Problems with the wiring

[Joopjbc89]

My drivers side rear door cuts in and out when you shut the door
And the passenger side front doesn’t work at all
Would it be wiring problem from the back of the head unit or directly from the speaker??
Or could it even be a fuse problem?
Help

 

[BowTie]

The wiring loom gets broken over time near the door hinges where it goes from body to door through the rubber sleeve.

Best to ignore factory speaker wiring and fit your own fresh stuff.

 

[Joopjbc89]

How to do it yourself??