About a year ago, the radio on my 2004 Honda Pilot started shorting out while driving. At the same time a thump is heard in rear of car, and the ABS or brake light flashes on in the dashboard. Then after a second or two, it goes back as if nothing has happened. Then a few seconds later it happens again. It has been happening increasingly more in the past year. My car now has 87k miles on it, and I am the original owner. I have taken it in twice with a video of the problem and the Honda people have no idea what it is.