1995 Buick Regal with door and turn signal problem.

Question edited for clarity.
Question moved to model category.

Something has become disconnected from the outside handle.

https://www.google.com/search?q=1992+Buick+Regal.+passenger+door+not+opening+from+the+outside

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If 2 door coupe handle on back side of door..they r known to break..if old style look under handle u will c 2 metal if broke only replace handle

Don't know if this is aplicable , but I just had this problem with a 2002 dodge . it was ice build up on the bottom of the door .

Broken exterior handles

remove the door trim and you will see nuts inside the door skin that holds the handle assembly on.

either both outside door handles are broken or door handle linkages are loose. remove door panel for visual inspection and verify

I have this problem every year with my car, 1993 buick regal custom, 3.8. What happens is it gets cold, warms up a bit, and ice or snow melts and gets in the door, then it gets cold again and it freezes. I go to unlock and open the door from the outside and this problem arises.

There is a vertical rod on the left side of the drivers side, right side of the passenger side, that gets bent, from trying to open the door when that mechanism is frozen up. Just bend it back, a TINY bit and it will start working.

I got tired of taking my door apart every time it happened so i cut a little "door" in the cover thing, so i can get at that bar.

I also tried coating it in grease and that seems to lessen the frequency.

R/F door trim will have to be removed. Most likely you will find linkage disconnected from the inside latch of the outside door handle. You might even find a broken piece of the door handle requiring replacement

If the handle itself is loose it has become disdonnected youll have to remove the door panel to repair.

there is a linkage rod held by plastic clips that runs from the door handle to the door latch, it has come off, u must detrim the door to replace it.