on further inspection a blue wire that goes up behind the door has snapped right where the door opens and shuts at the bottom. Looks like its meant to be encased in plastic but its all worn away, wear and tear id say.
Yes, if there’s enough slack in the harness then solder the broken ends together, reinsulate with tape and make sure you pull some slack through from the bottom so a new section is being flexed.
Alternatively cut and splice a several inches of new wire instead.
Make sure the harness is fully insulated (check other wires for cracking) and try to position the whole harness so it flexes in a different place.