I agree, here are a few more hints. The vacuum lines that control the "unlock" function are yellow with a green stripe. The yellow/red lines control the lock position. The yellow/green lines start in the drivers door and go to the other door locks. They travel under the front floor matts within black plastic "covers." The easiest way to test the system is to use the "Mityvac" to check the various portions of the system at the rubber tees located in these lines. When you find the section that will not hold a vacuum, you have found the leak. Do a search on vacuum leak and you will find lots of info.