Hey Big Jim,

Good thoughts on that tail light housing for the sedan.

I saw OP also started a thread with the same post on TB, and another TBer asked the same question I did: wagon or sedan. He got an answer, but no one followed up. It's a sedan.

For others who land here by virtue of the thumbs count, the trouble she has is clearly with the usual poor connections in the trunk, just where you pointed out. Instead of a new circuit board, she could invest $3 in a test light and given a little help, such as to know the wire is blue, find exactly where the trouble is.

If it were a wagon, there's an additional vulnerability in the wiring as it crosses from left to right above the bumper, as rust and rot is common there, but much less in the way of getting the power from the wire to the bulb.

The rapid flashing clue is important. The flashers (all of them now) have a built-in diagnostic ability to sense when the load is wrong, such as a bulb out,
indicating this by the 2x flash rate. That's the clue pinpointing the trouble to the rear lamp, although I suppose it never hurts to disassemble the steering column housing and have a look at the switch and its wiring. Things get loose up there.
--
Art Benstein near Baltimore

The journey of a thousand miles begins with a broken fan belt and leaky tire.