Dash,lights etc not working

I have searched and read so many posts and tried everything suggested. To start with I have re eathed the brown/white wire to the rear stud of rocker cover I have also tried disconnecting it at the little red connecter near fuse box and ran a different earth and that hasn’t worked. I have also tapped into the earth (pin 2 ) on the back of clocks and tried earthing to body with no joy.

Any way this is what’s happening so any help will be good. I have battery light and oil pressure light come on, rev counter sits at 3k without engine running, MFA screen works, NO dipped beam but have side lights, Full beam only works if you pull and hold stalk in place. Hazard lights work.

The strange thing is everything worked before I Took it out of the doner car but now I have put it all in the caddy along with matching engine it’s all stopped working


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