LS2 T56 Backup Lights No Power

[1967ls2]

I have a 1967 Camaro with a 2005 GTO LS2 and T56 combo. About two years ago I pulled the GTO harness out and replaced it with a standalone harness from Current Performance with a simple five wire hookup. There is a backup light wire that I ran to the reverse lights. Everything worked perfectly for a while.

I took the camaro to the paint shop and it was there for about five months getting painted. I got the car back and the reverse lights weren't working anymore. I replaced the reverse light sensor in the transmission but that didn't do anything. Neither of the wires plugged into the sensor have power.



I assume that one of the wires receives power from the ecu, when you put the transmission in reverse it relays power to the other wire that then relays power to the reverse lights. My question is how to I trace where the power is back to the ecu without tearing into the harness? I assume one of the pinouts should be powering a wire running to the reverse switch?