Originally Posted by marshall834
I think I hear that pump every time you open a door, unlock your doors, correct? Small humming sound.
I'm not so sure I've ever heard the exhaust flap closing. I'll have to pay attention to that.
Regardless, good info, thanks!
Yup when you open the door you can hear it. Mine has failed a few months back I will get around to repacing it, after I found out its function I just set my JB4 to autoclear the code it would set off and Ill worry about it when I have the time to care.