Finally got everything sorted today, LR condom fitted, everything dried out, dsp amp pulled, down to a previous repair to pin 8 of the larger plug failing, so did a 'better' repair using thicker bus wire than previously used, replaced the fuse and hey presto it all works, also fitted a new tailgate seal as I had a leak there too, new seal seams to have a larger seal area than older one plus rubber seems slightly thicker. Also fitted the new strut so hopefully should get a few trouble free miles