Panel lamps out - fuse OK

Wasn't there a voltage regulator on the cluster that dropped the voltage down for the lights and such....maybe that went bad or the terminal are corroded?

Nope! The voltage reg is for the heat/fuel. The cluster lights used a direct 12Volts from the light switch...as in turning on your parking or headlights. Again thats why your switch can control the clusters dimming. Don't get me wrong, as stated earlier, some clusters light runs may run off from a ash try light or something but it is direct from the switch via batt fuse box