Power Window Wiring Help

[running-snail]

It was a warm day in Michigan today. Went shopping, while on the way to the store we put some of the windows down. Passenger front and rear would go down but not up - unless you opened the door!

I've searched and searched. I'm convinced this is a wire short in the pillar - black tubing issue. I've seen several comments like: replace wire; put in new wire, etc.

That's great, but exactly where do you splice the wire? Where does the wire go once in the pillar - to the floor? What has to be removed to splice in a new piece of wire? What size wire was used? Solder & shrink?

Sorry to be so inquisitive - I'm far from comfortable working with electrical issues.

Thanks.