Touch wood

[Sweety]

I've seen much thicker speaker cable than what Nissan have used for earth cables:lol:lol My Son was having problems with 1 of his amps trying to go into safe mode when max power from it was needed & I was sure it was the factory earths at fault as they are the same size on his hyundai as my T2 so made up 2 new earth leads from some spare 4 gauge amp power cable (think that's what your using Alex) & it solved the problem plus his head lights don't pulse to the beat any more:lol:lol if you want more info on it Alex google The big 3 wire upgrade which is well know in the car audio word as bad earths or to small wire can cause all sorts of problems