Round back to square back alt

I've said this before. The BIGGEST issue with the failures in the Mopar system is

1...the terminals used in the bulkhead connector for the ammeter, which were never designed for more than 20-25A. These same type of flag/ spade push on terminals were used in my days of HVAC. I used to service a fair number of heat pumps, and the usual norm for an air handler/ auxiliary heat is simply an electric furnace. The usual elements are fairly standard at nominal 5KW so apporox. 20A draw at 240V (nominal 4800W) AND THEY STILL FAILED sometimes at that level.

2...The ammeter construction, varies with model. On my 70RR the cluster housing was plastic, so ANY loosening of the nuts/ studs resulting in more softening of the plastic and more looseness. OF COURSE it failed!!! The only way to fix that and keep the ammeter is to silver braze the studs to the shunt, and then make absolutely certain that the studs and nuts are "locked" to good quality connections with the eyelet wire ends.

3...And I've said THIS before. Ma knew FULL WELL about the problem, as even by 70-ish, some of the big boats had external shunt ammeter circuits, as well as optional wiring (fleet-police-taxi) which at least partially bypassed the bulkhead problem.