So..... I unplugged everything checked wire colours, flasher relays, ran a test light across everything, pulled some more of my hair out, put it all back together and... then I pulled the lights on and nothing happened, not even the indicators lighting up, but then I started to turn the lights on and off repeatedly and hey presto on came the dash lights, then they went off and the indicators came on again. I have found its the light switch. If you pull it on too far the indicators come on and if you give it a wriggle and hold your tongue the right way the dash lights come on. Thanks to Salmon and Pete your help has been invaluable, I am sure you were starting to think I was an idiot. I know I was.