Many of you here have old Birds that are in great shape, others like myself just have old cars with questionable old wiring.
Who leaves their car in the garage with the battery hooked up all the time?
I worry about my Convertible, several things don't work and I'm not sure why yet. A short and fire would be devastating so I usually leave it unhooked since it only gets driven on occasion.

So far the list is;
No turn signals front or rear.
No front parking lights.
No dash lights.
No curtesy lights.
No Radio. AM so who cares but...

Fuses are fine, all grounds are in place. I did get the headlights, tail lights and brake lights working. The wiring is original and uncut, I plan on pulling the headlight switch and checking it.
Front parking lights I'm sure need some serious socket cleaning to start.
Still not sure about leaving the battery hooked up though.