Thakns for all the helpful replys!!!

well ive just nipped out to the garage n check/rechecked all the earths, All seam fine so moved on to a jump lead direct from the alternater to the battery as suggested by rich!

And problem solved ish ha!!

on idle im getting 14.0v at the ecu!! with lights on 13.7 and lights + fans on 13.4!!

i cant see what happens under load but i think its safe to say that due to me being a twat not running a heat shield had cooked the charge wire!!!!!

I will say though im thinking of haveing the alternator refurbished as well just for the belts and braces approach!!!

chees jay