If the wire is too tight to the wall to make that easy you have a second option.
Running wires in insulated ceiling no attic.
Worst can you open the ceiling 5 inches from the wall and work from there.
Locate the wall studs with a stud finder in the area where you re snaking your wires.
2 place the electrical box that will contain the wiring for the device being installed against the wall where.
There are two ways to insulate around wires.
Tear the sheet across the width instead of tearing it lengthwise.
A 3 inch strip of drywall is enough to run receptacles around a room.
On a single story home or the the upper floor of a multiple story home this means accessing your attic to run wire.
First you can tear or cut the insulation sheets in half and lay half behind the wire and half in front.
Running electric across a ceiling sometimes requires you to enter into the attic but if you are lucky enough you may just be able to run the cable across the ceiling without setting foot in insulation.
Here is how to fish wire through a ceiling.
For vertical work you can cut about 6 inches below the wall ceiling joint drill through the top plat and then fish from the opening ion the ceiling.
New lighting cable computer networking and sound systems can all require wiring that may need to come through the ceiling.