In fall 2010, my wife fell in love with a 2004 XC90 and we had to get it. It was a huge step up from the '01 Civic she had at the time and, since I've always had good luck with Volvos, I saw no problem with it. It had a full dealer maintenance history and had around 85k miles. Unfortunately, I didn'...

Perhaps leaking flex down pipe

check power and Gnd to the amp. Under the right front seat. there is an inline connector about 8-10 inches from the amp.
moisture can damage the pins.