THIS IS FOR OLDER TSO CHT AND EGT UNITS THAT USED THE METAL CASE, WITH FOUR WIRES.
THE LIGHT WIRES ARE THE WHITE AND GREEN. CONNECT ONE TO GROUND THE OTHER TO 12 VOLT POWER.
THE THERMOCOUPLE CONNECTS TO THE RED AND BLACK. CONNECT THE RED LEAD TO THE WHITE THERMOCOUPLE. CONNECT THE BLACK LEAD TO THE WHITE THERMOCOUPLE.
