"Through the ammeter" is not how they are wired, but they put so much load on the charging system that they damage the charge wire, bulkhead connector, and ammeter--just like on A bodies and just like we are talking here (likely). I've said before, my old 70 RR ate the bulkhead connector and damaged the ammeter way back i the early 70's. And it didn't have a winch, lolol