Alternator

On a side note, Ma knew this was a weak sister, and provided a kind of better wiring known commonly as Fleet/ police/ taxi. You can find this in some of the service manuals involving factory 65A optional alternators. The ammeter leads were run through the firewall separately in a dedicated grommet.

Also, starting in the early 70's some of the big boats ("C" or "Sea Barges" LOL) used a different setup called "external shunt" The ammeter instrument was NOT a full current meter. Instead, it was a much more sensitive instrument fed with about no 16 or even no 18 wire. Those wires lead out and connected into the large wiring in the harness, using the wiring itself for a shunt. This was done essentially the same way in GM and Ford vehicles. A problem with many of those is that they were "numb". In other words, AKA sitting stopped, if you say, turned on the headlights, you had to REALLY look carefully at the meter to see if it moved!!! This VARIED as to the wiring and as to the car model, one of the worst being and 87, and later, 86 Ford Ranger I had