Its not like I do not hear what you guys are saying. It has to do with we are not dealing with 60 amps. We are talking about anywhere between 80 and 150 amp alternators.
(1) What size wire do you have to have to run 100 amps through it?
Answer: 4 gauge. Nobody I know has a truck with 4 gauge wire going through the charging system. Some of us even have 65 year old 10 gauge wires under the dash in questionable shape.
(2) What circumstance would ever cause 100 amps to go through your completely inadequate wiring/gauge?
Answer that and then we can say we are done here. I do not have to tell anyone that has contributed so far what would happen if 100 amps went thru a 10 gauge wire. It would evaporate as fast as a fast blow fuse. If you caught it in time, you might be able to save your truck. I hope its not running inside the attached garage. I know you think this is alarmist, but it's prudent to be on the safe side.
Shunts are the best answer but unfortunately, there are no custom shunts available for our old gauges. At least in my extensive search I haven't found any that are feasible. The engineers that I have talked to say that isn't about to happen either due to the expense in creating metal combinations that have low enough resistive qualities.
