76 280c no vacuum door ;ocks and no seatlocks
 

getting no vacuum doorlocks and no seat locks ?? is engine suppose to be running for this central lock to function ? still notice no locks even with engine running is there a vacuum pump to supply central lock system in a gas burner with a solex 4a1 carb . hook up mighty vac to the two lines on firewall pumped to 15 hg on solid yellow line went up then lost vacuum same results on the green line in picture underneath dash along dash rail with another check valve attached yellow line to mighty vac it pumped and stayed not sure if its correct main line

There is no vac pump. There is a vac chamber. These are usually located between the front left fender and the body. You might have to remove the fender to get to it but I would try removing the front left wheel and then the inner fender. You should then be able to see it right behind the wheel area, down the side of the car.

It sounds like you have a vac line that had rubbed through somewhere. As tough as this might sound you will need to tear out a bit of the interior in order to get to all the components in order to find which line has the leak.

I have never seen a cracked vac chamber, which looks like a lot of balls placed together and is usually black plastic, but in theory it could have a leak.

This will all come down to troubleshooting each area and fixing problems as they arise.

This would be a good time to replace all the rubber bellows in your vac servos. These seem tricky at first but once you get the hang of it they replace quickly.