Lately I’ve been having issues starting my 91. I was getting no cranking, and no click when I turned the key, but my ammeter was showing voltage and all my accessory were still getting power. One time while turning the key, all of the sudden everything just got power cut from it. Now no accessories working, and no reading on the ammeter/ none of the gauges are moving. I went and got the battery checked, and it’s fully charged and is a good battery. I have a fusible link on the way to eliminate that, any ideas in the meantime what it could be or where to look/how to diagnose it?