i have a 1995 jimmy 4.3. I recently installed a heater core when i put my deash back together i realized i had no speedo or any gauges.. I thought i wrecked the cluster so i picked up another but same result it lights up but gauges dont reall do anything just the heat gauge goes wayyy up. I ve checked duses and cant find and problem any ideas could i have blown or unplugged somthin thanks

 

have a 1995 blazer 4.3. I recently installed a heater core when i put my deash back together i realized i had no speedo or any gauges.. I thought i wrecked the cluster so i picked up another but same result it lights up but gauges dont reall do anything just the heat gauge goes wayyy up. I ve checked duses and cant find and problem any ideas could i have blown or unplugged somthin thanks