What causes the speedo to stop working and the traction control light with the abs light to come on intermittently on a 2000 vectra?

Hi ,

If like me this drove me mad and i tried every man and his dog to fix it but couldent. if you flick the ignition / key does it reset and is ok for a bit. If so it is a gearbox sensor about £15 .hope it works

i have a jsii vectra could be ur fuse i can take mine out and light my fronties up lockd in 1st gear its a 10 amp RED between 2 yellows on the bottom row near the end on right side im from N.Z so urz maybe different