Head Unit Wiring Harness - Pic Required

[b_nolsy]

G'day team,

 

Recently bought myself a 2006 Pathy ST-L. It had a cheap aftermarket head unit installed when I bought it, and when I pulled it back to look at possibly upgrading it.... holy moly. 

 

The previous owner butchered the original wiring harness. 

 

I am in need of a few photo's of someones existing original wiring harness that plugs into the back of their original head unit (should be 3 to 4 plugs depending on the model). I am looking at returning the wiring back to normal, so I can use an aftermarket plug & play harness to connect a Kenwood head unit. 

 

I tried looking at the wiring diagram on the mechanics guide but it's all gone over my head. Work better with pictures... and colour. 

[Outlaw]

When I did my head unit I found 6 different wiring diagrams for the R51s. Rang a specialist and he said they just ended up chasing signals diwn wires to get it all correct. My wire even changed colour between the head unit and speakers. Took me over 4 hours to get it all right. This was in an St.

[Slartibartfast]

I'm all for preserving the stock harness if possible, but it sounds like that ship has sailed--and I've had trouble getting stereos back into dashboards because there wasn't room in the dash for the added bulk of an adapter harness. Given that the harness is already hacked, I'd be inclined to skip the factory plugs and adapters and just solder the plugs for the new stereo right into the harness (assuming the adapters aren't set up with modules or converter boxes or something that are required to make the thing chooch).

 

Either way, the best info I can point you to is the service manual on Nicoclub. I think the Nico FSMs are all for US-spec models, so they may well be different than what you're looking at. If you haven't hacked out all the PO's butchery yet, see if you can work out what some of the wires go do based on which wires they connect to in the stereo pigtail. The color coding on the aftermarket stereo pigtails is pretty standardized (at least on the ones I've seen), and sometimes they're even labeled right on the insulation. If your new head unit has similar features to the cheapo you're replacing, that kind of color matching might be enough to work out how to connect the new plugs. If your new unit ties into a bunch of stuff the PO's didn't (sounds like there's plenty to tie into if it's got that many plugs going on), you may still have a bunch of mystery wires to sort out, but even a partial list of what color wires in the harness went where on the head unit might help you identify the correct diagram.

Good luck!

Edited August 14, 2020 by Slartibartfast