I have read several posts in this section about Amplifiers mounted to the underside of the rear deck for the 2 small subs in that deck. My 04 S-type has a CD-Changer in the trunk and mounted directly above that changer appears to be a small amp. Is this amp the sub amp in an 04? If so, can someone shoot me a link or file that would describe the wiring such that a body might tap into the Lo Level inputs to feed an auxiliary sub setup? If this is not the sub amp perhaps some info about the wiring into the actual sub amp that could help me out. Much appreciated.

 

The diagrams are in jtis. About $10 from ebay

 

I think JTIS only goes to 2003. Anyone got this same setup on an 03? That would validate JTIS for my 04 in this instance.