Hello and thank you for using Just AnswerI'm Paul and I will help you with your Question
there is a common problem with the wires breaking in the door jam
where the harness runs from the body into the door you need to find the break in the light blue/black wire inside the door jam... this is almost always the area where the problem occurs
let me know what you find and if you need more help
the rubber should pull out of both sides the door and the body... so you can get better access to the wires... if you have to you can unplug the connectors that plug into the inside of the car and slide the wires out to get the rubber boot off.
the boot should pop off both sides to allow you to look for damaged wires
if you can get at the wires you have 2 choices
cut the boot with a razar blade and tape up when done..
or follow the wires that go into the body unplugging them from inside and pull them out the body hole then you can slide the boot over the harness