I fixed the broken tailgate latch on my newly acquired V70. It would open 1 out of every 15 tries and that would really suck once winter rolls around. So once I got it open, I took off the trim panel with the 4 Torx screws, and pulled the panel off (secured by plastic plugs). Looking at how the outs...

Yes! that is the same sound that I hear. Except it's constantly running, not pausing as in your video. The brake pedal is stiff (with engine off), but since the pump is not pausing, I'm guessing there might be a small leak somewhere. Thanks! Either a vacuum leak or the switch is faulty. Best sort i...