Originally Posted by HarryG
Is it possible that the circuit powers only two lights? If so, how can I pinpoint which is bad and is pulling new wires a logical option?
On a 15amp circuit it's highly unlikely that it's only those two lights. Not impossible.. all kinds of squirrely wiring isn't uncommon, but probably not. I would be checking vent fans, fridge, WH, water pump, detectors, awning, tank heaters, slides, and any other 12v devices for current.
More than likely the short is in an actual device or fixture, but it's possible it could be a worn wire shorting. I wouldn't start pulling new wire until the problem has been isolated.
One culprit many don't think about is your WH's relays. If your electric element was fried at one time, it's not uncommon for the thermostat relay to fry as well.
I hope it turns out to be a simple fix for you.