I will echo what qed296 said thats probably how id do it too. An alternative way to get to the amp would be to remove the rear seat side cushions. Then you can see some screws holding the parcel shelf on. After you undo those screws you can take the whole parcel shelf out for more room to work with (after disconnecting the rear speakers). Then the amp is in plain sight. Either way you get to the amp check with a multimeter if the amps power lead gets power when you turn the radio on. If it doesnt there must be a bad connection or a break in the wire between the radio and the amp. If it does its probably the amp at fault. Let us know how it goes and good luck