The alternator has B+, DF, D+, & D- terminals. B+ goes to the battery. We are using the original VW harness between the regulator and alternator that has the original connectors on the ends so there shouldn’t be an issue. It wouldn’t charge with the old Motorola regulator either. The charge light does come on when the ignition is turned on but doesn’t go out with the engine running. Charge light is wired from the ignition through the light to the voltage reg where the blue wire and red wire are tied together in the VW harness and then on to the terminal on the alternator. The light will go out if I pull the connector off of the alternator so there is continuity there. Is the charge light of a special design? It has just a standard 2 wire panel light. And the dash is wood too.