If there's one thing I hate, its fixing wiring problems left by others. Unfortunately that was very much the theme of the day. 
It all started quite well, I had a flick through the history which even includes some old issue of a rotary owners club magazine, (and a receipt for Jimmys back in 2000! Didn't realise he'd been on the go that long) and then I decided to treat the car to a claybar, hand polish and wax. 
Sure the paintwork isn't the best, but not harming it keeping it from getting any worse. It didn't turn out too badly but if you look closely you can see it was probably a home effort. 
I am trying to work out what used to be on the rear right quarter:
Anyone have any idea?
Also a piece of trim has fallen off at some point in the last week from just behind the drivers door, very annoying. Have to try and get hold of one. 
Buoyed by this fairly rewarding job and the good weather I decided I'd stick with the theme of low hanging fruit and do a nice easy stereo install to finish off the morning. 
But first a little history, the car used to have a Hawk alarm fitted with all the gizmo's, auto window up when locking, hatch release, remote start, the works. At some point this had been removed, I guess as the car had been sat and someone lost the fob or some other similar situation. Now this had always worried me because the last thing I needed was some janky wiring or a still lurking alarm system shutting me down mid drive, probably mid overtake. 
So when I got the dash panel out for the stereo I decided to do a little wire tracing. 
One thing led to another and before I knew it I had the drivers door card off, the glovebox out, the wheel surround off, and the under driver side dash. 
After discovering an always live wire just dangling under the dash (after it tried to weld itself to the accelerator) I decided it would be prudent to disconnect the battery. 
As you can see from the photos I've got some work to do to get this all looking spiffy again. 
The doors had previously been fitted with security locks, connected to the central locking & when I got the door card off it was obvious why the normal door lock mechanism no longer worked. The solenoid appears to have been fitted to the place where the door rod would normally go. While I could definitely get them both working, I'm not sure if I should or not as it looks like an incredibly easy mechanism for a thief to defeat. 
I basically ended up delooming the entire door trying to puzzle out the wiring, some of the wires went in one colour and emerged a different one. I ended up having to cut off what felt like miles of electrical tape that had fused on. Revealing dodgy solder and janky connections. This is why you should never let anyone wire on a car unless you've seen their prior work. 
The ignition wires on our cars carry the current for most of the electrical loads, I will eventually change it so that the current goes through relays and the ignition switch wires just trigger them, but for the moment I just restored the cut wires that had been diverted for the immobiliser. 
Whoever fitted the alarm used wires of a much smaller cross section then factory, they also annoyingly cut them very close to the plug so I didn't have much room to work, however I manged to splice in some decent size wire with heat shrink butt crimps.
And all this came out the car for the trash!
After all that I started on what I was supposed to have already finished, the stereo wiring. 
There appeared to be nada original wiring left, so using a 9v battery to check locations I spliced in my speakers, found a switched 12v from a blue plug which presumably went to the old stereo, couldn't find a constant live so I wired it to the wire I mentioned earlier that was swinging about. 
I need to go back & make sure its fused correctly as I've no idea where its actually coming from. 
Did some trimming to the centre piece to allow the cage to fit, tested the stereo (it works!) and the antenna (it doesn't). 
Then fixed the window switches which had been hacked up to fit the auto close module. 
Finally I realised it was 10pm, and I hadn't stopped once, not even for a cuppa or lunch! 
Current state of play:
At some point I'll plan out some real wiring improvements but at least for the time being it should be reliable.