Peugeot 306 Electrics?

Hi everyone, I have a strange problem with my 1998 306 1.4 petrol. It will start and tick over on the drive fine, but when I turn the steering wheel anti-clockwise, the fuel, temp, rev and speedo gauge needles all jump and flick. Some of the relays can be heard clicking, and it will start to misfire and eventually cut out. I've cleaned all the body earths, engine and battery earth. I've stripped the column to look for a rubbing wire. I've disconnected the indicator and wiper multiplugs. I've disconnected the airbag. Checked all the fuses with a multimeter, nothing makes any difference! Any help or advice would be very welcome! Thanks