For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.
USB C Ports taken from Exactly same model. Connected to the board without connecting board to the battery. Just board, USB C ports and USB charging cable shows 5v 0.00a.
"and slowly increase"
42 ohm is not low enough to heat something with low voltage.
However, performant IR camera can detect the culprit before your fingers!