[djimellis]

Just a slight adjustment to the diagram and description Richard provided that applies to my 93 coach. The supply air comes from the supply tank, then goes into the top center of the 6 pack, the supply to the HCV(s) comes out the center bottom of the 6 pack and then the HCV modulated air comes back to the end of the 6 pack opposite the end the 2 lines going to the bags are connected to.

Forest taught me that touching a piece of steel to the top posts of the solenoids will tell you which one(s) are activated at any given time. You can use that technique to verify how yours are set up.

Thanx for that. Will try that today.

[Richard]

Thanks Jon,

We were wondering where and / or why there was a branch off the supply line in the middle of the diagram. I omitted it because we were not sure of it's purpose, destination, or origin. It makes perfect sense now.