Thanks for all the suggestions. I ended up cutting the corner off the connector block, and crimping and soldering a new male terminal onto the affected wire. Before re-installing the block, I put some dilectric grease on all connections.

I also think I may have figured out what happened. I noticed the male stud on the headlight switch was bent slightly rearward, so I suspect instead of the female connector fitting snugly down onto the male end, it may have missed the stud, and slid down in front of it instead(?). Hopefully, this will take care of it.

Roger