My 97 GQ has started doing something very odd, after turning my car off (and taking keys out of ignition) my dash shows like it is in acc. Battery guage still works, the oil light, hand brake light stay on. I thought it might have been a fault in the ignition switch shorting out and giving permanent power but i have tested that theory by removing the fuse and the switch and dash still lights up. I can't think whee else would fault to cause this, ideas? And ways of testing would be very appreciated.

Thanks in advance
Dave