golf tdi electrical probs HELP
 

I CAN NOT GET MY SPEEDO TO WORK, ALSO I HAVE A FLOOPY FUEL GAUGE EVERYTIME I TURN A CORNER IT DROPS TO RED AND THE COMPUTER BEEPS AND TELLS ME TO REFUEL, BOTH PROBLEMS HAPPEND AT THE SAME TIME, ALSO THE COMPUTER WILL NOT TELL ME MY AVERGE MPG, MPH, THIS ALL HAPPENED AFTER I REPLACED A REAR BRAKE BULB, PLEASE HELP ITS DRIVING ME MAD