I'd try to find out from the previous owner what the actual damage was, that might help you to know where to look. If there was damage beyond just the headlight, they may have replaced a large section of wiring which would mean you need to look for a splice deeper into the body then just at the headlight itself.
The wire harness will plug into the headlight assmbly ( or it should) so the wiring inside will either be fine or factory defect. You could remove both assemblies and plug them in opposite sides of the car to see if they react the same, that would tell you for sure if the assembly was bad or the car wiring.
Oh and welcome to the forum, finally I see another Ottawa member.