checked the wiring schematic and all looks correct.

Can anyone provide assistance
Thx