When you say the dash board lights what do you mean?? If the dash board earth which is the return for all the dashboard warning lights is intermittant it could mean that the lights are being used for the earth return some other system and therefore being illuminated. Check the earth wire for the dash lights Check the back of the dash for a broken track/crack on the reverse of the dash. Just an idea?? make sure the plug onto the dash is secure and the pins are not burnt or damaged, earth wire is normally black but not too sure on this car could be brown or white need to check your manual or google it. Goog luck it never easy!!