I hear you Renegade. In fact I have done exactly that with my in series wiring harness. I now colour code them with a Sharpie (don't know what the Aussie version is but it is a waterproof felt pen)and use every colour except black or red. Purple to purple, green to green.......well, you get the idea. After the first debacle I have not had a problem!!

Live and learn

Cheers mate

MJ