My 380 had a problem with the gauges.Itraced it to a bad ground in the printed circut. I unwrapped the 4 wire harness and cut the brown wire, stripped the ends and fastened a3rd wire to it. The other end of it Ibolted to the instrument cluster where it hit the ground band of the circut. This may not be your problem but Ihope it helps someone. My gauges would flutter at 1st,then they wouldn't work, then when I used my turn signals all gauges except the vacume gauge would go up and down. MBgets about $350 for the part. Got lucky, spent 98cents.