Voltage regulator dart rallye cluster?

RED and Black wires are ammeter a totally different unrelated circuit. Yes, chances are the others are also burned out. could it be something else? Sure, this is a very common issue but not the only.


Also if I have power to the cluster am I even sure the regulator is to blame?
Could something else be wrong?
Like I said before the red and black wires to the back of the cluster have 12.5volts.
And if I do fix the fuel gauge couldnt all the other gauges be burned out?

Thanks guys for all the help!