My 2005 HR Endeavor is leaking air, about 6o lbs over a 4 hour period. I have tried soapy water on everything that looked like a air valve or air hose with no luck. Took it to a mechanic and he tried...
You have two hose connections behind the dash that connect to your air gauge and a couple of connections to the parking brake. These are under the kick panel by your left leg while seated in the driver's seat.