I have just bought a 2002 corsa 1.0 lt life. The radio had been removed so fitted another, the display in the binnacle in the dash is very dim. I have been told the bulbs need replacing! But I cannot see how to get to them. Has anybody any info? I tried utube but only shows a later version. It als seems I have to remove the speedo head to get the the mileometer bulb?