So my BIL came to borrow my trailer and seems the last person to borrow it did some damage. All I can assume is that they hit a bump hard and the axle has bounced up and somehow severed the trailer wiring...
Seems that when my BIL went to hook it up it was shorting out and blew his fuse. I ended up reconnecting the wires with these crappy plastic things, but for some reason they always pull out.
I ended up twisting them together, then taping up everyone individualy and lastly taping the whole group together. Then cause I have so much extra wire I was able to pull extra wire out and redirect it away from the axle and onto the base of the timber floor :)
Now works a treat. Can't wait for the new wiring to arrive for my camper trailer!! :D