Don't these cars have a button or knob inside to manually lock/unlock the doors?
Each door has an emergency pull-lever on the floor.
This lever does more than unlock
the door. Pulling it manually opens
This design is necessary because the C6 doors are normally activated electrically.
Touchpad outside, pushbutton inside -- but obviously they don't work if the battery's dead.
Ironically, if you're locked-out
with a dead battery, this "keyless" system uses an old-fashioned metal key to get in.
The system also integrates with keyless start
... ridiculously complicated for a minor convenience. Known problems too... some are expensive not DIY (for example google "RCDLR").
I mention all this because, sadly, all 2015+ Mustangs have keyless entry and
Just another reason I'm keeping my '66 FB.
'66 Fastback 289 C-code auto, older restoration, sold
'03 Mach 1 manual, bought new, sold
'79 Notchback 5.0 auto, bought new, sold long ago
Favorite mod: '07 Mustang seats in my '66 Fastback