oops thats blown it ??

[Dinger1962]

Hi fellas been working on my electrics coupe1981 1.6 whilst fettling the earths and connectors i mistakenly put a grey live(dirty thought was black)to an earth block never noticed for about a minute then it melted wire back to plug .now i have no dash lights and car does not start now-- however i can hotwire at ignition block and it will start and run -- i fitted another fusebox today (thanks Peteracs)--all lights working nicely now but still no ignition any ideas please--thanks in advance