[Brown Bird]

Man I wished you would have caught me before I buttoned up mine but
The check valve holds vacuum in the system and the other vacuum switch
Changes normal heat and A/C to vent I hope that helps Eric

 

[Brown Bird]

Let me look in the assembly manual I think there is a good diagram in there and here is one that is very similar to the 69

 

[Brown Bird]

Also if you flip the vacuum switch with two lines attached from norm to vent it turns off the water flow.

 

[Brown Bird]

I have a couple diagrams and I may be able to stick my inspection camera up in there and find out the colored connections

On this one there is a color code in the upper left hand ledger

 

[Brown Bird]

One is the vacuum supply the other 3 are outputs and i cant get the camera up in there to see sorry

 

[Brown Bird]

Eric here are some pictures of mine when it was torn apart You might be able to get something out of it

 

[Brown Bird]

Those are the best i can find if you down load and view them with windows picture viewer you can zoom in on them
And here is a picture of the check valve it goes in the engine compartment

 

[Brown Bird]

I found some more pictures

The check valve is the vacuum source line the other line goes to the water control valve

 

[Brown Bird]

Did you get the pictures Eric they were sent

 

[Brown Bird]

You might have a bad vacuum actuator can or a leak in the control switch