Short in running lights

I found the issue with the spoiler and 3 lights above the rear window -- For those who might have the same issue: I went under the R-pod where the green wire (running lights power from the truck) exits the 7-prong cable and goes into bundles of green and green/white wires. There is a convenient wire jumper between two bundles. I cut the jumper and using an ohm meter I tested wires in the bundles for a short (0 ohms) I found that the front and wheel running lights were good/working. But the wire to the rear had 0 ohms when testing between the green wire and ground. I followed the green wire in the green, red, brown wire group to the rear of the trailer. In the corner past the heater, I found another junction/bundle of green and green/white wires. By testing each wire, I found one green/white wire was the issue and when I cut / separated it, all the running lights on the sides and in the rear lights returned to working. 

My short is in the green/white wire circuit which appears powers the 3 running lights in the air spoiler which are not on when all other running lights are. 

Now this where I need help. I traced the green/white wire across the floor and behind the converter where I lost it. The air spoiler is well caulked and screwed into the body. I'm not sure if I take things a part I can fix the issue and not sure if replacing the spoiler is worth the effort. Anyone have this running light problem in the air spoiler and solved it?

Thanks! Bob