Door won't unlock/open

[fixkick]

i forgot to ask, at the doors , locks, electric? as seen on some 4doors? my guess not. but???

ok, that device, does 2 things.
one is a latch it unlatces, or latches, closing the door it latches automatically
the the top lever, unlatches it.
the bottom levers there are locks.
the conundrum here is, (is the lock stuck or just the latch) if one lever stuck, then that is it.



the only way to cure this is to get the top levers to work, try penetrating oil?
my guess is this car is in the rust belt? (wiki that)

and it's all rusted up?
i cant see it to access what's up there.
but only a direct attack on that lock/latch mechanism works.
id first us a powerful light there to see whats up. and then see if both lever on the device are free to move, if one is stuck that I attack that, first with PEN oil, penetrating oil.

RUST is a PROBLEM here; if see Here: (can be tedious)
like i said i cant see it, seeing is EVERYTHING
if I saw , massive rust, i'd attack it with my bottle of Phosphoric acid (its sold as brick etching liquid) this eats rust and coverts it.
then flush that out in 1hr later with water. then hot air blow it dry, with a heat gun.
i then attack it with this, "liquid wrench" never WD40( its for other things)

https://www.walmart.com/ip/LIQUID-WRENCH...l/47347629


here is the part, in the real.