Yahoo Message Number: 13980 (http://groups.yahoo.com/neo/groups/Country-Coach-Owners/conversations/messages/13980)
The air switches for the parking brake/slide interlocks are in the front left compartment of the coach. (the one under the driver) The coaches I have come across have three in a row. Inside the compartment, look to the left and you should see them...wiring on your side, 1/4" air line on front side.
Symptoms of a bad switch or switches??? Unable to level coach with engine running and parking brake applied. No telltale light lit on dashboard for parking brake or low air pressure. Unable to extend or retract a slide.
Permanent fix?? Replace all three switches with the new style "two tab" switch. The new style is an exact replacement for the old. The difference is that you have to add a ground wire to the second tab on the switch. The old style uses the switch case as ground. You may get lucky and just back off the mounting nuts and clean the metal where the star washers are and get your ground back. I have replaced all three switches on numerous coaches.
Fred Sage '01 Magna #5983