Peter,

You are exactly right. Here's some quick instruction. Also the Haynes manual is useful for the first 3 steps.

1. Remove drivers door panel.
2. Remove Kick Plate next to emergency break and hood release.
3. Remove floor mat and floor board/pad.
4. Remove plastic panel that covers the hoses.
5. Remove 3 way lock switch.
6. One at a time, remove each hose and check it for it's ability to hold pressure with a vaccum pump. In my case, the supply hose had a leak. The leak was in the rubber boot that contains the vaccum hoses and power supply for the electric windows.

Once the leak is isolated, in my case in the rubber boot, it can be repaired with rubber repair hose. The key is to remove each end of the rubber boot, i.e. from the door and from the door panel, to ease "fishing" hoses from the door to the interior. From there it is just a matter of patience and being firm with the hoses to make sure you do not break them.

If you need more specific instructions, reply to this thread or e-mail me and I'll be glad to walk you through it.

JCD