R31 Wiring Adapter/loom?

[GXE23]

G'day all,
Was going to tackle my stereo system today consisting of Door speakers, Rear Amped 6x9's, Sub, Headunit & Amp.
After learning earlier today that I'm going to HAVE to re-wire my door-speakers, this has set me back a little as I need to get 14g speaker cable.
I feel completely stupid asking this, and I'm certain I've just over-thought on it and have ended up questioning what I think is correct:
I can remove the adapter that's clicked into the stock unit pictured here: (As it holds no use as when I removed the stereo, it's been replaced with one from a wreckers due to writing on the parts in marker etc etc.)



I've done stereo installs on ALL my cars but have never come across this, as every stereo I've removed/replaced has always been factory standard.
So I plan to re-wire it to the new loom on the Pioneer DEH Headunit going in, as this is how I best know about doing installs.
It's safe to cut as close to the stock adapter/harness pictured here, and go about wiring these wires to the new harness that came with my Pioneer headunit?:




FINALLY
Can anyone tell me which colour is ACCESSORIES/BATTERY/ILLUMINATION on a 1989 R31 GXE Skyline, or supply a Stereo Wiring Diagram for one? As I've searched almost ALL day even thoroughly, through sticky threads with little to no luck.

Thanks in advance.

[r31slpr]

I can remove the adapter that's clicked into the stock unit pictured here: (As it holds no use as when I removed the stereo, it's been replaced with one from a wreckers due to writing on the parts in marker etc etc.)

I don't really understand that question, yes you can unplug it, if you mean will it affect anything, then no it wont.

You don't have to cut into the harness, most auto stores will have a narva 8 pin connector that will fit it, so you can use the standard power and grounds.

Since your only doing the front speakers from the head unit you can also unpin the standard speaker wires and put your new ones in using the pins that came with the connector( there should be a male and female connector in the same pack). It shall look nice and standardish.

I cant remember which wires are which off the top of my head and my car is about 500kms away so I can't check.

But i deduce from your picture that perhaps the two pins on the far right top and bottom are grounds and the one on the top left is a power source of some sort, i'll guess constant because it appears to have a fuse in it.

You should invest in a multimeter (if you don't have one already), a gregorys manual and check out r31skylineclub.com

[niZmO_Man]

Get a test light or multimeter, find battery and accessory wires (I forgot the colours but I think orange/black stripe is one of them), run the rest.

[Chris Rogers]

Local R31s are common negative . Best to run fresh wires in you case for the speakers.

HR31 is the early Nissan plug and diversity antenna.

[Chris Rogers]

Also recycle the bracket you have.