Elecrical problem On 1972 Duster

Here is plan for later in week, Taking Alternator to have it checked, Before taking alternator of, jump across the amp gauge and see if it effects anything, Check water in battery ( a little late on this one) , If alternator checks ok, don't think it will , check battery. Next ,f none of this helps , run a heavy wire from alternator to positive post of battery to by pass the amp gauge , remove amp meter and install a volt meter in car . Thanks for all the comments , been a big help , I will update as we get it cornered !