Ammeter bypass and aftermarket gauges.

BillGrissom said

True. I ran my ALT to BATT+ cable thru a fuse, in all my Mopars, plus the high-current diodes I mentioned. Easy to find a say 150 A, 32 VDC fuse you can bolt in-line. Or might use a "marine fuse" w/ holder and replaceable fuse. I did that in my home solar system batteries since 32 VDC rating doesn't suffice (51.2 VDC), but the marine fuses are rated higher (100 VDC? forget). In 1990's Magnum V-8 Jeeps, the thick cable from ALT to BAT+ runs thru a large fuse in the underhood fuse/relay box. I used that Jeep box in my old Mopars.

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To be clear, for the Chrysler ammeter-based charging/load distribution system from this time, even if the added shunt wire bypass has its own circuit protection, it will parallel the stock circuit protection device (16ga fusible link) for all stock under dash unfused wiring. Effectively defeating this original circuit protection for the stock wiring. Should a short occur, wires will burn with this shunt in place, with or without its own fusible link. Other steps need to take place to ensure complete and accurate circuit protection for all vehicle wiring. This so-called “shunt wire”, under-hood ammeter bypass is very dangerous when performed as most of those who promote it, say should be done.