Low charge to no charge issue pulling hair out

You could run a heavy jumper from batt positive and tie it the married ammeter wires that will bypass the bulkhead connector.

Then you could do the same from batt positive to alt post.

You can leave all the other OEM wiring in place.

Basically you are bypassing the bulkhead terminals to/from the battery and From the alternator.

If your voltage drop goes away you know the resistance is in the bulkhead connectors.


Btw use caution as this setup also bypasses the fusable link. So no protection to the cars wiring