What Are These Colored Wires On My Full Sweep Electric Boost/Vac Gauge For?

  • Red = key on power supply.
    *Must stay powered on during cranking of starter. Failure to do so may cause mis-calibration of gauge
  • Black = common chassis ground
  • White (Cobalt, C2, Lunar, & NV series only) = dash lighting power
  • Gray, Purple, & Black = communication between sender and gauge