This might (hell, probably DOES) have some overlap to other engines as well - particularly the LQ engines - but I don't know for sure, so I'm just stating L92 in the title.

I'm searching like crazy for online engine harness info for my L92 swap, & this page has pics of a bunch of different connectors & what they're for. (Quite a few of them are related to the body harness though.) Not exactly the info that I'm hoping to find, but it might help someone, so I'm posting this up here...

EDIT: Found another page that's more-directly engine related, & might be helpful as well.

If I find anything else that seems to be worthwhile, I'll add it to this post/thread.

 

Mast Motorsports has a really nice ECM and wiring harness setup for these motors and they offer a cam package as well with the tune already done that will get you 530 to 540hp at the crank. That is what I will be running in my Nissan as soon as we get it installed. Talk to Shaun at Mast.

 

Yeah, I'm aware of them (thanks!), & have actually sent PMs back & forth to Shaun. Would flat-out LOVE to be able to get that setup, but I'm guessing that it'll be a couple years before I'm able to.

All I'm looking for right now is the engine wiring harness schematic/diagram so that I can get the basic engine up & running in my car...

 

This is LS2 and LS7, but I would guess it should carry over to the L92 some...
http://currentperformance.com/Connectors/LS2_LS7.html

 

I dont if you will be able to find a schematic of L92 wiring harness online. Your best bet is printing out the pinouts of the E38 ECM which is available.

 

Your link in the "EDIT" is a good find. EFI Connection does excellent quality work and is a pleasure to work with.