This is all 100% stock 63 wiring. No fusible links. No "direct wire" to the alternator. It's all stock. Big red runs from the alternator through the bulkhead, to the ammeter, back out the black and "wherever" it goes from there......evidently to the battery. It's not bypassing the ammeter.....it's not charging. Period. I put the meter both directly on the alternator and the battery as well. It shows battery voltage only.