FOUND IT - FOUND IT! Bastards…..
Thought I’d just jury rig a wire to the stray yellow floating about under the xMember-BINGO!
I’m guessing a break in the loom somewhere and this was a fly lead bodge - but chopped off before I got it, so never had a full compliment of lights on the back until18:06 on 13/9/21!
Will now tidy it up and have a brew…..
Best to use one of the heat shrink crimp connectors as they are waterproof.