I unplugged in the tailgate, pulled them all out of the rubber boot and the tailgate and then soldered new wires on from just inside the roof exit point to some new, and some reused plugs, threw the boot away as it was broken anyway and then taped the loom and reconnected, allso lubed wires before taping to stop them getting brittle. 1 year on I haven't had any further problems but did cut up another boot to cut down any water ingress into the tailgate. :23: