68 Dart wiring questions

Mattax said
Only battery charging gets bypassed with a direct wire. Current still needs to go through one or the other feed at the bulkhead to run everything else

That's what I was trying to get at.

In stock form the alt goes through a bulkhead connector to the Ammeter then Back out through a bulkhead connector to the battery

Along the way it gets tapped into to run the car

By leaving the cars OEM wiring in place the current to run the car gets shared by 2 bulkhead connectors halving the current on each

Adding the alt to battery post on the starter relay wire the battery charging current stays out of the bulkhead connectors (mostly)

It's a form of MAD bypass

A fuse on the bypass wire should protect the car from an alternator short.

Once that fuse blows the rest of the cars wiring should work as designed and the fusible link would be next.

At least that's how I see it.