I just rec'd a Dual XD 7600, and after I installed it (in my 04 LX) I encountered several problems:

Door locks do not work when key is in off or in accessory position.
HU does not work with key in any position
DC is being supplied to the HU for constant power, but not for switched power.
Ground is connected

This poster:
I Killed My Element (http://www.elementownersclub.com/forums/showthread.php?t=10918&page=1&pp=10&highlight=killed) had similar problems, but his fix (fuse #9) does nothing. My fuse #9 shows continuity, and a replacement did not change the situation

Could I have :evil: a relay involved with that same portion of the circuit?

Any help would be greatly appreciated.

Repaired. Wrong fuse number nine. It looks like I spent all that time under my steering wheel for nothing.

hey maybe it wasnt' for nothing? post some pics of your new HU!