Cheers Jim - essentially thats what has been done to check - there is a definate drop between one end of the cable the other. Something has to be wrong under the floor , but I'm hoping that it really is just a case of pulling out a couple of large wires - making up new ones & pull them back & connetn the new ones.
Anything to cause that much drop I think must be pretty obvious. Still I'm just paying someone else to do it so hey its only money
I'd rather do it this way & get it fixed & sorted now rather than on a glorious day in the summer - hopefully the instrument wiring etc can be left in sutu ( unless its all been bound together ) .
Just praying its as simple as I can see it should be - There are almost too many 'things' going on for me to be able to fix or even undertsand on a modern engine - especially an opti ! Std 4 stroke I can cope with ( just) - they are like cars really just with block turned 90' ( in my simple mind anyway)