Getting my stock nav/THX HU replaced with an AVIC Z110BT. Had ordered a harness from Crutchfield (their app guide said it would work for the LS with navi) - part #120705520.
Unfortunately, the installer says that it doesn't fit if one wants to retain the use of the factory amps and can't find one that does.
Does anyone have any ideas?

Many TIA!

*Bump*

I don't know of any adapter harness that will work [if you had factory nav]. You can still do it, you will just need to splice into the LS's wiring. There was a topic on here about it before where someone posted the wiring information needed to do this. Search for it.

I don't know of any adapter harness that will work [if you had factory nav]. You can still do it, you will just need to splice into the LS's wiring. There was a topic on here about it before where someone posted the wiring information needed to do this. Search for it.
Hmm... I like to think that I did a pretty thorough search of LVC back when I was researching this, but no harm in looking again :)

Thanks!

Try contacting LsUnV2

http://www.lincolnvscadillac.com/showthread.php?t=50325&highlight=nav%2A+wiring

Try contacting LsUnV2
http://www.lincolnvscadillac.com/showthread.php?t=50325&highlight=nav%2A+wiring
Sweetness! I was hunting around for this thread. I did talk to LsUnV2 (kinda hate to bother him since he's busy) and he sent me the scaled down diagram.